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Gu H, Zhu A, Xia J, Li W, Zheng J, Yang T, Li S, Zhang N, Mei S, Cai Y, Chen S, Liang C, Xing G. Nanoscale phase management of the 2D/3D heterostructure toward efficient perovskite solar cells. Sci Bull (Beijing) 2024; 69:2853-2861. [PMID: 39127566 DOI: 10.1016/j.scib.2024.07.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Revised: 05/22/2024] [Accepted: 06/28/2024] [Indexed: 08/12/2024]
Abstract
The stabilization of the formamidinium lead iodide (FAPbI3) structure is pivotal for the development of efficient photovoltaic devices. Employing two-dimensional (2D) layers to passivate the three-dimensional (3D) perovskite is essential for maintaining the α-phase of FAPbI3 and enhancing the power conversion efficiency (PCE) of perovskite solar cells (PSCs). However, the role of bulky ligands in the phase management of 2D perovskites, crucial for the stabilization of FAPbI3, has not yet been elucidated. In this study, we synthesized nanoscale 2D perovskite capping crusts with = 1 and 2 Ruddlesden-Popper (RP) perovskite layers, respectively, which form a type-II 2D/3D heterostructure. This heterostructure stabilizes the α-phase of FAPbI3, and facilitates ultrafast carrier extraction from the 3D perovskite network to transport contact layer. We introduced tri-fluorinated ligands to mitigate defects caused by the halide vacancies and uncoordinated Pb2+ ions, thereby reducing nonradiative carrier recombination and extending carrier lifetime. The films produced were incorporated into PSCs that not only achieved a PCE of 25.39% but also maintained 95% of their initial efficiency after 2000 h of continuous light exposure without encapsulation. These findings underscore the effectiveness of a phase-pure 2D/3D heterostructure-terminated film in inhibiting phase transitions passivating the iodide anion vacancy defects, facilitating the charge carrier extraction, and boosting the performance of optoelectronic devices.
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Affiliation(s)
- Hao Gu
- Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Macao 999078, China
| | - Annan Zhu
- Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Macao 999078, China
| | - Junmin Xia
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications (NUPT), Nanjing 210023, China
| | - Wang Li
- Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Macao 999078, China
| | - Jiahao Zheng
- Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Macao 999078, China
| | - Tao Yang
- MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, School of Physics, National Innovation Platform (Center) for Industry-Education Integration of Energy Storage Technology, Xi'an Jiaotong University, Xi'an 710049, China
| | - Shengwen Li
- Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Macao 999078, China
| | - Nan Zhang
- MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, School of Physics, National Innovation Platform (Center) for Industry-Education Integration of Energy Storage Technology, Xi'an Jiaotong University, Xi'an 710049, China; Ministry of Industry and Information Technology Key Lab of Micro-Nano Optoelectronic Information System, Guangdong Provincial Key Laboratory of Semiconductor Optoelectronic Materials and Intelligent Photonic Systems, Harbin Institute of Technology, Shenzhen 518055, China
| | - Shiliang Mei
- Institute for Electric Light Sources, School of Information Science and Technology, Fudan University, Shanghai 200433, China
| | - Yongqing Cai
- Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Macao 999078, China
| | - Shi Chen
- Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Macao 999078, China
| | - Chao Liang
- MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, School of Physics, National Innovation Platform (Center) for Industry-Education Integration of Energy Storage Technology, Xi'an Jiaotong University, Xi'an 710049, China; Ministry of Industry and Information Technology Key Lab of Micro-Nano Optoelectronic Information System, Guangdong Provincial Key Laboratory of Semiconductor Optoelectronic Materials and Intelligent Photonic Systems, Harbin Institute of Technology, Shenzhen 518055, China.
| | - Guichuan Xing
- Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Macao 999078, China.
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2
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Yang C, Hu W, Liu J, Han C, Gao Q, Mei A, Zhou Y, Guo F, Han H. Achievements, challenges, and future prospects for industrialization of perovskite solar cells. LIGHT, SCIENCE & APPLICATIONS 2024; 13:227. [PMID: 39227394 PMCID: PMC11372181 DOI: 10.1038/s41377-024-01461-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 04/07/2024] [Accepted: 04/20/2024] [Indexed: 09/05/2024]
Abstract
In just over a decade, certified single-junction perovskite solar cells (PSCs) boast an impressive power conversion efficiency (PCE) of 26.1%. Such outstanding performance makes it highly viable for further development. Here, we have meticulously outlined challenges that arose during the industrialization of PSCs and proposed their corresponding solutions based on extensive research. We discussed the main challenges in this field including technological limitations, multi-scenario applications, sustainable development, etc. Mature photovoltaic solutions provide the perovskite community with invaluable insights for overcoming the challenges of industrialization. In the upcoming stages of PSCs advancement, it has become evident that addressing the challenges concerning long-term stability and sustainability is paramount. In this manner, we can facilitate a more effective integration of PSCs into our daily lives.
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Affiliation(s)
- Chuang Yang
- Michael Grätzel Center for Mesoscopic Solar Cells, Wuhan National Laboratory for Optoelectronics, Key Laboratory of Materials Chemistry for Energy Conversion and Storage of Ministry of Education, Huazhong University of Science and Technology, Wuhan, 430074, Hubei, China
| | - Wenjing Hu
- Michael Grätzel Center for Mesoscopic Solar Cells, Wuhan National Laboratory for Optoelectronics, Key Laboratory of Materials Chemistry for Energy Conversion and Storage of Ministry of Education, Huazhong University of Science and Technology, Wuhan, 430074, Hubei, China
| | - Jiale Liu
- Michael Grätzel Center for Mesoscopic Solar Cells, Wuhan National Laboratory for Optoelectronics, Key Laboratory of Materials Chemistry for Energy Conversion and Storage of Ministry of Education, Huazhong University of Science and Technology, Wuhan, 430074, Hubei, China
| | - Chuanzhou Han
- Michael Grätzel Center for Mesoscopic Solar Cells, Wuhan National Laboratory for Optoelectronics, Key Laboratory of Materials Chemistry for Energy Conversion and Storage of Ministry of Education, Huazhong University of Science and Technology, Wuhan, 430074, Hubei, China
| | - Qiaojiao Gao
- Michael Grätzel Center for Mesoscopic Solar Cells, Wuhan National Laboratory for Optoelectronics, Key Laboratory of Materials Chemistry for Energy Conversion and Storage of Ministry of Education, Huazhong University of Science and Technology, Wuhan, 430074, Hubei, China
| | - Anyi Mei
- Michael Grätzel Center for Mesoscopic Solar Cells, Wuhan National Laboratory for Optoelectronics, Key Laboratory of Materials Chemistry for Energy Conversion and Storage of Ministry of Education, Huazhong University of Science and Technology, Wuhan, 430074, Hubei, China
| | - Yinhua Zhou
- Michael Grätzel Center for Mesoscopic Solar Cells, Wuhan National Laboratory for Optoelectronics, Key Laboratory of Materials Chemistry for Energy Conversion and Storage of Ministry of Education, Huazhong University of Science and Technology, Wuhan, 430074, Hubei, China
| | - Fengwan Guo
- Collaborative Innovation Center for Advanced Organic Chemical Materials, Co-constructed by the Province and Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, Hubei, China.
| | - Hongwei Han
- Michael Grätzel Center for Mesoscopic Solar Cells, Wuhan National Laboratory for Optoelectronics, Key Laboratory of Materials Chemistry for Energy Conversion and Storage of Ministry of Education, Huazhong University of Science and Technology, Wuhan, 430074, Hubei, China.
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3
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Jiang Z, Ko B, Berry KR, Xing X, Yi Z, Sokolov AV, Hu J, Bao J, Zhang Z. Synergistic Effect of Laser, Water Vapor, and Electron-Beam on the Degradation of Quasi-Two-Dimensional Ruddlesden-Popper Perovskite Flakes. ACS OMEGA 2024; 9:35744-35756. [PMID: 39184503 PMCID: PMC11339840 DOI: 10.1021/acsomega.4c04188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/01/2024] [Revised: 07/02/2024] [Accepted: 07/30/2024] [Indexed: 08/27/2024]
Abstract
Understanding the effects of laser light, water vapor, and energetic electron irradiation on the intrinsic properties of perovskites is important in the development of perovskite-based solar cells. Various phase transition and degradation processes have been reported when these agents interact with perovskites separately. However, detailed studies of their synergistic effects are still missing. In this work, the synergistic effect of three factors (exposure to laser light, water vapor, and e-beam) on the optical and physical properties of two-dimensional (2D) Ruddlesden-Popper (RP) perovskite flakes [(BA)2(MA)2Pb3Br10] has been investigated in an environmental cell. When the perovskite flakes were subjected to moderate laser irradiation in a humid environment after prior e-beam irradiation, the photoluminescence (PL) peak centered at 480 nm vanished, while a new PL peak centered at 525 nm emerged, grew, and then quenched. This indicates the degradation process of the 2D RP perovskite was a phase transition to a three-dimensional (3D) perovskite [MAPbBr3] followed by the degradation of 3D perovskite. The spatial distribution of the 525 nm PL signal shows that this phase-transition process spreads across the flake to the area as far as ∼40 μm from the laser spot. Without humidity, the phase transition happened in the laser-irritated area but did not spread, which suggests that moisture enhanced the ion migration from the laser-scanned area to the rest of the flake and accelerated the phase transition in the nearby area. Experiments with no prior e-beam irradiation show that e-beam irradiation is the key to activating the 2D-3D phase transition. Therefore, when the three factors work synergistically, a conversion from the 2D RP perovskite into the 3D perovskite is not localized and propagates through the perovskite. These findings contribute to our understanding of the complex interactions between external stimuli and perovskite materials, thereby advancing the development of efficient and stable perovskite-based solar cells.
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Affiliation(s)
- Zhenfei Jiang
- Institute
for Quantum Science and Engineering and Department of Physics and
Astronomy, Texas A&M University, College Station, Texas 77843, United States
| | - Brian Ko
- Department
of Physics, Baylor University, Waco, Texas 76798, United States
| | - Keith R. Berry
- Division
of Agriculture, University of Arkansas, Little Rock, Arkansas 72204, United States
| | - Xinxin Xing
- Department
of Electrical & Computer Engineering and Texas Center for Superconductivity
(TCSUH), University of Houston, Houston, Texas 77204, United States
| | - Zhenhuan Yi
- Institute
for Quantum Science and Engineering and Department of Physics and
Astronomy, Texas A&M University, College Station, Texas 77843, United States
| | - Alexei V. Sokolov
- Institute
for Quantum Science and Engineering and Department of Physics and
Astronomy, Texas A&M University, College Station, Texas 77843, United States
- Department
of Physics, Baylor University, Waco, Texas 76798, United States
| | - Jonathan Hu
- Department
of Electrical and Computer Engineering, Baylor University, Waco, Texas 76798, United States
| | - Jiming Bao
- Department
of Electrical & Computer Engineering and Texas Center for Superconductivity
(TCSUH), University of Houston, Houston, Texas 77204, United States
| | - Zhenrong Zhang
- Department
of Physics, Baylor University, Waco, Texas 76798, United States
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4
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Ghosh S, Pradhan B, Bandyopadhyay A, Skvortsova I, Zhang Y, Sternemann C, Paulus M, Bals S, Hofkens J, Karki KJ, Materny A. Rashba-Type Band Splitting Effect in 2D (PEA) 2PbI 4 Perovskites and Its Impact on Exciton-Phonon Coupling. J Phys Chem Lett 2024; 15:7970-7978. [PMID: 39077842 PMCID: PMC11318034 DOI: 10.1021/acs.jpclett.4c01957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2024] [Revised: 07/10/2024] [Accepted: 07/11/2024] [Indexed: 07/31/2024]
Abstract
Despite a few recent reports on Rashba effects in two-dimensional (2D) Ruddlesden-Popper (RP) hybrid perovskites, the precise role of organic spacer cations in influencing Rashba band splitting remains unclear. Here, using a combination of temperature-dependent two-photon photoluminescence (2PPL) and time-resolved photoluminescence spectroscopy, alongside density functional theory (DFT) calculations, we contribute to significant insights into the Rashba band splitting found for 2D RP hybrid perovskites. The results demonstrate that the polarity of the organic spacer cation is crucial in inducing structural distortions that lead to Rashba-type band splitting. Our investigations show that the intricate details of the Rashba band splitting occur for organic cations with low polarity but not for more polar ones. Furthermore, we have observed stronger exciton-phonon interactions due to the Rashba-type band splitting effect. These findings clarify the importance of selecting appropriate organic spacer cations to manipulate the electronic properties of 2D perovskites.
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Affiliation(s)
- Supriya Ghosh
- School
of Science, Constructor University, Campus Ring 1, 28759 Bremen, Germany
- Department
of Chemistry and Biochemistry, The Ohio
State University, 100 West 18th Avenue, Columbus, Ohio 43210, United States
| | - Bapi Pradhan
- Department
of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001 Heverlee, Belgium
| | - Arkamita Bandyopadhyay
- Bremen
Center for Computational Materials Science, University of Bremen, 28359 Bremen, Germany
| | - Irina Skvortsova
- Electron
Microscopy for Materials Research, University
of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
| | - Yiyue Zhang
- Department
of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001 Heverlee, Belgium
| | | | - Michael Paulus
- Fakultät
Physik/DELTA, Technische Universität
Dortmund, 44221 Dortmund, Germany
| | - Sara Bals
- Electron
Microscopy for Materials Research, University
of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
| | - Johan Hofkens
- Department
of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001 Heverlee, Belgium
- Max
Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Khadga J. Karki
- Guangdong
Technion Israel Institute of Technology, 241 Daxue Road, Shantou, Guangdong Province 515603, P. R. China
| | - Arnulf Materny
- School
of Science, Constructor University, Campus Ring 1, 28759 Bremen, Germany
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5
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Zhou W, Chen X, Zhou R, Cai H, Wang Y, Zhang T, Zheng Z, Gao F, Zhang Y, Yan H. The Role of Grain Boundaries on Ion Migration and Charge Recombination in Halide Perovskites. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2310368. [PMID: 38511564 DOI: 10.1002/smll.202310368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Revised: 03/07/2024] [Indexed: 03/22/2024]
Abstract
Grain boundaries (GBs) have a significant role in polycrystalline perovskite solar cells (PSCs). However, there is ongoing debate regarding the impact of GBs on the performance and long-term stability of PSCs. Employing the first-principles molecular dynamics for perovskites, the iodine vacancy defect migrations both in bulk and at GBs are investigated. i) The positive iodine vacancy (VI +) is found that have both lower formation energy (1.4 eV) and activation energy (0.18 eV) than those of neutral iodine vacancy (VI), statistically. It indicated the VI + acts as the dominant migrated iodine vacancy rather than VI; ii) the iodine vacancy at GBs has ≈0.48 eV higher activation energy than those in bulk, which leads to the accumulation of iodine vacancy at GBs; iii) the presence of VI + result in a 3-fold increase in charge recombination ratio at GBs, compared to pristine PSCs. Based on quantum molecular dynamics statistical results, which are consistent with experimental measurements, insights into iodine vacancy migration both at GBs and in the bulk are gained. This understanding can be valuable for defects engineering related to ion migration, in order to improve the long-term stability and promote the performance of PSCs.
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Affiliation(s)
- Wencai Zhou
- The Faculty of Materials and Manufacturing, Faculty of Information Technology, Beijing University of Technology, Beijing, 100124, China
| | - Xiaoqing Chen
- The Faculty of Materials and Manufacturing, Faculty of Information Technology, Beijing University of Technology, Beijing, 100124, China
| | - Rongkun Zhou
- The Faculty of Materials and Manufacturing, Faculty of Information Technology, Beijing University of Technology, Beijing, 100124, China
| | - Hongbo Cai
- The Faculty of Materials and Manufacturing, Faculty of Information Technology, Beijing University of Technology, Beijing, 100124, China
| | - Yun Wang
- The Faculty of Materials and Manufacturing, Faculty of Information Technology, Beijing University of Technology, Beijing, 100124, China
| | - Tiankai Zhang
- Department of Physics, Chemistry and Biology (IFM), Linköping University, Linköping, 58183, Sweden
| | - Zilong Zheng
- The Faculty of Materials and Manufacturing, Faculty of Information Technology, Beijing University of Technology, Beijing, 100124, China
| | - Feng Gao
- Department of Physics, Chemistry and Biology (IFM), Linköping University, Linköping, 58183, Sweden
| | - Yongzhe Zhang
- The Faculty of Materials and Manufacturing, Faculty of Information Technology, Beijing University of Technology, Beijing, 100124, China
| | - Hui Yan
- The Faculty of Materials and Manufacturing, Faculty of Information Technology, Beijing University of Technology, Beijing, 100124, China
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6
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Zhan C, Luo C, Gao F, Wang X, Li Y, Zhao Q. Indium Tin Oxide Induced Internal Positive Feedback and Indium Ion Transport in Perovskite Solar Cells. Angew Chem Int Ed Engl 2024; 63:e202403824. [PMID: 38727541 DOI: 10.1002/anie.202403824] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2024] [Indexed: 06/21/2024]
Abstract
Stability is the most pressing challenge hindering the commercialization of perovskite solar cells (PSCs), and previous efforts focused more on enhancing the resistance of PSCs to external stimulus. Here, we found that the indium tin oxide (ITO) will deteriorate the photovoltaic performance of PSCs through positive feedback cycles. Specifically, the perovskite degradation products will cross the electron transport layer to chemically etch the electrode ITO to generate In3+, which will migrate upwards into the perovskite film. Then, the reaction that corrodes ITO consumes the decomposition products of perovskite and shifts the balance of the perovskite decomposition reaction, further promoting the degradation and thus falling into a positive feedback cycle. Moreover, the In3+ in the perovskite film was found to accumulate at the upper surface, which would lead to n-type doping of perovskite film to form the energy barrier for interface carrier extraction. Subsequently, the chelating molecule ethylenediaminetetraacetic acid disodium salt (EDTA-2Na) was introduced onto ITO to firmly chelate the In3+ and prevent it from migrating upward, thus breaking this internal positive feedback cycle and significantly enhancing the efficiency and stability of PSCs. This work provides new perspectives for understanding the mechanism of photovoltaic performance loss and ionic transport in PSCs.
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Affiliation(s)
- Changling Zhan
- State Key Lab for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics, School of Physics, Peking University, Beijing, 100871, China
| | - Chao Luo
- State Key Lab for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics, School of Physics, Peking University, Beijing, 100871, China
| | - Feng Gao
- State Key Lab for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics, School of Physics, Peking University, Beijing, 100871, China
| | - Xianjin Wang
- State Key Lab for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics, School of Physics, Peking University, Beijing, 100871, China
| | - Yang Li
- State Key Lab for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics, School of Physics, Peking University, Beijing, 100871, China
| | - Qing Zhao
- State Key Lab for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics, School of Physics, Peking University, Beijing, 100871, China
- Peking University Yangtze Delta Institute of Optoelectronics, Nantong, 226000, China
- Collaborative Innovation Center of Quantum Matter, Beijing, 100871, China
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7
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Ren Q, Zhu C, Ma S, Wang Z, Yan J, Wan T, Yan W, Chai Y. Optoelectronic Devices for In-Sensor Computing. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024:e2407476. [PMID: 39004873 DOI: 10.1002/adma.202407476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2024] [Revised: 06/27/2024] [Indexed: 07/16/2024]
Abstract
The demand for accurate perception of the physical world leads to a dramatic increase in sensory nodes. However, the transmission of massive and unstructured sensory data from sensors to computing units poses great challenges in terms of power-efficiency, transmission bandwidth, data storage, time latency, and security. To efficiently process massive sensory data, it is crucial to achieve data compression and structuring at the sensory terminals. In-sensor computing integrates perception, memory, and processing functions within sensors, enabling sensory terminals to perform data compression and data structuring. Here, vision sensors are adopted as an example and discuss the functions of electronic, optical, and optoelectronic hardware for visual processing. Particularly, hardware implementations of optoelectronic devices for in-sensor visual processing that can compress and structure multidimensional vision information are examined. The underlying resistive switching mechanisms of volatile/nonvolatile optoelectronic devices and their processing operations are explored. Finally, a perspective on the future development of optoelectronic devices for in-sensor computing is provided.
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Affiliation(s)
- Qinqi Ren
- Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon, Hong Kong, 999077, China
- Joint Research Centre of Microelectronics, The Hong Kong Polytechnic University, Kowloon, Hong Kong, 999077, China
| | - Chaoyi Zhu
- Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon, Hong Kong, 999077, China
- Joint Research Centre of Microelectronics, The Hong Kong Polytechnic University, Kowloon, Hong Kong, 999077, China
| | - Sijie Ma
- Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon, Hong Kong, 999077, China
- Joint Research Centre of Microelectronics, The Hong Kong Polytechnic University, Kowloon, Hong Kong, 999077, China
| | - Zhaoqing Wang
- Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon, Hong Kong, 999077, China
- Joint Research Centre of Microelectronics, The Hong Kong Polytechnic University, Kowloon, Hong Kong, 999077, China
| | - Jianmin Yan
- Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon, Hong Kong, 999077, China
- Joint Research Centre of Microelectronics, The Hong Kong Polytechnic University, Kowloon, Hong Kong, 999077, China
| | - Tianqing Wan
- Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon, Hong Kong, 999077, China
- Joint Research Centre of Microelectronics, The Hong Kong Polytechnic University, Kowloon, Hong Kong, 999077, China
| | - Weicheng Yan
- Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon, Hong Kong, 999077, China
- Joint Research Centre of Microelectronics, The Hong Kong Polytechnic University, Kowloon, Hong Kong, 999077, China
| | - Yang Chai
- Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon, Hong Kong, 999077, China
- Joint Research Centre of Microelectronics, The Hong Kong Polytechnic University, Kowloon, Hong Kong, 999077, China
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8
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Kanti Panda M, Acharjee D, Nandi N, Koley S, Ghosh S. Unveiling the Influence of Brightness Heterogeneity in Fluorescence Correlation Spectroscopy of Perovskite Nanocrystals. Chemistry 2024:e202401938. [PMID: 38984590 DOI: 10.1002/chem.202401938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2024] [Revised: 07/08/2024] [Accepted: 07/10/2024] [Indexed: 07/11/2024]
Abstract
Nanoparticles (NPs), including perovskite nanocrystals (PNCs) with single photon purity, present challenges in fluorescence correlation spectroscopy (FCS) studies due to their distinct photoluminescence (PL) behaviors. In particular, the zero-time correlation amplitude [g2(0)] and the associated diffusion timescale (τD) of their FCS curves show substantial dependency on pump intensity (IP). Optical saturation inadequately explains the origin of this FCS phenomenon in NPs, thus setting them apart from conventional dye molecules, which do not manifest such behavior. This observation is apparently attributed to either photo-brightening or optical trapping, both lead to increased NP occupancy (N) in the excitation volume, consequently reducing the g2(0) amplitude [since g2(0) α 1/N] at high IP. However, an advanced FCS study utilizing alternating laser excitation at two different intensities dismisses such possibilities. Further investigation into single-particle blinking behaviors as a function of IP reveals that the intensity dependence of g2(0) primarily arises from the brightness heterogeneity prevalent in almost all types of NPs. This report delves into the complexities of the photophysical properties of NPs and their adverse impacts on FCS studies.
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Affiliation(s)
- Mrinal Kanti Panda
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute (HBNI), Khurda, Odisha, 752050, India
| | - Debopam Acharjee
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute (HBNI), Khurda, Odisha, 752050, India
| | - Nilanjana Nandi
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute (HBNI), Khurda, Odisha, 752050, India
| | - Somnath Koley
- Institute of Physics, Sachivalaya Marg, Gajapati Nagar, Bhubaneswar, Odisha, 751005
| | - Subhadip Ghosh
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute (HBNI), Khurda, Odisha, 752050, India
- Center for Interdisciplinary Sciences (CIS), National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute (HBNI), Khurda, Odisha, 752050, India
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9
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Jamshidi M, Gardner JM. Temperature-dependent excited states for detecting reversible phase transitions in 2D lead(II) iodide perovskites. Dalton Trans 2024; 53:10544-10552. [PMID: 38842322 DOI: 10.1039/d4dt01210k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2024]
Abstract
Significant interest exists in water-tolerant 2D lead iodide perovskites owing to their stability and proven potential in photovoltaic and photonic applications. These materials have solid-state phase transitions that are accessible below 100 °C. Here, the study witnesses the multiple phase transitions of the last members of a series of organic-inorganic hybrid materials, [(CnH2n+1NH3)2PbI4], with even n as n = 14, 16, and 18, once again. By employing temperature-dependent steady-state photoluminescence (PL) and temperature-dependent time-resolved photoluminescence (TRPL) spectroscopy in the temperature range of -18 to +90 °C and at -196 °C, we explore the thermal responses of these materials. The investigation reveals reversible phase transitions occurring between room temperature (RT) and elevated temperatures, impacting the optical properties and emitting colors of the perovskite compounds. The longer the alkyl chain, the higher the phase transition temperature, attributed to increased conformational disorder and enhanced perovskite symmetry. The decay constants for all compounds are very close in value, which confirms the underlying excited-state dynamics, pointing to contributions primarily from inorganic components across different phases. We anticipate that our results on the detection of phase transitions in 2D perovskites will not only motivate the use of these techniques for detecting phase transitions but also would help to understand their excited states in more details to selectively use them for solar cell and next-generation display technologies.
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Affiliation(s)
- Mahboubeh Jamshidi
- Department of Chemistry, Division of Applied Physical Chemistry, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden.
| | - James M Gardner
- Department of Chemistry, Division of Applied Physical Chemistry, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden.
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10
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Chen X, Kamat PV, Janáky C, Samu GF. Charge Transfer Kinetics in Halide Perovskites: On the Constraints of Time-Resolved Spectroscopy Measurements. ACS ENERGY LETTERS 2024; 9:3187-3203. [PMID: 38911533 PMCID: PMC11190987 DOI: 10.1021/acsenergylett.4c00736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Revised: 05/16/2024] [Accepted: 05/22/2024] [Indexed: 06/25/2024]
Abstract
Understanding photophysical processes in lead halide perovskites is an important aspect of optimizing the performance of optoelectronic devices. The determination of exact charge carrier extraction rate constants remains elusive, as there is a large and persistent discrepancy in the reported absolute values. In this review, we concentrate on experimental procedures adopted in the literature to obtain kinetic estimates of charge transfer processes and limitations imposed by the spectroscopy technique employed. Time-resolved techniques (e.g., transient absorption-reflection and time-resolved photoluminescence spectroscopy) are commonly employed to probe charge transfer at perovskite/transport layer interfaces. The variation in sample preparation and measurement conditions can produce a wide dispersion of the measured kinetic parameters. The selected time window and the kinetic fitting model employed introduce additional uncertainty. We discuss here evaluation strategies that rely on multiexponential fitting protocols (regular or stretched) and show how the dispersion in the reported values for carrier transfer rate constants can be resolved.
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Affiliation(s)
- Xiangtian Chen
- Department
of Physical Chemistry and Materials Science, Interdisciplinary Excellence
Centre, University of Szeged, Aradi Square 1, Szeged H-6720, Hungary
| | - Prashant V. Kamat
- Department
of Chemistry and Biochemistry, University
of Notre Dame, Notre
Dame, Indiana 46556, United States
| | - Csaba Janáky
- Department
of Physical Chemistry and Materials Science, Interdisciplinary Excellence
Centre, University of Szeged, Aradi Square 1, Szeged H-6720, Hungary
- ELI-ALPS,
ELI-HU Non-Profit Ltd., Wolfgang Sandner street 3., Szeged H-6728, Hungary
| | - Gergely Ferenc Samu
- ELI-ALPS,
ELI-HU Non-Profit Ltd., Wolfgang Sandner street 3., Szeged H-6728, Hungary
- Department
of Molecular and Analytical Chemistry, University
of Szeged, Dóm
Square 7-8. Szeged H-6721, Hungary
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11
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Moon J, Mehta Y, Gundogdu K, So F, Gu Q. Metal-Halide Perovskite Lasers: Cavity Formation and Emission Characteristics. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2211284. [PMID: 36841548 DOI: 10.1002/adma.202211284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 02/08/2023] [Indexed: 06/18/2023]
Abstract
Hybrid metal-halide perovskites (MHPs) have shown remarkable optoelectronic properties as well as facile and cost-effective processability. With the success of MHP solar cells and light-emitting diodes, MHPs have also exhibited great potential as gain media for on-chip lasers. However, to date, stable operation of optically pumped MHP lasers and electrically driven MHP lasers-an essential requirement for MHP laser's insertion into chip-scale photonic integrated circuits-is not yet demonstrated. The main obstacles include the instability of MHPs in the atmosphere, rudimentary MHP laser cavity patterning methods, and insufficient understanding of emission mechanisms in MHP materials and cavities. This review aims to provide a detailed overview of different strategies to improve the intrinsic properties of MHPs in the atmosphere and to establish an optimal MHP cavity patterning method. In addition, this review discusses different emission mechanisms in MHP materials and cavities and how to distinguish them.
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Affiliation(s)
- Jiyoung Moon
- Electrical and Computer Engineering, The University of Texas at Dallas, Richardson, TX, 75080, USA
| | - Yash Mehta
- Materials Science and Engineering, North Carolina State University, Raleigh, NC, 27695, USA
- Organic and Carbon Electronics Laboratories (ORaCEL), North Carolina State University, Raleigh, NC, 27695, USA
| | - Kenan Gundogdu
- Organic and Carbon Electronics Laboratories (ORaCEL), North Carolina State University, Raleigh, NC, 27695, USA
- Physics, North Carolina State University, Raleigh, NC, 27695, USA
| | - Franky So
- Materials Science and Engineering, North Carolina State University, Raleigh, NC, 27695, USA
- Organic and Carbon Electronics Laboratories (ORaCEL), North Carolina State University, Raleigh, NC, 27695, USA
| | - Qing Gu
- Organic and Carbon Electronics Laboratories (ORaCEL), North Carolina State University, Raleigh, NC, 27695, USA
- Physics, North Carolina State University, Raleigh, NC, 27695, USA
- Electrical and Computer Engineering, North Carolina State University, Raleigh, NC, 27695, USA
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12
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Zou Z, Qiu H, Shao Z. Unveiling heterogeneity of hysteresis in perovskite thin films. DISCOVER NANO 2024; 19:48. [PMID: 38499837 PMCID: PMC10948732 DOI: 10.1186/s11671-024-03996-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Accepted: 03/11/2024] [Indexed: 03/20/2024]
Abstract
The phenomenon of current-voltage hysteresis observed in perovskite-based optoelectronic devices is a critical issue that complicates the accurate assessment of device parameters, thereby impacting performance and applicability. Despite extensive research efforts aimed at deciphering the origins of hysteresis, its underlying causes remain a subject of considerable debate. By employing nanoscale investigations to elucidate the relationship between hysteresis and morphological characteristics, this study offers a detailed exploration of photocurrent-voltage hysteresis at the nanoscale within perovskite optoelectronic devices. Through the meticulous analysis of localized I-V curve arrays, our research identifies two principal hysteresis descriptors, uncovering a predominantly inverted hysteresis pattern in 87% of the locations examined. This pattern is primarily attributed to the energetic barrier encountered at the interface between the probe and the perovskite material. Our findings underscore the pronounced heterogeneity and grain-dependent variability inherent in hysteresis behavior, evidenced by an average Hysteresis Index value of 0.24. The investigation suggests that the localized hysteresis phenomena cannot be exclusively attributed to either photocharge collection processes or organic cation migration at grain boundaries. Instead, it appears significantly influenced by localized surface trap states, which play a pivotal role in modulating electron and hole current dynamics. By identifying the key factors contributing to hysteresis, such as localized surface trap states and their influence on electron and hole current dynamics, our findings pave the way for targeted strategies to mitigate these effects. This includes the development of novel materials and device architectures designed to minimize energy barriers and enhance charge carrier mobility, thereby improving device performance and longevity. This breakthrough in understanding the microscale mechanisms of hysteresis underscores the critical importance of surface/interface defect trap passivation in mitigating hysteretic effects, offering new pathways for enhancing the performance of perovskite solar cells.
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Affiliation(s)
- Zhouyiao Zou
- Industrial Training Center, Shenzhen Polytechnic University, Shenzhen, 518055, Guangdong, China
| | - Haian Qiu
- Physics Laboratory, School of Undergraduate Education, Shenzhen Polytechnic University, Shenzhen, 518055, Guangdong, China.
| | - Zhibin Shao
- Industrial Training Center, Shenzhen Polytechnic University, Shenzhen, 518055, Guangdong, China.
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13
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Wang Z, Wei Y, Chen Y, Zhang H, Wang D, Ke J, Liu Y, Hong M. "Whole-Body" Fluorination for Highly Efficient and Ultra-Stable All-Inorganic Halide Perovskite Quantum Dots. Angew Chem Int Ed Engl 2024; 63:e202315841. [PMID: 38179848 DOI: 10.1002/anie.202315841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 12/20/2023] [Accepted: 01/02/2024] [Indexed: 01/06/2024]
Abstract
Inherent "soft" ionic lattice nature of halide perovskite quantum dots (QDs), triggered by the weak Pb-X (X=Cl, Br, I) bond, is recognized as the primary culprit for their serious instability. A promising way is to construct exceedingly strong ionic interaction inside the QDs and increase their crystal cohesive energy by substituting the interior X- with highly electronegative F- , however, which is challenging and hitherto remains unreported. Here, a "whole-body" fluorination strategy is proposed for strengthening the interior bonding architecture of QDs, wherein the F- are uniformly distributed throughout the whole nanocrystal encompassing both the interior lattice and surface, successfully stabilizing their "soft" crystal lattice and passivating surface defects. This approach effectively mitigates their intrinsic instability issues including light-induced phase segregation. As a result, light-emitting devices based on these QDs exhibit exceptional efficiency and remarkable stability.
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Affiliation(s)
- Zhaoyu Wang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
- School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, China
| | - Youchao Wei
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
- Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, Fujian 350108, China
| | - Yameng Chen
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
- Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, Fujian 350108, China
| | - Haoyu Zhang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
- School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, China
| | - Di Wang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
- Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, Fujian 350108, China
| | - Jianxi Ke
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
- Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, Fujian 350108, China
| | - Yongsheng Liu
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
- Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, Fujian 350108, China
| | - Maochun Hong
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
- Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, Fujian 350108, China
- School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, China
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14
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Li Y, Wang D, Yang Y, Ding C, Hu Y, Liu F, Wei Y, Liu D, Li H, Shi G, Chen S, Li H, Fuchimoto A, Tosa K, Hiroki U, Hayase S, Wei H, Shen Q. Stable Inorganic Colloidal Tin and Tin-Lead Perovskite Nanocrystals with Ultralong Carrier Lifetime via Sn(IV) Control. J Am Chem Soc 2024; 146:3094-3101. [PMID: 38269444 DOI: 10.1021/jacs.3c10060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2024]
Abstract
Inorganic tin (Sn) perovskite nanocrystals offer a promising solution to the potential toxicity concerns associated with their established lead (Pb)-based counterparts. Yet, achieving their superior stability and optoelectronic properties remains an ongoing challenge. Here, we report a synthesis of high-symmetry α-phase CsSnI3 nanocrystals with an ultralong 278 ns carrier lifetime, exceeding previous benchmarks by 2 orders of magnitude through meticulous Sn(IV) control. The nanocrystals demonstrate excellent colloidal stability, uniform monodispersity, and a distinct exciton peak. Central to these outcomes is our designed solid-liquid antioxidation suspension of tri-n-octylphosphine (TOP) and zerovalent tin (Sn(0)) that fully addresses the unique coexisting oxygen-driven and solvent-driven Sn oxidation mechanisms in Sn perovskite nanocrystal synthesis. We uncover the largely undervalued function of TOP in mitigating oxygen-driven Sn oxidation and introduce Sn(0) powder to generate a synergistic antioxidation function with TOP, significantly reducing Sn(IV)-induced defects and distortions and contributing to enhanced optoelectronic properties. Strikingly, this approach also profoundly impacts inorganic Sn-Pb perovskite nanocrystals, boosting lifetimes by 2 orders of magnitude and increasing photoluminescence quantum yield over 100-fold to 35%. Our findings illuminate the potential of Sn-based nanocrystals for optoelectronic applications.
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Affiliation(s)
- Yusheng Li
- Faculty of Informatics and Engineering, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan
| | - Dandan Wang
- Faculty of Informatics and Engineering, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan
| | - Yongge Yang
- Faculty of Informatics and Engineering, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan
| | - Chao Ding
- Faculty of Informatics and Engineering, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan
| | - Yuyu Hu
- School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China
| | - Feng Liu
- Institute of Molecular Sciences and Engineering, Institute of Frontier and Interdisciplinary Science, Shandong University, Qingdao 266237, China
| | - Yuyao Wei
- Faculty of Informatics and Engineering, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan
| | - Dong Liu
- Faculty of Informatics and Engineering, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan
| | - Hua Li
- Faculty of Informatics and Engineering, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan
| | - Guozheng Shi
- Faculty of Informatics and Engineering, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan
| | - Shikai Chen
- Faculty of Informatics and Engineering, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan
| | - Hongshi Li
- Institute of New Energy Materials Chemistry, School of Materials Science and Engineering, Nankai University, TongYan Street 38, Jinnan District, Tianjin 300350, China
| | - Akihito Fuchimoto
- Faculty of Informatics and Engineering, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan
| | - Keita Tosa
- Faculty of Informatics and Engineering, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan
| | - Unno Hiroki
- Faculty of Informatics and Engineering, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan
| | - Shuzi Hayase
- i-Powered Energy System Research Center (i-PERC), The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan
| | - Huiyun Wei
- Faculty of Informatics and Engineering, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan
- School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China
| | - Qing Shen
- Faculty of Informatics and Engineering, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan
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15
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Feng S, Ju Y, Duan R, Man Z, Li S, Hu F, Zhang C, Tao S, Zhang W, Xiao M, Wang X. Complete Suppression of Phase Segregation in Mixed-Halide Perovskite Nanocrystals under Periodic Heating. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2308032. [PMID: 37994680 DOI: 10.1002/adma.202308032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Revised: 11/18/2023] [Indexed: 11/24/2023]
Abstract
Under continuous light illumination, it is known that localized domains with segregated halide compositions form in semiconducting mixed-halide perovskites, thus severely limiting their optoelectronic applications due to the negative changes in bandgap energies and charge-carrier characteristics. Here mixed-halide perovskite CsPbBr1.2 I1.8 nanocrystals are deposited onto an indium tin oxide substrate, whose temperature can be rapidly changed by ≈10 °C in a few seconds by applying or removing an external voltage. Such a sudden temperature change induces a temporary transition of CsPbBr1.2 I1.8 nanocrystals from the segregated phase to the mixed phase, the latter of which can be permanently maintained when the light illumination is coupled with periodic heating cycles. These findings mark the emergence of a practical solution to the detrimental phase-segregation problem, given that a small temperature modulation is readily available in various fundamental studies and practical devices of mixed-halide perovskites.
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Affiliation(s)
- Shengnan Feng
- School of Physics, National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China
| | - Yu Ju
- School of Physics, National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China
| | - Rentong Duan
- School of Physics, National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China
| | - Zaiqin Man
- College of Engineering and Applied Sciences, Nanjing University, Nanjing, 210093, China
| | - Shuyi Li
- School of Physics, National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China
| | - Fengrui Hu
- College of Engineering and Applied Sciences, Nanjing University, Nanjing, 210093, China
| | - Chunfeng Zhang
- School of Physics, National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China
| | - Shuxia Tao
- Materials Simulation and Modelling, Department of Applied Physics, Eindhoven University of Technology, Eindhoven, 5600 MB, The Netherlands
| | - Weihua Zhang
- College of Engineering and Applied Sciences, Nanjing University, Nanjing, 210093, China
| | - Min Xiao
- School of Physics, National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China
- Department of Physics, University of Arkansas, Fayetteville, AR 72701, USA
| | - Xiaoyong Wang
- School of Physics, National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China
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16
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Wang C, Qu D, Zhou B, Shang C, Zhang X, Tu Y, Huang W. Self-Healing Behavior of the Metal Halide Perovskites and Photovoltaics. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2307645. [PMID: 37770384 DOI: 10.1002/smll.202307645] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Indexed: 09/30/2023]
Abstract
Perovskite solar cells have achieved rapid progress in the new-generation photovoltaic field, but the commercialization lags behind owing to the device stability issue under operational conditions. Ultimately, the instability issue is attributed to the soft lattice of ionic perovskite crystal. In brief, metal halide perovskite materials are susceptible to structural instability processes, including phase segregation, component loss, lattice distortion, and fatigue failure under harsh external stimuli such as high humidity, strong irradiation, wide thermal cycles, and large stress. Developing self-healing perovskites to further improve the unsatisfactory operational stability of their photoelectric devices under harsh stimuli has become a cutting-edge hotspot in this field. This self-healing behavior needs to be studied more comprehensively. Therefore, the self-healing behavior of the metal halide perovskites and photovoltaics is classified and summarized in this review. By discussing recent advances, underlying mechanisms, strategies, and existing challenges, this review provides perspectives on self-healing of perovskite solar cells in the future.
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Affiliation(s)
- Chenyun Wang
- Frontiers Science Center for Flexible Electronics (FSCFE), Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials and Engineering (IBME), Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, China
| | - Du Qu
- Frontiers Science Center for Flexible Electronics (FSCFE), Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials and Engineering (IBME), Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, China
| | - Bin Zhou
- Frontiers Science Center for Flexible Electronics (FSCFE), Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials and Engineering (IBME), Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, China
| | - Chuanzhen Shang
- Frontiers Science Center for Flexible Electronics (FSCFE), Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials and Engineering (IBME), Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, China
| | - Xinyue Zhang
- Frontiers Science Center for Flexible Electronics (FSCFE), Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials and Engineering (IBME), Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, China
| | - Yongguang Tu
- Frontiers Science Center for Flexible Electronics (FSCFE), Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials and Engineering (IBME), Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, China
- Key laboratory of Flexible Electronics of Zhejiang Provience, Ningbo Institute of Northwestern Polytechnical University, 218 Qingyi Road, Ningbo, 315103, China
| | - Wei Huang
- Frontiers Science Center for Flexible Electronics (FSCFE), Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials and Engineering (IBME), Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, China
- Key Laboratory of Flexible Electronics (KLoFE) and Institution of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing, Jiangsu, 211816, China
- Key Laboratory for Organic Electronics and Information Displays (KLOEID) and Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, Nanjing, Jiangsu, 210023, China
- Key laboratory of Flexible Electronics of Zhejiang Provience, Ningbo Institute of Northwestern Polytechnical University, 218 Qingyi Road, Ningbo, 315103, China
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17
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Niu K, Wang C, Zeng J, Wang Z, Liu Y, Wang L, Li C, Jin Y. Ion Migration in Lead-Halide Perovskites: Cation Matters. J Phys Chem Lett 2024; 15:1006-1018. [PMID: 38298156 DOI: 10.1021/acs.jpclett.3c03451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2024]
Abstract
Metal halide perovskites exhibit remarkable properties for optoelectronic applications, yet their susceptibility to ion migration poses challenges for device stability. Previous research has predominantly focused on the migration of the halide ions. However, the migration of cations, which also has a significant influence on the device performance, is largely overlooked. In this Perspective, we review the migration of cations and their impacts on perovskite materials and devices. Special attention shall be devoted to recent insights into the migration of L-site organic cations in 2D/3D perovskites. We outline inspirations and directions for further research into the cation migration of perovskites, highlighting new possibilities in advancing perovskite optoelectronics.
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Affiliation(s)
- Kai Niu
- State Key Laboratory of Silicon and Advanced Semiconductor Materials, Key Laboratory of Excited-State Materials of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou 310058, China
| | - Chenyang Wang
- State Key Laboratory of Silicon and Advanced Semiconductor Materials, Key Laboratory of Excited-State Materials of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou 310058, China
| | - Jiejun Zeng
- State Key Laboratory of Silicon and Advanced Semiconductor Materials, Key Laboratory of Excited-State Materials of Zhejiang Province, School of Material Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Zirui Wang
- Key Laboratory of Excited-State Materials of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou 310058, China
| | - Yang Liu
- State Key Laboratory of Silicon and Advanced Semiconductor Materials, Key Laboratory of Excited-State Materials of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou 310058, China
- Wenzhou Key Laboratory of Novel Optoelectronic and Nano Materials, Institute of Wenzhou, Zhejiang University, Wenzhou 325006, China
| | - Linjun Wang
- Key Laboratory of Excited-State Materials of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou 310058, China
| | - Cheng Li
- School of Electronic Science and Engineering, Xiamen University, Xiamen 361005, P. R. China
- Future Display Institute of Xiamen, Xiamen 361005, P. R. China
| | - Yizheng Jin
- State Key Laboratory of Silicon and Advanced Semiconductor Materials, Key Laboratory of Excited-State Materials of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou 310058, China
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18
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Afre RA, Pugliese D. Perovskite Solar Cells: A Review of the Latest Advances in Materials, Fabrication Techniques, and Stability Enhancement Strategies. MICROMACHINES 2024; 15:192. [PMID: 38398920 PMCID: PMC10890723 DOI: 10.3390/mi15020192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 01/23/2024] [Accepted: 01/25/2024] [Indexed: 02/25/2024]
Abstract
Perovskite solar cells (PSCs) are gaining popularity due to their high efficiency and low-cost fabrication. In recent decades, noticeable research efforts have been devoted to improving the stability of these cells under ambient conditions. Moreover, researchers are exploring new materials and fabrication techniques to enhance the performance of PSCs under various environmental conditions. The mechanical stability of flexible PSCs is another area of research that has gained significant attention. The latest research also focuses on developing tin-based PSCs that can overcome the challenges associated with lead-based perovskites. This review article provides a comprehensive overview of the latest advances in materials, fabrication techniques, and stability enhancement strategies for PSCs. It discusses the recent progress in perovskite crystal structure engineering, device construction, and fabrication procedures that has led to significant improvements in the photo conversion efficiency of these solar devices. The article also highlights the challenges associated with PSCs such as their poor stability under ambient conditions and discusses various strategies employed to enhance their stability. These strategies include the use of novel materials for charge transport layers and encapsulation techniques to protect PSCs from moisture and oxygen. Finally, this article provides a critical assessment of the current state of the art in PSC research and discusses future prospects for this technology. This review concludes that PSCs have great potential as a low-cost alternative to conventional silicon-based solar cells but require further research to improve their stability under ambient conditions in view of their definitive commercialization.
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Affiliation(s)
- Rakesh A. Afre
- Centre of Excellence in Nanotechnology (CoEN), Faculty of Engineering, Assam down town University (AdtU), Guwahati 781026, Assam, India;
| | - Diego Pugliese
- National Institute of Metrological Research (INRiM), Strada delle Cacce 91, 10135 Torino, Italy
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19
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Chen J, Lou YH, Wang ZK. Characterizing Spatial and Energetic Distributions of Trap States Toward Highly Efficient Perovskite Photovoltaics. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2305064. [PMID: 37635401 DOI: 10.1002/smll.202305064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 07/15/2023] [Indexed: 08/29/2023]
Abstract
Due to their greater opt electric performance, perovskite photovoltaics (PVs) present huge potential to be commercialized. Perovskite PV's high theoretical efficiency expands the available development area. The passivation of defects in perovskite films is crucial for approaching the theoretical limit. In addition to creating efficient passivation techniques, it is essential to direct the passivation approach by getting precise and real-time information on the trap states through measurements. Therefore, it is necessary to establish quantitative characterization methods for the trap states in energy and 3D spaces. The authors cover the characterization of the spatial and energy distributions of trap states in this article with an eye toward high-efficiency perovskite photovoltaics. After going over the strategies that have been created for characterizing and evaluating trap states, the authors will concentrate on how to direct the creative development of characterization techniques for trap states assessment and highlight the opportunities and challenges of future development. The 3D space and energy distribution mappings of trap states are anticipated to be realized. The review will give key guiding importance for further approaching the theoretical efficiency of perovskite photovoltaics, offering some future research direction and technological assistance for the development of appropriate targeted passivation technologies.
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Affiliation(s)
- Jing Chen
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, 215123, China
| | - Yan-Hui Lou
- College of Energy, Soochow Institute for Energy and Materials Innovations, Soochow University, Suzhou, 215006, China
| | - Zhao-Kui Wang
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, 215123, China
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20
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Zhong Y, Yang J, Wang X, Liu Y, Cai Q, Tan L, Chen Y. Inhibition of Ion Migration for Highly Efficient and Stable Perovskite Solar Cells. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2302552. [PMID: 37067957 DOI: 10.1002/adma.202302552] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 04/13/2023] [Indexed: 06/19/2023]
Abstract
In recent years, organic-inorganic halide perovskites are now emerging as the most attractive alternatives for next-generation photovoltaic devices, due to their excellent optoelectronic characteristics and low manufacturing cost. However, the resultant perovskite solar cells (PVSCs) are intrinsically unstable owing to ion migration, which severely impedes performance enhancement, even with device encapsulation. There is no doubt that the investigation of ion migration and the summarization of recent advances in inhibition strategies are necessary to develop "state-of-the-art" PVSCs with high intrinsic stability for accelerated commercialization. This review systematically elaborates on the generation and fundamental mechanisms of ion migration in PVSCs, the impact of ion migration on hysteresis, phase segregation, and operational stability, and the characterizations for ion migration in PVSCs. Then, many related works on the strategies for inhibiting ion migration toward highly efficient and stable PVSCs are summarized. Finally, the perspectives on the current obstacles and prospective strategies for inhibition of ion migration in PVSCs to boost operational stability and meet all of the requirements for commercialization success are summarized.
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Affiliation(s)
- Yang Zhong
- College of Chemistry and Chemical Engineering/Institute of Polymers and Energy Chemistry (IPEC), Nanchang University, 999 Xuefu Avenue, Nanchang, 330031, China
| | - Jia Yang
- College of Chemistry and Chemical Engineering/Institute of Polymers and Energy Chemistry (IPEC), Nanchang University, 999 Xuefu Avenue, Nanchang, 330031, China
| | - Xueying Wang
- College of Chemistry and Chemical Engineering/Institute of Polymers and Energy Chemistry (IPEC), Nanchang University, 999 Xuefu Avenue, Nanchang, 330031, China
| | - Yikun Liu
- College of Chemistry and Chemical Engineering/Institute of Polymers and Energy Chemistry (IPEC), Nanchang University, 999 Xuefu Avenue, Nanchang, 330031, China
| | - Qianqian Cai
- College of Chemistry and Chemical Engineering/Institute of Polymers and Energy Chemistry (IPEC), Nanchang University, 999 Xuefu Avenue, Nanchang, 330031, China
| | - Licheng Tan
- College of Chemistry and Chemical Engineering/Institute of Polymers and Energy Chemistry (IPEC), Nanchang University, 999 Xuefu Avenue, Nanchang, 330031, China
- Peking University Yangtze Delta Institute of Optoelectronics, Nantong, 226010, China
| | - Yiwang Chen
- College of Chemistry and Chemical Engineering/Institute of Polymers and Energy Chemistry (IPEC), Nanchang University, 999 Xuefu Avenue, Nanchang, 330031, China
- National Engineering Research Center for Carbohydrate Synthesis/Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang, 330022, China
- College of Chemistry and Chemical Engineering, Gannan Normal University, Ganzhou, 341000, China
- Peking University Yangtze Delta Institute of Optoelectronics, Nantong, 226010, China
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21
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Zhang K, Zhang L, Saravana Karthikeyan SKS, Kong CY, Zhang F, Guo X, Dang NN, Ramaraj SG, Liu X. Structural, electronic, optical, elastic, thermodynamic and thermal transport properties of Cs 2AgInCl 6 and Cs 2AgSbCl 6 double perovskite semiconductors using a first-principles study. Phys Chem Chem Phys 2023; 25:31848-31868. [PMID: 37968998 DOI: 10.1039/d3cp03795a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2023]
Abstract
In this study, we employ the framework of first-principles density functional theory (DFT) computations to investigate the physical, electrical, bandgap and thermal conductivity of Cs2AgInCl6-CAIC (type I) and Cs2AgSbCl6-CASC (type II) using the GGA-PBE method. CAIC possesses a direct band gap energy of 1.812 eV, while CASC demonstrates an indirect band gap energy of 0.926 eV. The CAIC and CASC exhibit intriguingly reduced thermal conductivity, which can be attributed to the notable reduction in their respective Debye temperatures, measuring 182 K and 135 K, respectively. The Raman active modes computed under ambient conditions have been compared with real-world data, showing excellent agreement. The thermal conductivity values of CAIC and CASC compounds exhibit quantum mechanical characteristics, with values of 0.075 and 0.25 W m-1 K-1, respectively, at 300 K. It is foreseen that these outcomes will generate investigations concerning phosphors and diodes that rely on single emitters, with the aim of advancing lighting and display technologies in the forthcoming generations.
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Affiliation(s)
- Keqing Zhang
- School of Chemical Engineering, Henan Technical Institute, Zhengzhou, Henan, 450042, P. R. China
| | - Lijun Zhang
- School of Chemical Engineering, Henan Technical Institute, Zhengzhou, Henan, 450042, P. R. China
| | - S K S Saravana Karthikeyan
- Department of Environment and Energy System, Graduate School of Science and Technology, Shizuoka University, 3-5-1 Johoku, Naka-ku, Hamamatsu 432-8561, Japan
| | - Chang Yi Kong
- Department of Environment and Energy System, Graduate School of Science and Technology, Shizuoka University, 3-5-1 Johoku, Naka-ku, Hamamatsu 432-8561, Japan
- Department of Applied Chemistry and Biochemical Engineering, Faculty of Engineering, Shizuoka University, 3-5-1 Johoku, Naka-ku, Hamamatsu 432-8561, Japan
| | - Fuchun Zhang
- School of Physics and Electronic Information, Yan'an University, Yan'an, 716000, China
| | - Xiang Guo
- Science and Technology on Aerospace Chemical Power Laboratory, Hubei Institute of Aerospace Chemotechnology, Xiangyang 441003, Hubei, China.
| | - Nam Nguyen Dang
- Future Materials & Devices Lab., Institute of Fundamental and Applied Sciences, Duy Tan University, Ho Chi Minh City, Vietnam
- The Faculty of Environmental and Chemical Engineering, Duy Tan University, Danang, Vietnam
| | - Sankar Ganesh Ramaraj
- Department of Bioengineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo 113-8656, Japan.
- Department of Materials Physics, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences (SIMTS), Thandalam, Chennai - 602105, Tamilnadu, India
| | - Xinghui Liu
- Science and Technology on Aerospace Chemical Power Laboratory, Hubei Institute of Aerospace Chemotechnology, Xiangyang 441003, Hubei, China.
- Division of Research and Development, Lovely Professional University, Phagwara, 144411, India
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22
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Wang H, Bao Y, Li J, Li D, An M, Tang L, Li J, Tang H, Chi Y, Xu J, Yang Y. Highly Anisotropic Polarization Induced by Electrical Poling in Single-Crystalline All-Inorganic Perovskite Nanoplates. J Phys Chem Lett 2023; 14:9943-9950. [PMID: 37903345 DOI: 10.1021/acs.jpclett.3c02394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2023]
Abstract
The coupled ionic and electronic transport in halide perovskites opens up new possibilities for semiconductor iontronic devices beyond solar cells. Nevertheless, the fundamental understanding of ionic behavior at the microscale remains vague, largely because of the inhomogeneity in polycrystalline thin films. Here, we show that the ion dynamics in single-crystalline perovskite nanoplates (NPs) are significantly different and that an external bias may induce highly anisotropic ionic transport in the NPs, thereby leading to a greatly enhanced local electric field. Using modified scanning photocurrent microscopy (SPCM), the origin of the photocurrent is pinpointed to the cathode region of the NP device, where subsequent energy dispersive spectroscopy (EDS) characterization confirms a large accumulation of halogen vacancies. In addition, the Kelvin probe force microscopy (KPFM) measurement demonstrates a strong built-in electric field within a submicron length near the cathode, which alters the local electronic structure for efficient photo carrier separation. Such field-induced ionic behavior deepens the understanding of ion dynamics in perovskites and promotes scale-down of perovskite micro- and nanoiontronic and ion-optoelectronic devices.
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Affiliation(s)
- Hengshan Wang
- School of Microelectronics, Dalian University of Technology, No. 321 Tuqiang Road, Dalian 116620, China
| | - Yanan Bao
- School of Microelectronics, Dalian University of Technology, No. 321 Tuqiang Road, Dalian 116620, China
| | - Jing Li
- School of Microelectronics, Dalian University of Technology, No. 321 Tuqiang Road, Dalian 116620, China
- Key Laboratory of Materials Modification by Laser, Ion, and Electron Beams (Ministry of Education), School of Physics, Dalian University of Technology, No. 2 Linggong Road, Dalian 116024, China
| | - Dongwen Li
- Jilin Provincial Key Laboratory of Architectural Electricity & Comprehensive Energy Saving, School of Electrical Engineering and Computer, Jilin Jianzhu University, Changchun 130118, China
| | - Meiqi An
- School of Microelectronics, Dalian University of Technology, No. 321 Tuqiang Road, Dalian 116620, China
| | - Lingzhi Tang
- School of Microelectronics, Dalian University of Technology, No. 321 Tuqiang Road, Dalian 116620, China
| | - Jianliang Li
- School of Microelectronics, Dalian University of Technology, No. 321 Tuqiang Road, Dalian 116620, China
| | - Huayi Tang
- School of Microelectronics, Dalian University of Technology, No. 321 Tuqiang Road, Dalian 116620, China
| | - Yaodan Chi
- Jilin Provincial Key Laboratory of Architectural Electricity & Comprehensive Energy Saving, School of Electrical Engineering and Computer, Jilin Jianzhu University, Changchun 130118, China
| | - Jiao Xu
- School of Microelectronics, Dalian University of Technology, No. 321 Tuqiang Road, Dalian 116620, China
| | - Yiming Yang
- School of Microelectronics, Dalian University of Technology, No. 321 Tuqiang Road, Dalian 116620, China
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23
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Liu J, Zhu C, Pols M, Zhang Z, Hu F, Wang L, Zhang C, Liu Z, Tao S, Xiao M, Wang X. Discrete Elemental Distributions inside a Single Mixed-Halide Perovskite Nanocrystal for the Self-Assembly of Multiple Quantum-Light Sources. NANO LETTERS 2023; 23:10089-10096. [PMID: 37890167 DOI: 10.1021/acs.nanolett.3c03761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/29/2023]
Abstract
An in-depth understanding of the structure-property relationships in semiconductor mixed-halide perovskites is critical for their potential applications in various light-absorbing and light-emitting optoelectronic devices. Here we show that during the crystal growth of mixed-halide CsPbBr1.2I1.8 nanocrystals (NCs), abundant Ruddlesden-Popper (RP) plane stacking faults are formed to release the lattice strain. These RP planes hinder the exchange of halide species across them, resulting in the presence of multiple nanodomains with discrete mixed-halide compositions inside a single CsPbBr1.2I1.8 NC. Photoluminescence peaks from these pre-segregated nanodomains, whose correlated intensity and wavelength variations signify the interactions of coupled quantum dots within a single CsPbBr1.2I1.8 NC, can be simultaneously resolved at cryogenic temperature. Our findings thus point to a fascinating scenario in which a semiconductor nanostructure can be further divided into multiple quantum-light sources, the interaction and manipulation of which will promote novel photophysics to facilitate their potential applications in quantum information technologies.
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Affiliation(s)
- Jinqiu Liu
- National Laboratory of Solid State Microstructures, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
| | - Chao Zhu
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, and School of Electronic Science and Engineering, Southeast University, Nanjing 210096, China
| | - Mike Pols
- Materials Simulation & Modelling, Department of Applied Physics, Eindhoven University of Technology, Eindhoven 5600 MB, The Netherlands
| | - Zhen Zhang
- National Laboratory of Solid State Microstructures, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
| | - Fengrui Hu
- College of Engineering and Applied Sciences and MOE Key Laboratory of Intelligent Optical Sensing and Manipulation, Nanjing University, Nanjing 210093, China
| | - Lin Wang
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Nanjing Tech University, Nanjing 211816, China
| | - Chunfeng Zhang
- National Laboratory of Solid State Microstructures, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
| | - Zheng Liu
- School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798
| | - Shuxia Tao
- Materials Simulation & Modelling, Department of Applied Physics, Eindhoven University of Technology, Eindhoven 5600 MB, The Netherlands
| | - Min Xiao
- National Laboratory of Solid State Microstructures, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
- Department of Physics, University of Arkansas, Fayetteville, Arkansas 72701, United States
| | - Xiaoyong Wang
- National Laboratory of Solid State Microstructures, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
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24
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Orr KWP, Diao J, Lintangpradipto MN, Batey DJ, Iqbal AN, Kahmann S, Frohna K, Dubajic M, Zelewski SJ, Dearle AE, Selby TA, Li P, Doherty TAS, Hofmann S, Bakr OM, Robinson IK, Stranks SD. Imaging Light-Induced Migration of Dislocations in Halide Perovskites with 3D Nanoscale Strain Mapping. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2305549. [PMID: 37735999 DOI: 10.1002/adma.202305549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 09/01/2023] [Indexed: 09/23/2023]
Abstract
In recent years, halide perovskite materials have been used to make high-performance solar cells and light-emitting devices. However, material defects still limit device performance and stability. Here, synchrotron-based Bragg coherent diffraction imaging is used to visualize nanoscale strain fields, such as those local to defects, in halide perovskite microcrystals. Significant strain heterogeneity within MAPbBr3 (MA = CH3 NH3 + ) crystals is found in spite of their high optoelectronic quality, and both 〈100〉 and 〈110〉 edge dislocations are identified through analysis of their local strain fields. By imaging these defects and strain fields in situ under continuous illumination, dramatic light-induced dislocation migration across hundreds of nanometers is uncovered. Further, by selectively studying crystals that are damaged by the X-ray beam, large dislocation densities and increased nanoscale strains are correlated with material degradation and substantially altered optoelectronic properties assessed using photoluminescence microscopy measurements. These results demonstrate the dynamic nature of extended defects and strain in halide perovskites, which will have important consequences for device performance and operational stability.
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Affiliation(s)
- Kieran W P Orr
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Philippa Fawcett Drive, Cambridge, CB3 0AS, UK
- Department of Physics, Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK
| | - Jiecheng Diao
- London Centre for Nanotechnology, University College London, London, WC1E 6BT, UK
| | - Muhammad Naufal Lintangpradipto
- KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering (PSE), King Abdullah University of Science and Technology (KAUST), 23955-6900, Thuwal, Kingdom of Saudi Arabia
| | - Darren J Batey
- Diamond Light Source, Harwell Science and Innovation Campus, Fermi Ave, Didcot, OX11 0DE, UK
| | - Affan N Iqbal
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Philippa Fawcett Drive, Cambridge, CB3 0AS, UK
- Department of Physics, Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK
| | - Simon Kahmann
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Philippa Fawcett Drive, Cambridge, CB3 0AS, UK
- Department of Physics, Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK
| | - Kyle Frohna
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Philippa Fawcett Drive, Cambridge, CB3 0AS, UK
- Department of Physics, Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK
| | - Milos Dubajic
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Philippa Fawcett Drive, Cambridge, CB3 0AS, UK
| | - Szymon J Zelewski
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Philippa Fawcett Drive, Cambridge, CB3 0AS, UK
- Department of Physics, Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK
| | - Alice E Dearle
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Philippa Fawcett Drive, Cambridge, CB3 0AS, UK
- Department of Physics, Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK
- Department of Engineering, University of Cambridge, Cambridge, CB2 1PZ, UK
| | - Thomas A Selby
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Philippa Fawcett Drive, Cambridge, CB3 0AS, UK
| | - Peng Li
- Diamond Light Source, Harwell Science and Innovation Campus, Fermi Ave, Didcot, OX11 0DE, UK
| | - Tiarnan A S Doherty
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Philippa Fawcett Drive, Cambridge, CB3 0AS, UK
- Department of Physics, Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK
- Department of Materials Science & Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge, CB3 0FS, UK
| | - Stephan Hofmann
- Department of Engineering, University of Cambridge, Cambridge, CB2 1PZ, UK
| | - Osman M Bakr
- KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering (PSE), King Abdullah University of Science and Technology (KAUST), 23955-6900, Thuwal, Kingdom of Saudi Arabia
| | - Ian K Robinson
- London Centre for Nanotechnology, University College London, London, WC1E 6BT, UK
- Condensed Matter Physics and Materials Science Department, Brookhaven National Lab, Upton, New York, 11793, USA
| | - Samuel D Stranks
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Philippa Fawcett Drive, Cambridge, CB3 0AS, UK
- Department of Physics, Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK
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25
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Akrami F, Jiang F, Giridharagopal R, Ginger DS. Kinetic Suppression of Photoinduced Halide Migration in Wide Bandgap Perovskites via Surface Passivation. J Phys Chem Lett 2023; 14:9310-9315. [PMID: 37818819 DOI: 10.1021/acs.jpclett.3c02570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/13/2023]
Abstract
In this work, we study the kinetics of photoinduced halide migration in FA0.8Cs0.2Pb(I0.8Br0.2)3 wide (∼1.69 eV) bandgap perovskites and show that halide migration slows down following surface passivation with (3-aminopropyl) trimethoxysilane (APTMS). We use scanning Kelvin probe microscopy (SKPM) to probe the contact potential difference (CPD) shift under illumination and the kinetics of surface potential relaxation in the dark. Our results show that APTMS-passivated perovskites exhibit a smaller CPD shift under illumination and a slower surface potential relaxation in the dark. We compare the evolution of the photoluminescence spectra of APTMS-passivated and unpassivated perovskites under illumination. We find that APTMS-passivated perovskites exhibit more than 5 times slower photoluminescence red-shift, consistent with the slower surface potential relaxation as observed by SKPM. These observations provide evidence for kinetic suppression of photoinduced halide migration in APTMS-passivated samples, likely due to reduced halide vacancy densities, opening avenues to more efficient and stable devices.
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Affiliation(s)
- Farhad Akrami
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Fangyuan Jiang
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Rajiv Giridharagopal
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - David S Ginger
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
- Physical Sciences Division, Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
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26
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Cao M, Ji W, Chao C, Li J, Dai F, Fan X. Recent Advances in UV-Cured Encapsulation for Stable and Durable Perovskite Solar Cell Devices. Polymers (Basel) 2023; 15:3911. [PMID: 37835960 PMCID: PMC10575197 DOI: 10.3390/polym15193911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 09/10/2023] [Accepted: 09/14/2023] [Indexed: 10/15/2023] Open
Abstract
The stability and durability of perovskite solar cells (PSCs) are two main challenges retarding their industrial commercialization. The encapsulation of PSCs is a critical process that improves the stability of PSC devices for practical applications, and intrinsic stability improvement relies on materials optimization. Among all encapsulation materials, UV-curable resins are promising materials for PSC encapsulation due to their short curing time, low shrinkage, and good adhesion to various substrates. In this review, the requirements for PSC encapsulation materials and the advantages of UV-curable resins are firstly critically assessed based on a discussion of the PSC degradation mechanism. Recent advances in improving the encapsulation performance are reviewed from the perspectives of molecular modification, encapsulation materials, and corresponding architecture design while highlighting excellent representative works. Finally, the concluding remarks summarize promising research directions and remaining challenges for the use of UV-curable resins in encapsulation. Potential solutions to current challenges are proposed to inspire future work devoted to transitioning PSCs from the lab to practical application.
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Affiliation(s)
- Mengyu Cao
- SINOPEC (Beijing) Research Institute of Chemical Industry Co., Ltd., Beijing 100013, China; (M.C.); (W.J.); (J.L.)
| | - Wenxi Ji
- SINOPEC (Beijing) Research Institute of Chemical Industry Co., Ltd., Beijing 100013, China; (M.C.); (W.J.); (J.L.)
| | - Cong Chao
- Beijing Key Laboratory of Emission Surveillance and Control for Thermal Power Generation, North China Electric Power University, Beijing 102206, China;
| | - Ji Li
- SINOPEC (Beijing) Research Institute of Chemical Industry Co., Ltd., Beijing 100013, China; (M.C.); (W.J.); (J.L.)
| | - Fei Dai
- Laboratory of Distributed Energy System and Renewable Energy, Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China
| | - Xianfeng Fan
- Institute for Materials and Processes, School of Engineering, The University of Edinburgh, Edinburgh EH9 3FB, UK
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27
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Gegevičius R, Elkhouly K, Franckevičius M, Chmeliov J, Goldberg I, Gehlhaar R, Qiu W, Genoe J, Heremans P, Gulbinas V. Electric Field-Induced Quenching of MAPbI 3 Photoluminescence in PeLED Architecture. ACS APPLIED MATERIALS & INTERFACES 2023; 15:42784-42791. [PMID: 37647415 PMCID: PMC11007676 DOI: 10.1021/acsami.3c05880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Accepted: 08/18/2023] [Indexed: 09/01/2023]
Abstract
Photoluminescence (PL) measurements are a widely used technique for the investigation of perovskite-based materials and devices. Although electric field-induced PL quenching provides additional useful information, this phenomenon is quite complex and not yet clearly understood. Here, we address the PL quenching of methylammonium lead iodide (MAPbI3) perovskite in a light-emitting diode (PeLED) architecture. We distinguish two quenching mechanisms: (a) indirect quenching by slow irreversible or partially reversible material changes that occur gradually under the applied light and electric field and (b) direct quenching by the influence of the electric field on the charge carrier densities, their spatial distributions, and radiative recombination rates. Direct quenching, observed under the abrupt application of negative voltage, causes a decrease of the PL intensity. However, the PL intensity then partially recovers within tens of milliseconds as mobile ions screen the internal electric field. The screening time increases to hundreds of seconds at low temperatures, indicating activation energies for ion motion of about 80 meV. On the other hand, ultrafast time-resolved PL measurements revealed two main phases of direct quenching: an instantaneous reduction in the radiative carrier recombination rate, which we attribute to the electron and hole displacement within individual perovskite grains, followed by a second phase lasting hundreds of picoseconds, which is due to the charge carrier extraction and spatial separation of electron and hole "clouds" within the entire perovskite layer thickness.
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Affiliation(s)
- Rokas Gegevičius
- Department
of Molecular Compound Physics, Center for
Physical Sciences and Technology, Saulėtekio Avenue 3, LT-10257 Vilnius, Lithuania
| | - Karim Elkhouly
- Department
of Electrical Engineering, KU Leuven, Kasteelpark, Arenberg, 3001 Leuven, Belgium
- IMEC, Kapeldreef 75, 3001 Leuven, Belgium
| | - Marius Franckevičius
- Department
of Molecular Compound Physics, Center for
Physical Sciences and Technology, Saulėtekio Avenue 3, LT-10257 Vilnius, Lithuania
| | - Jevgenij Chmeliov
- Department
of Molecular Compound Physics, Center for
Physical Sciences and Technology, Saulėtekio Avenue 3, LT-10257 Vilnius, Lithuania
- Institute
of Chemical Physics, Faculty of Physics, Vilnius University, Saulėtekio Avenue 9, LT-10222 Vilnius, Lithuania
| | - Iakov Goldberg
- Department
of Electrical Engineering, KU Leuven, Kasteelpark, Arenberg, 3001 Leuven, Belgium
- IMEC, Kapeldreef 75, 3001 Leuven, Belgium
| | | | | | - Jan Genoe
- Department
of Electrical Engineering, KU Leuven, Kasteelpark, Arenberg, 3001 Leuven, Belgium
- IMEC, Kapeldreef 75, 3001 Leuven, Belgium
| | - Paul Heremans
- Department
of Electrical Engineering, KU Leuven, Kasteelpark, Arenberg, 3001 Leuven, Belgium
- IMEC, Kapeldreef 75, 3001 Leuven, Belgium
| | - Vidmantas Gulbinas
- Department
of Molecular Compound Physics, Center for
Physical Sciences and Technology, Saulėtekio Avenue 3, LT-10257 Vilnius, Lithuania
- Institute
of Chemical Physics, Faculty of Physics, Vilnius University, Saulėtekio Avenue 9, LT-10222 Vilnius, Lithuania
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28
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Ghimire S, Khatun MF, Sachith BM, Okamoto T, Sobhanan J, Subrahmanyam C, Biju V. Highly Luminescent and Stable Halide Perovskite Nanocrystals by Interfacial Defect Passivation and Amphiphilic Ligand Capping. ACS APPLIED MATERIALS & INTERFACES 2023; 15:41081-41091. [PMID: 37581484 DOI: 10.1021/acsami.3c05868] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/16/2023]
Abstract
Halide vacancies cause lattice degradation and nonradiative losses in halide perovskites. In this study, we strategically fill bromide vacancies in CsPbBr3 perovskite nanocrystals with NaBr, KBr, or CsBr at the organic-aqueous interface for hydrophobic ligand-capped nanocrystals or in a polar solvent (2-propanol) for amphiphilic ligand-capped nanocrystals. Energy-dispersive X-ray spectra, powder X-ray diffraction data, and scanning transmission electron microscopy images help us confirm vacancy filling and the structures of samples. The bromide salts increase the photoluminescence quantum yield (98 ± 2%) of CsPbBr3 by decreasing the nonradiative decay rate. Single-particle studies show the quantum yield increase originates from the poorly luminescent nanocrystals becoming highly luminescent after filling vacancies. Furthermore, we tune the optical band gap (ultraviolet-visible-near-infrared) of the hydrophobic ligand-capped nanocrystals by halide exchange at the toluene-water interface using saturated NaCl or NaI solutions, which completes in about 60 min under continuous mixing. In contrast, the amphiphilic ligand accelerates the halide exchange in 2-propanol, suggesting ambipolar functional groups speed up the ion-exchange reaction. The bromide vacancy-filled or halide-exchanged samples in a toluene-water biphasic solvent show higher stability than amphiphilic ligand-capped samples in 2-propanol. This strategy of defect passivation, ion exchange, and ligand chemistry to improve quantum yields and tune band gaps of halide perovskite nanocrystals can be promising for designing stable and water-soluble perovskite samples for solar cells, light-emitting diodes, photodetectors, and photocatalysts.
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Affiliation(s)
- Sushant Ghimire
- Research Institute for Electronic Science, Hokkaido University, Sapporo 001-0020, Hokkaido, Japan
| | - Most Farida Khatun
- Graduate School of Environmental Science, Hokkaido University, Sapporo 001-0020, Hokkaido, Japan
| | - Bhagyashree M Sachith
- Graduate School of Environmental Science, Hokkaido University, Sapporo 001-0020, Hokkaido, Japan
| | - Takuya Okamoto
- Research Institute for Electronic Science, Hokkaido University, Sapporo 001-0020, Hokkaido, Japan
- Graduate School of Environmental Science, Hokkaido University, Sapporo 001-0020, Hokkaido, Japan
| | - Jeladhara Sobhanan
- Graduate School of Environmental Science, Hokkaido University, Sapporo 001-0020, Hokkaido, Japan
| | - Ch Subrahmanyam
- Department of Chemistry, Indian Institute of Technology Hyderabad, Kandi, 502284 Sangareddy, Telangana, India
| | - Vasudevanpillai Biju
- Research Institute for Electronic Science, Hokkaido University, Sapporo 001-0020, Hokkaido, Japan
- Graduate School of Environmental Science, Hokkaido University, Sapporo 001-0020, Hokkaido, Japan
- Department of Chemistry, Indian Institute of Technology Hyderabad, Kandi, 502284 Sangareddy, Telangana, India
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29
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Ghasemi M, Li X, Tang C, Li Q, Lu J, Du A, Lee J, Appadoo D, Tizei LHG, Pham ST, Wang L, Collins SM, Hou J, Jia B, Wen X. Effective Suppressing Phase Segregation of Mixed-Halide Perovskite by Glassy Metal-Organic Frameworks. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023:e2304236. [PMID: 37616513 DOI: 10.1002/smll.202304236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 08/13/2023] [Indexed: 08/26/2023]
Abstract
Lead mixed-halide perovskites offer tunable bandgaps for optoelectronic applications, but illumination-induced phase segregation can quickly lead to changes in their crystal structure, bandgaps, and optoelectronic properties, especially for the Br-I mixed system because CsPbI3 tends to form a non-perovskite phase under ambient conditions. These behaviors can impact their performance in practical applications. By embedding such mixed-halide perovskites in a glassy metal-organic framework, a family of stable nanocomposites with tunable emission is created. Combining cathodoluminescence with elemental mapping under a transmission electron microscope, this research identifies a direct relationship between the halide composition and emission energy at the nanoscale. The composite effectively inhibits halide ion migration, and consequently, phase segregation even under high-energy illumination. The detailed mechanism, studied using a combination of spectroscopic characterizations and theoretical modeling, shows that the interfacial binding, instead of the nanoconfinement effect, is the main contributor to the inhibition of phase segregation. These findings pave the way to suppress the phase segregation in mixed-halide perovskites toward stable and high-performance optoelectronics.
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Affiliation(s)
- Mehri Ghasemi
- School of Science, RMIT University, Melbourne, VIC, 3000, Australia
| | - Xuemei Li
- School of Chemical Engineering, The University of Queensland, St. Lucia, QLD, 4072, Australia
| | - Cheng Tang
- School of Chemistry and Physics, Centre for Materials Science, Queensland University of Technology, 2 George St, Brisbane City, QLD, 4001, Australia
| | - Qi Li
- Centre for Translational Atomaterials, Swinburne University of Technology, Hawthorn, VIC, 3122, Australia
| | - Junlin Lu
- Centre for Translational Atomaterials, Swinburne University of Technology, Hawthorn, VIC, 3122, Australia
| | - Aijun Du
- School of Chemistry and Physics, Centre for Materials Science, Queensland University of Technology, 2 George St, Brisbane City, QLD, 4001, Australia
| | - Jaeho Lee
- School of Chemical Engineering, The University of Queensland, St. Lucia, QLD, 4072, Australia
| | - Dominique Appadoo
- Australian Synchrotron, 800 Blackburn Rd, Clayton, VIC, 3168, Australia
| | - Luiz H G Tizei
- Université Paris-Saclay, CNRS, Laboratoire de Physique des Solides, 91405, Orsay, France
| | - Sang T Pham
- Bragg Centre for Materials Research, School of Chemical and Process Engineering and School of Chemistry, University of Leeds, LS2 9JT, Leeds, UK
| | - Lianzhou Wang
- School of Chemical Engineering, The University of Queensland, St. Lucia, QLD, 4072, Australia
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia, QLD, 4072, Australia
| | - Sean M Collins
- Bragg Centre for Materials Research, School of Chemical and Process Engineering and School of Chemistry, University of Leeds, LS2 9JT, Leeds, UK
| | - Jingwei Hou
- School of Chemical Engineering, The University of Queensland, St. Lucia, QLD, 4072, Australia
| | - Baohua Jia
- School of Science, RMIT University, Melbourne, VIC, 3000, Australia
| | - Xiaoming Wen
- School of Science, RMIT University, Melbourne, VIC, 3000, Australia
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30
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Wu S, Ma B, Fan H, Hua X, Hu C, Ulbricht M, Qu J. Influence of water quality factors on cake layer 3D structures and water channels during ultrafiltration process. WATER RESEARCH 2023; 242:120226. [PMID: 37364354 DOI: 10.1016/j.watres.2023.120226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 05/28/2023] [Accepted: 06/12/2023] [Indexed: 06/28/2023]
Abstract
The three-dimensional (3D) structure of the cake layer, which could be influenced by water quality factors, plays a significant role in the ultrafiltration (UF) efficiency of water purification. However, it remains challenging to precisely reveal the variation of cake layer 3D structures and water channel characteristics. Herein, we systematically report the variation in the cake layer 3D structure at the nanoscale induced by key water quality factors and reveal its influence on water transport, in particular the abundance of water channels within the cake layer. In comparison with pH and Na+, Ca2+ played more significant role in determining cake layer structures. The sandwich-like cake layer, which was induced by the asynchronous deposition of humic acids and sodium alginate (SA), shifted to an isotropic structure when Ca2+ was present due to the Ca2+ bridging. In comparison with the sandwich-like structure, the isotropic cake layer has higher fractions of free volume (voids) and more water channels, leading to a 147% improvement in the water transport coefficient, 60% reduction in the cake layer resistance, and 21% increase in the final membrane specific flux. Our work elucidates a structure-property relationship where improving the isotropy of the cake layer 3D structure is conducive to the optimization of water channels and water transport within cake layers. This could inspire tailored regulation strategies for cake layers to enhance the UF efficiency of water purification.
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Affiliation(s)
- Siqi Wu
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Baiwen Ma
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China; Lehrstuhl für Technische Chemie II, Universität Duisburg-Essen, Essen 45117, Germany.
| | - Hongwei Fan
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Xin Hua
- Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China; School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Chengzhi Hu
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Mathias Ulbricht
- Lehrstuhl für Technische Chemie II, Universität Duisburg-Essen, Essen 45117, Germany
| | - Jiuhui Qu
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
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31
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Péan E, Davies ML. PEARS: A Web Tool for Fitting Time-Resolved Photoluminescence Decays of Perovskite Materials. J Chem Inf Model 2023; 63:4477-4482. [PMID: 37463067 PMCID: PMC10428210 DOI: 10.1021/acs.jcim.3c00217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Indexed: 07/20/2023]
Abstract
Time-resolved photoluminescence (TRPL) is a powerful tool to investigate charge carrier recombination processes in emissive materials. Perovskite materials are extremely promising for applications in solar cells; however, the interpretation of their TRPL is arduous due to the complicated nature of the recombination processes occurring in these materials. We present here the PErovskite cArrier Recombination Simulator (PEARS) web tool for effortlessly and quickly fitting TRPL of perovskite materials using advanced charge carrier recombination models, allowing for the extraction of recombination rate constants and trap state concentration. PEARS is flexible and can adapt to different situations, by ignoring recombination processes or fixing known parameters (e.g., the doping concentration). The tool is publicly available at https://pears-tool.herokuapp.com.
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Affiliation(s)
- Emmanuel
V. Péan
- SPECIFIC
IKC, Materials Research Centre, College of Engineering, Swansea University Bay Campus, Fabian Way SA1 8EN, Swansea, U.K.
| | - Matthew L. Davies
- SPECIFIC
IKC, Materials Research Centre, College of Engineering, Swansea University Bay Campus, Fabian Way SA1 8EN, Swansea, U.K.
- School
of Chemistry and Physics, University of
KwaZulu-Natal, Durban 03209, RSA
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32
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Zhang X, Zhao X, Wang Z. Polyacrylonitrile Passivation for Enhancing the Optoelectronic Switching Performance of Halide Perovskite Memristor for Image Boolean Logic Applications. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2174. [PMID: 37570491 PMCID: PMC10421001 DOI: 10.3390/nano13152174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 07/19/2023] [Accepted: 07/24/2023] [Indexed: 08/13/2023]
Abstract
For the CH3NH3PbI3-based optoelectronic memristor, the high ion-migration randomness induces high fluctuation in the resistive switching (RS) parameters. Grain boundaries (GBs) are well known as the ion-migration sites due to their low energy barrier. Herein, a polyacrylonitrile (PAN) passivation method is developed to reduce GBs of the CH3NH3PbI3 film and improve the switching uniformity of the memristor. The crystal grain size of CH3NH3PbI3 increases with the addition of PAN, and the corresponding number of GBs is consequently reduced. The fluctuations of the RS parameters of the memristor device are significantly reduced. With the memristor, nonvolatile image sensing, image memory, and image Boolean operations are demonstrated. This work proposes a strategy for developing high-performance CH3NH3PbI3 optoelectronic memristors.
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Affiliation(s)
| | - Xiaoning Zhao
- Key Laboratory of UV-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, Changchun 130024, China
| | - Zhongqiang Wang
- Key Laboratory of UV-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, Changchun 130024, China
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33
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Xu Z, Astridge DD, Kerner RA, Zhong X, Hu J, Hong J, Wisch JA, Zhu K, Berry JJ, Kahn A, Sellinger A, Rand BP. Origins of Photoluminescence Instabilities at Halide Perovskite/Organic Hole Transport Layer Interfaces. J Am Chem Soc 2023; 145:11846-11858. [PMID: 37202123 DOI: 10.1021/jacs.3c03539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Metal halide perovskites are promising for optoelectronic device applications; however, their poor stability under solar illumination remains a primary concern. While the intrinsic photostability of isolated neat perovskite samples has been widely discussed, it is important to explore how charge transport layers─employed in most devices─impact photostability. Herein, we study the effect of organic hole transport layers (HTLs) on light-induced halide segregation and photoluminescence (PL) quenching at perovskite/organic HTL interfaces. By employing a series of organic HTLs, we demonstrate that the HTL's highest occupied molecular orbital energy dictates behavior; furthermore, we reveal the key role of halogen loss from the perovskite and subsequent permeation into organic HTLs, where it acts as a PL quencher at the interface and introduces additional mass transport pathways to facilitate halide phase separation. In doing so, we both reveal the microscopic mechanism of non-radiative recombination at perovskite/organic HTL interfaces and detail the chemical rationale for closely matching the perovskite/organic HTL energetics to maximize solar cell efficiency and stability.
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Affiliation(s)
- Zhaojian Xu
- Department of Electrical and Computer Engineering, Princeton University, Princeton, New Jersey 08544, United States
| | - Daniel D Astridge
- Department of Chemistry, Colorado School of Mines, Golden, Colorado 80401, United States
| | - Ross A Kerner
- National Renewable Energy Laboratory, Golden, Colorado 80401, United States
| | - Xinjue Zhong
- Department of Electrical and Computer Engineering, Princeton University, Princeton, New Jersey 08544, United States
| | - Junnan Hu
- Department of Electrical and Computer Engineering, Princeton University, Princeton, New Jersey 08544, United States
| | - Jisu Hong
- Department of Electrical and Computer Engineering, Princeton University, Princeton, New Jersey 08544, United States
| | - Jesse A Wisch
- Department of Electrical and Computer Engineering, Princeton University, Princeton, New Jersey 08544, United States
| | - Kai Zhu
- National Renewable Energy Laboratory, Golden, Colorado 80401, United States
| | - Joseph J Berry
- National Renewable Energy Laboratory, Golden, Colorado 80401, United States
- Renewable and Sustainable Energy Institute, University of Colorado Boulder, Boulder, Colorado 80309, United States
- Department of Physics, University of Colorado Boulder, Boulder, Colorado 80309, United States
| | - Antoine Kahn
- Department of Electrical and Computer Engineering, Princeton University, Princeton, New Jersey 08544, United States
| | - Alan Sellinger
- Department of Chemistry, Colorado School of Mines, Golden, Colorado 80401, United States
- National Renewable Energy Laboratory, Golden, Colorado 80401, United States
| | - Barry P Rand
- Department of Electrical and Computer Engineering, Princeton University, Princeton, New Jersey 08544, United States
- Andlinger Center for Energy and the Environment, Princeton University, Princeton, New Jersey 08544, United States
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34
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Kim T, Park S, Iyer V, Shaheen B, Choudhry U, Jiang Q, Eichman G, Gnabasik R, Kelley K, Lawrie B, Zhu K, Liao B. Mapping the pathways of photo-induced ion migration in organic-inorganic hybrid halide perovskites. Nat Commun 2023; 14:1846. [PMID: 37012242 PMCID: PMC10070404 DOI: 10.1038/s41467-023-37486-w] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Accepted: 03/20/2023] [Indexed: 04/05/2023] Open
Abstract
Organic-inorganic hybrid perovskites exhibiting exceptional photovoltaic and optoelectronic properties are of fundamental and practical interest, owing to their tunability and low manufacturing cost. For practical applications, however, challenges such as material instability and the photocurrent hysteresis occurring in perovskite solar cells under light exposure need to be understood and addressed. While extensive investigations have suggested that ion migration is a plausible origin of these detrimental effects, detailed understanding of the ion migration pathways remains elusive. Here, we report the characterization of photo-induced ion migration in perovskites using in situ laser illumination inside a scanning electron microscope, coupled with secondary electron imaging, energy-dispersive X-ray spectroscopy and cathodoluminescence with varying primary electron energies. Using methylammonium lead iodide and formamidinium lead iodide as model systems, we observed photo-induced long-range migration of halide ions over hundreds of micrometers and elucidated the transport pathways of various ions both near the surface and inside the bulk of the samples, including a surprising finding of the vertical migration of lead ions. Our study provides insights into ion migration processes in perovskites that can aid perovskite material design and processing in future applications.
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Affiliation(s)
- Taeyong Kim
- Department of Mechanical Engineering, University of California, Santa Barbara, CA, 93106, USA
- Department of Mechanical Engineering, Seoul National University, Seoul, 08826, Republic of Korea
| | - Soyeon Park
- National Renewable Energy Laboratory, Golden, CO, 80401, USA
| | - Vasudevan Iyer
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, 37830, USA
| | - Basamat Shaheen
- Department of Mechanical Engineering, University of California, Santa Barbara, CA, 93106, USA
| | - Usama Choudhry
- Department of Mechanical Engineering, University of California, Santa Barbara, CA, 93106, USA
| | - Qi Jiang
- National Renewable Energy Laboratory, Golden, CO, 80401, USA
| | - Gage Eichman
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, 37830, USA
| | - Ryan Gnabasik
- Department of Mechanical Engineering, University of California, Santa Barbara, CA, 93106, USA
| | - Kyle Kelley
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, 37830, USA
| | - Benjamin Lawrie
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, 37830, USA.
- Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37830, USA.
| | - Kai Zhu
- National Renewable Energy Laboratory, Golden, CO, 80401, USA.
| | - Bolin Liao
- Department of Mechanical Engineering, University of California, Santa Barbara, CA, 93106, USA.
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35
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Barua P, In CM, Lee MJ, Hwang I. Microwave-facilitated crystal growth of defect-passivated triple-cation metal halide perovskites toward efficient solar cells. NANOSCALE 2023; 15:5954-5963. [PMID: 36883549 DOI: 10.1039/d2nr07090a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Structural defects at the surface and within the bulk of perovskite films hinder efficient energy conversion in solar cells due to the loss of charge carriers through non-radiative recombination. Post-passivation approaches have been proposed in an attempt to eliminate surface defects, with bulk defects being rarely studied. Moreover, it is of interest to investigate the difference in the perovskite crystal growth with and without simultaneous defect passivation. Here, we study a new crystal growth strategy to realize high-quality triple-cation perovskite crystals via utilizing microwave irradiation combined with a continuous supply of defect passivators from a reservoir solution of trioctyl-n-phosphine oxide (TOPO). The proposed method facilitates the growth of perovskite crystals with TOPO ligand coordination in the whole film region. Consequently, the processed perovskite film demonstrates distinctive features of significantly suppressed non-radiative recombination, substantial defect reduction and morphological changes compared to the perovskites processed by conventional thermal annealing. The power conversion efficiency is enhanced owing to the improved open-circuit voltage (Voc) and short-circuit current (Jsc). The results of this study are expected to assist in the development of diverse approaches for the control of perovskite crystal growth with in situ defect passivation toward high efficiency in solar cells.
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Affiliation(s)
- Pranta Barua
- Department of Electronic Materials Engineering, Kwangwoon University, Seoul 01897, Republic of Korea.
| | - Chang Min In
- School of Advanced Materials Engineering, Kookmin University, Seoul 02707, Republic of Korea.
| | - Mi Jung Lee
- School of Advanced Materials Engineering, Kookmin University, Seoul 02707, Republic of Korea.
| | - Inchan Hwang
- Department of Electronic Materials Engineering, Kwangwoon University, Seoul 01897, Republic of Korea.
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36
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Ye X, Li C, Jiang J, Zheng X, Han Q, Lin Q, Liu Y, Tao X. Morphology dependent light-induced photoluminescence enhancement of CsPbBr 3 microcrystals. Chem Commun (Camb) 2023; 59:3403-3406. [PMID: 36852483 DOI: 10.1039/d2cc06545b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
Herein, we report a facile method for growing CsPbBr3 cube and prism microcrystals by microspacing in-air sublimation. Morphology-dependent photoluminescence behavior investigation reveals that the CsPbBr3 cubes show higher photoluminescence quantum yield and longer PL lifetime than the prisms. In contrast, CsPbBr3 prisms exhibit more considerable light-induced photoluminescence enhancement.
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Affiliation(s)
- Xin Ye
- State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan 250100, China.
| | - Cuicui Li
- State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan 250100, China.
| | - Jinke Jiang
- State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan 250100, China.
| | - Xiaoxin Zheng
- State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan 250100, China.
| | - Quangxiang Han
- State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan 250100, China.
| | - Qinglian Lin
- State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan 250100, China.
| | - Yang Liu
- State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan 250100, China.
| | - Xutang Tao
- State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan 250100, China.
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37
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Wan S, Li K, Zou M, Hong D, Xie M, Tan H, Scheblykin IG, Tian Y. All-Optical Switching Based on Sub-Bandgap Photoactivation of Charge Trapping in Metal Halide Perovskites. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2209851. [PMID: 36608687 DOI: 10.1002/adma.202209851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 12/27/2022] [Indexed: 06/17/2023]
Abstract
Controllable optical properties are crucial for the application of light-emitting materials in optical devices. In this work, controllable photoluminescence in metal halide perovskite crystals is realized via photoactivation of their defects. It is found that under continuous excitation, the photoluminescence intensity of a CH3 NH3 PbBr3 crystal can be fully controlled by sub-bandgap energy photon illumination. Such optically controllable emission behavior is rather general as it is observed also in CsPbBr3 and other perovskite materials. The switching mechanism is assigned to reversible light-induced activation/deactivation of nonradiative recombination centers, the presence of which relates to an excess of Pb during perovskite synthesis. Given the success of perovskites in photovoltaics and optoelectronics, it is believed that the discovery of green luminescence controlled by red illumination will extend the application scope of perovskites toward optical devices and intelligent control.
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Affiliation(s)
- Sushu Wan
- Key Laboratory of Mesoscopic Chemistry of MOE, Jiangsu Key Laboratory of Vehicle Emissions Control, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu, 210023, China
| | - Ke Li
- Key Laboratory of Mesoscopic Chemistry of MOE, Jiangsu Key Laboratory of Vehicle Emissions Control, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu, 210023, China
| | - Meijun Zou
- Key Laboratory of Mesoscopic Chemistry of MOE, Jiangsu Key Laboratory of Vehicle Emissions Control, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu, 210023, China
| | - Daocheng Hong
- Key Laboratory of Mesoscopic Chemistry of MOE, Jiangsu Key Laboratory of Vehicle Emissions Control, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu, 210023, China
| | - Mingcai Xie
- Key Laboratory of Mesoscopic Chemistry of MOE, Jiangsu Key Laboratory of Vehicle Emissions Control, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu, 210023, China
| | - Hairen Tan
- National Laboratory of Solid State Microstructures, School of Physics, and Collaborative Innovation Center for Advanced Microstructures, Nanjing University, Nanjing, 210093, China
| | - Ivan G Scheblykin
- Chemical Physics and Nano Lund, Lund University, PO Box 118, Lund, 22100, Sweden
| | - Yuxi Tian
- Key Laboratory of Mesoscopic Chemistry of MOE, Jiangsu Key Laboratory of Vehicle Emissions Control, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu, 210023, China
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38
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Zuo L, Li Z, Chen H. Ion Migration and Accumulation in Halide Perovskite Solar Cells
†. CHINESE J CHEM 2023. [DOI: 10.1002/cjoc.202200505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Affiliation(s)
- Lijian Zuo
- State Key Laboratory of Silicon Materials, MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering Zhejiang University Hangzhou Zhejiang 310027 China
- Zhejiang University‐Hangzhou Global Scientific and Technological Innovation Center Hangzhou Zhejiang 310014 China
| | - Zexin Li
- State Key Laboratory of Silicon Materials, MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering Zhejiang University Hangzhou Zhejiang 310027 China
| | - Hongzheng Chen
- State Key Laboratory of Silicon Materials, MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering Zhejiang University Hangzhou Zhejiang 310027 China
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39
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Gao L, Li Q, Sun JL, Yan Q. Gamma-Ray Irradiation Stability of Zero-Dimensional Cs 3Cu 2I 5 Metal Halide Scintillator Single Crystals. J Phys Chem Lett 2023; 14:1165-1173. [PMID: 36715484 DOI: 10.1021/acs.jpclett.3c00104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Zero-dimensional Cs3Cu2I5 is one of the most promising metal halide scintillators due to its large Stokes shift, photoluminescence quantum yields, freedom from toxic elements, and excellent energy spectrum resolution. To unlock the full potential of Cs3Cu2I5 as an effective alternative to traditional scintillators for gamma-ray detection, the irradiation stability of Cs3Cu2I5 single crystals under 60Co gamma rays with a maximum accumulated dose of 800 krad was explored. Although the luminescence mechanism remained unchanged after irradiation, the optical properties of Cs3Cu2I5 single crystals demonstrated a dose-dependent change at low accumulated doses (<600 krad). However, a further increase in the accumulated dose did not lead to more severe degradation and even slight performance recovery occurred. Electron paramagnetic resonance and theoretical calculation results revealed that the irradiation-induced Cs+-related Frenkel defects contribute to performance degradation. These results shed light on the microscopic mechanism of gamma-ray irradiation damage of Cs3Cu2I5 single crystal and provide guidance to their real application.
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Affiliation(s)
- Lei Gao
- Department of Chemistry, Tsinghua University, Beijing100084, China
| | - Qiang Li
- Department of Chemistry, Tsinghua University, Beijing100084, China
| | - Jia-Lin Sun
- Department of Physics, Tsinghua University, Beijing100084, China
| | - Qingfeng Yan
- Department of Chemistry, Tsinghua University, Beijing100084, China
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40
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Ighodalo KO, Chen W, Liang Z, Shi Y, Chu S, Zhang Y, Khan R, Zhou H, Pan X, Ye J, Xiao Z. Negligible Ion Migration in Tin-Based and Tin-Doped Perovskites. Angew Chem Int Ed Engl 2023; 62:e202213932. [PMID: 36353929 DOI: 10.1002/anie.202213932] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Indexed: 11/11/2022]
Abstract
Ion migration is a notorious phenomenon observed in ionic perovskite materials. It causes several severe issues in perovskite optoelectronic devices such as instability, current hysteresis, and phase segregation. Here, we report that, in contrast to lead halide perovskites (LHPs), no ion migration or phase segregation was observed in tin halide perovskites (THPs) under illumination or an electric field. The origin is attributed to a much stronger Sn-halide bond and higher ion migration activation energy (Ea ) in THPs, which remain nearly constant under illumination. We further figured out the threshold Ea for the absence of ion migration to be around 0.65 eV using the CsSny Pb1-y (I0.6 Br0.4 )3 system whose Ea varies with Sn ratios. Our work shows that ion migration does not necessarily exist in all perovskites and suggests metallic doping to be a promising way of stopping ion migration and improving the intrinsic stability of perovskites.
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Affiliation(s)
- Kester O Ighodalo
- CAS Key Laboratory of Strongly-coupled Quantum Matter Physics, Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Wenjing Chen
- CAS Key Laboratory of Strongly-coupled Quantum Matter Physics, Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Zheng Liang
- Key Laboratory of Photovoltaic and Energy Conservation Materials, Institute of Solid-State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, 230031, China
| | - Yongliang Shi
- Center for Spintronics and Quantum Systems, State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
| | - Shenglong Chu
- CAS Key Laboratory of Strongly-coupled Quantum Matter Physics, Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Yihan Zhang
- CAS Key Laboratory of Strongly-coupled Quantum Matter Physics, Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Rashid Khan
- CAS Key Laboratory of Strongly-coupled Quantum Matter Physics, Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Hongmin Zhou
- Instruments Center for Physical Science, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Xu Pan
- Key Laboratory of Photovoltaic and Energy Conservation Materials, Institute of Solid-State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, 230031, China
| | - Jiajiu Ye
- Key Laboratory of Photovoltaic and Energy Conservation Materials, Institute of Solid-State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, 230031, China
| | - Zhengguo Xiao
- CAS Key Laboratory of Strongly-coupled Quantum Matter Physics, Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
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41
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Held V, Mrkyvkova N, Nádaždy P, Vegso K, Vlk A, Ledinský M, Jergel M, Chumakov A, Roth SV, Schreiber F, Siffalovic P. Evolution of Structure and Optoelectronic Properties During Halide Perovskite Vapor Deposition. J Phys Chem Lett 2022; 13:11905-11912. [PMID: 36525260 DOI: 10.1021/acs.jpclett.2c03422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
The efficiency of perovskite-based solar cells has increased dramatically over the past decade to as high as 25%, making them very attractive for commercial use. Vapor deposition is a promising technique that potentially enables fabrication of perovskite solar cells on large areas. However, to implement a large-scale deposition method, understanding and controlling the specific growth mechanisms are essential for the reproducible fabrication of high-quality layers. Here, we study the structural and optoelectronic kinetics of MAPbI3, employing in-situ photoluminescence (PL) spectroscopy and grazing-incidence small/wide-angle X-ray scattering (GI-SAXS/WAXS) simultaneously during perovskite vapor deposition. Such a unique combination of techniques reveals MAPbI3 formation from the early stages and uncovers the morphology, crystallographic structure, and defect density evolution. Furthermore, we show that the nonmonotonous character of PL intensity contrasts with the increasing volume of the perovskite phase during the growth, although bringing valuable information about the presence of defect states.
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Affiliation(s)
- Vladimir Held
- Institute of Physics, Slovak Academy of Sciences, Dúbravská cesta 9, 845 11Bratislava, Slovakia
| | - Nada Mrkyvkova
- Institute of Physics, Slovak Academy of Sciences, Dúbravská cesta 9, 845 11Bratislava, Slovakia
- Center for Advanced Materials Application, Slovak Academy of Sciences, Dúbravská cesta 9, 845 11Bratislava, Slovakia
| | - Peter Nádaždy
- Institute of Physics, Slovak Academy of Sciences, Dúbravská cesta 9, 845 11Bratislava, Slovakia
- Center for Advanced Materials Application, Slovak Academy of Sciences, Dúbravská cesta 9, 845 11Bratislava, Slovakia
| | - Karol Vegso
- Institute of Physics, Slovak Academy of Sciences, Dúbravská cesta 9, 845 11Bratislava, Slovakia
- Center for Advanced Materials Application, Slovak Academy of Sciences, Dúbravská cesta 9, 845 11Bratislava, Slovakia
| | - Aleš Vlk
- Laboratory of Thin Films, Institute of Physics, ASCR, Cukrovarnická 10, 162 00Prague, Czech Republic
| | - Martin Ledinský
- Laboratory of Thin Films, Institute of Physics, ASCR, Cukrovarnická 10, 162 00Prague, Czech Republic
| | - Matej Jergel
- Institute of Physics, Slovak Academy of Sciences, Dúbravská cesta 9, 845 11Bratislava, Slovakia
- Center for Advanced Materials Application, Slovak Academy of Sciences, Dúbravská cesta 9, 845 11Bratislava, Slovakia
| | - Andrei Chumakov
- Photon Science, Deutsches Elektronen-Synchrotron (DESY), Hamburg22607, Germany
| | - Stephan V Roth
- Photon Science, Deutsches Elektronen-Synchrotron (DESY), Hamburg22607, Germany
| | - Frank Schreiber
- Institute of Applied Physics, University of Tübingen, 72076 Tübingen, Germany
| | - Peter Siffalovic
- Institute of Physics, Slovak Academy of Sciences, Dúbravská cesta 9, 845 11Bratislava, Slovakia
- Center for Advanced Materials Application, Slovak Academy of Sciences, Dúbravská cesta 9, 845 11Bratislava, Slovakia
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42
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De Souza RA, Kemp D, Wolf MJ, Ramadan AHH. Caution! Static Supercell Calculations of Defect Migration in Higher Symmetry ABX3 Perovskite Halides May Be Unreliable: A Case Study of Methylammonium Lead Iodide. J Phys Chem Lett 2022; 13:11363-11368. [PMID: 36454641 DOI: 10.1021/acs.jpclett.2c02984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Activation energies of defect migration in ABX3 perovskite halides are widely obtained through static supercell calculations with the nudged-elastic-band method. Taking methylammonium lead iodide (CH3NH3PbI3, MAPbI3) as an example, we demonstrate that such calculations are unreliable for the higher symmetry structures adopted by the material at temperatures relevant to device operation (tetragonal and cubic MAPbI3) because, in addition to ion relaxation around the point defects, local structural modifications characteristic of the ground-state (orthorhombic) structure occur. In this way, we offer a simple explanation of why calculated activation energies of defect migration in MAPbI3 suffer from surprisingly large scatter. We propose a robust test to determine whether static supercell calculations of point-defect processes in ABX3 perovskite systems are reliable.
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Affiliation(s)
- Roger A De Souza
- Institute of Physical Chemistry, RWTH Aachen University, 52056 Aachen, Germany
| | - Dennis Kemp
- Institute of Physical Chemistry, RWTH Aachen University, 52056 Aachen, Germany
| | - Matthew J Wolf
- Institute of Physical Chemistry, RWTH Aachen University, 52056 Aachen, Germany
| | - Amr H H Ramadan
- Institute of Physical Chemistry, RWTH Aachen University, 52056 Aachen, Germany
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43
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Cho C, Feldmann S, Yeom KM, Jang YW, Kahmann S, Huang JY, Yang TCJ, Khayyat MNT, Wu YR, Choi M, Noh JH, Stranks SD, Greenham NC. Efficient vertical charge transport in polycrystalline halide perovskites revealed by four-dimensional tracking of charge carriers. NATURE MATERIALS 2022; 21:1388-1395. [PMID: 36396960 DOI: 10.1038/s41563-022-01395-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Accepted: 10/03/2022] [Indexed: 06/16/2023]
Abstract
Fast diffusion of charge carriers is crucial for efficient charge collection in perovskite solar cells. While lateral transient photoluminescence microscopies have been popularly used to characterize charge diffusion in perovskites, there exists a discrepancy between low diffusion coefficients measured and near-unity charge collection efficiencies achieved in practical solar cells. Here, we reveal hidden microscopic dynamics in halide perovskites through four-dimensional (directions x, y and z and time t) tracking of charge carriers by characterizing out-of-plane diffusion of charge carriers. By combining this approach with confocal microscopy, we discover a strong local heterogeneity of vertical charge diffusivities in a three-dimensional perovskite film, arising from the difference between intragrain and intergrain diffusion. We visualize that most charge carriers are efficiently transported through the direct intragrain pathways or via indirect detours through nearby areas with fast diffusion. The observed anisotropy and heterogeneity of charge carrier diffusion in perovskites rationalize their high performance as shown in real devices. Our work also foresees that further control of polycrystal growth will enable solar cells with micrometres-thick perovskites to achieve both long optical path length and efficient charge collection simultaneously.
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Affiliation(s)
- Changsoon Cho
- Cavendish Laboratory, Department of Physics, University of Cambridge, Cambridge, UK
| | - Sascha Feldmann
- Cavendish Laboratory, Department of Physics, University of Cambridge, Cambridge, UK
- Rowland Institute, Harvard University, Cambridge, MA, USA
| | - Kyung Mun Yeom
- School of Civil, Environmental and Architectural Engineering, Korea University, Seoul, Republic of Korea
| | - Yeoun-Woo Jang
- Global Frontier Center for Multiscale Energy Systems, Seoul National University, Seoul, Republic of Korea
- Department of Mechanical Engineering, Seoul National University, Seoul, Republic of Korea
| | - Simon Kahmann
- Cavendish Laboratory, Department of Physics, University of Cambridge, Cambridge, UK
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge, UK
| | - Jun-Yu Huang
- Cavendish Laboratory, Department of Physics, University of Cambridge, Cambridge, UK
- Graduate Institute of Photonics and Optoelectronics and Department of Electrical Engineering, National Taiwan University, Taipei, Taiwan
| | - Terry Chien-Jen Yang
- Cavendish Laboratory, Department of Physics, University of Cambridge, Cambridge, UK
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge, UK
| | | | - Yuh-Renn Wu
- Graduate Institute of Photonics and Optoelectronics and Department of Electrical Engineering, National Taiwan University, Taipei, Taiwan
| | - Mansoo Choi
- Global Frontier Center for Multiscale Energy Systems, Seoul National University, Seoul, Republic of Korea
- Department of Mechanical Engineering, Seoul National University, Seoul, Republic of Korea
| | - Jun Hong Noh
- School of Civil, Environmental and Architectural Engineering, Korea University, Seoul, Republic of Korea
- Graduate School of Energy and Environment (KU-KIST Green School), Korea University, Seoul, Republic of Korea
| | - Samuel D Stranks
- Cavendish Laboratory, Department of Physics, University of Cambridge, Cambridge, UK
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge, UK
| | - Neil C Greenham
- Cavendish Laboratory, Department of Physics, University of Cambridge, Cambridge, UK.
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44
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Shi YR, Wang KL, Lou YH, Liu GL, Chen CH, Chen J, Zhang L, Wang ZK. Light-Triggered Sustainable Defect-Passivation for Stable Perovskite Photovoltaics. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2205338. [PMID: 36189887 DOI: 10.1002/adma.202205338] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 09/27/2022] [Indexed: 06/16/2023]
Abstract
The generation of photoinduced defects and freely moving halogen ions is dynamically updated in real time. Accordingly, most reported strategies are static and short-term, which make their improvements in photostability very limited. Therefore, seeking new passivation strategies to match the dynamic characteristics of defect generation is very urgent. Without newly generated defects, a passivation molecule should exist in the configuration that would not become the initiation sites for defect generation. With newly generated defects, the passivation molecule should transfer into the other configuration that possesses the passivation sites. Herein, a classical photoisomeric molecule, spiropyran, is adopted, whose pre- and post-isomeric forms meet the requirements for two different configurations, to realize the state transition once the photoinduced defects appear during subsequent operation and dynamic capture for continuous renewal of defects. Consequently, spiropyrans work as light-triggered and self-healing sustainable passivation sites to realize continuous defect repair. The target devices retain 93% and 99% of their initial power conversion efficiencies after 456 h aging under ultraviolet illumination and 1200 h aging under full-spectrum illumination, respectively. This work provides a novel concept of sustainable passivation strategy to realize continuous defect-passivation and film-healing in perovskite photovoltaics.
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Affiliation(s)
- Yi-Ran Shi
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou, 215123, P. R. China
| | - Kai-Li Wang
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou, 215123, P. R. China
| | - Yan-Hui Lou
- College of Energy, Soochow Institute for Energy and Materials Innovations, Soochow University, Suzhou, 215006, P. R. China
| | - Gen-Lin Liu
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou, 215123, P. R. China
| | - Chun-Hao Chen
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou, 215123, P. R. China
| | - Jing Chen
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou, 215123, P. R. China
| | - Liang Zhang
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou, 215123, P. R. China
| | - Zhao-Kui Wang
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou, 215123, P. R. China
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45
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Chen R, Guan W, Zhou W, Wang Z, Zhang G, Qin C, Hu J, Xiao L, Jia S. The role of atmospheric conditions in the nonradiative recombination in individual CH 3NH 3PbI 3 perovskite crystals. NANOSCALE ADVANCES 2022; 4:4838-4846. [PMID: 36381513 PMCID: PMC9642354 DOI: 10.1039/d2na00541g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/14/2022] [Accepted: 10/10/2022] [Indexed: 06/16/2023]
Abstract
Organic-inorganic metal halide perovskites have been emerging as potential candidates for lightweight photovoltaic applications in space. However, fundamental physics concerning the effect of atmosphere on the radiative and nonradiative recombination in perovskites remains far from well understood. Here, we investigate the creation and annihilation of nonradiative recombination centers in individual CH3NH3PbI3 perovskite crystals by controlling the atmospheric conditions. We find that the photoluminescence (PL) of individual perovskite crystals can be quenched upon exposure from air to vacuum, while the subsequent PL enhancement in air shows a pressure dependence. Further analysis attributes the PL decline in vacuum to the activation of nonradiative trap sites, which is likely due to the lattice distortion caused by the variation of local strain on perovskites. With a gradual increase of the air pressure, the light-assisted chemisorption of oxygen on perovskite will passivate these nonradiative trap sites while simultaneously restoring the lattice imperfection, leading to PL enhancement. The present findings suggest that placing the perovskite in an environment with moderate oxygen content can protect the material from photophysical losses that can be pronounced under inert conditions.
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Affiliation(s)
- Ruiyun Chen
- State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University Taiyuan Shanxi 030006 China
- Collaborative Innovation Center of Extreme Optics, Shanxi University Taiyuan Shanxi 030006 China
| | - Wenling Guan
- State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University Taiyuan Shanxi 030006 China
- Collaborative Innovation Center of Extreme Optics, Shanxi University Taiyuan Shanxi 030006 China
| | - Wenjin Zhou
- State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University Taiyuan Shanxi 030006 China
- Collaborative Innovation Center of Extreme Optics, Shanxi University Taiyuan Shanxi 030006 China
| | - Zixin Wang
- State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University Taiyuan Shanxi 030006 China
- Collaborative Innovation Center of Extreme Optics, Shanxi University Taiyuan Shanxi 030006 China
| | - Guofeng Zhang
- State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University Taiyuan Shanxi 030006 China
- Collaborative Innovation Center of Extreme Optics, Shanxi University Taiyuan Shanxi 030006 China
| | - Chengbing Qin
- State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University Taiyuan Shanxi 030006 China
- Collaborative Innovation Center of Extreme Optics, Shanxi University Taiyuan Shanxi 030006 China
| | - Jianyong Hu
- State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University Taiyuan Shanxi 030006 China
- Collaborative Innovation Center of Extreme Optics, Shanxi University Taiyuan Shanxi 030006 China
| | - Liantuan Xiao
- State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University Taiyuan Shanxi 030006 China
- Collaborative Innovation Center of Extreme Optics, Shanxi University Taiyuan Shanxi 030006 China
| | - Suotang Jia
- State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University Taiyuan Shanxi 030006 China
- Collaborative Innovation Center of Extreme Optics, Shanxi University Taiyuan Shanxi 030006 China
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46
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Recent progress in perovskite solar cells: from device to commercialization. Sci China Chem 2022. [DOI: 10.1007/s11426-022-1426-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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47
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Lv Y, Zhang J, Chen X, Wang L. Enlighten the non-illuminated region by phase segregation of mixed halide perovskites. LIGHT, SCIENCE & APPLICATIONS 2022; 11:311. [PMID: 36289194 PMCID: PMC9606264 DOI: 10.1038/s41377-022-01019-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The well-known ion migration in mixed halide perovskites has been intensely investigated within the area under uniform light illumination. Here, the authors demonstrate that the anion segregation in these materials is a nonlocal effect of which the ion redistribution may occur at a macroscopic or mesoscopic scale beyond.
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Affiliation(s)
- Yan Lv
- School of Flexible Electronics (Future Technologies) & Institute of Advanced Materials, Key Laboratory of Flexible Electronics, Jiangsu National Synergetic Innovation Center for Advanced Materials, School of Physical and Mathematical Sciences, Nanjing Tech University, Nanjing, 211816, China
| | - Junran Zhang
- School of Flexible Electronics (Future Technologies) & Institute of Advanced Materials, Key Laboratory of Flexible Electronics, Jiangsu National Synergetic Innovation Center for Advanced Materials, School of Physical and Mathematical Sciences, Nanjing Tech University, Nanjing, 211816, China
| | - Xiaolong Chen
- Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen, 518055, China.
| | - Lin Wang
- School of Flexible Electronics (Future Technologies) & Institute of Advanced Materials, Key Laboratory of Flexible Electronics, Jiangsu National Synergetic Innovation Center for Advanced Materials, School of Physical and Mathematical Sciences, Nanjing Tech University, Nanjing, 211816, China.
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48
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Kress J, Quarti C, An Q, Bitton S, Tessler N, Beljonne D, Vaynzof Y. Persistent Ion Accumulation at Interfaces Improves the Performance of Perovskite Solar Cells. ACS ENERGY LETTERS 2022; 7:3302-3310. [PMID: 36277131 PMCID: PMC9578041 DOI: 10.1021/acsenergylett.2c01636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Accepted: 08/17/2022] [Indexed: 06/16/2023]
Abstract
The mixed ionic-electronic nature of lead halide perovskites makes their performance in solar cells complex in nature. Ion migration is often associated with negative impacts-such as hysteresis or device degradation-leading to significant efforts to suppress ionic movement in perovskite solar cells. In this work, we demonstrate that ion trapping at the perovskite/electron transport layer interface induces band bending, thus increasing the built-in potential and open-circuit voltage of the device. Quantum chemical calculations reveal that iodine interstitials are stabilized at that interface, effectively trapping them at a remarkably high density of ∼1021 cm-3 which causes the band bending. Despite the presence of this high density of ionic defects, the electronic structure calculations show no sub-band-gap states (electronic traps) are formed due to a pronounced perovskite lattice reorganization. Our work demonstrates that ionic traps can have a positive impact on device performance of perovskite solar cells.
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Affiliation(s)
- Joshua
A. Kress
- Integrated
Centre for Applied Physics and Photonic Materials and Centre for Advancing
Electronics Dresden (cfaed), Technical University
of Dresden, Nöthnitzer Straße 61, 01187 Dresden, Germany
| | - Claudio Quarti
- Laboratory
for Chemistry of Novel Materials, University
of Mons−UMONS, Place du Parc 20, Mons 7000, Belgium
| | - Qingzhi An
- Integrated
Centre for Applied Physics and Photonic Materials and Centre for Advancing
Electronics Dresden (cfaed), Technical University
of Dresden, Nöthnitzer Straße 61, 01187 Dresden, Germany
| | - Sapir Bitton
- Sara
and Moshe Zisapel Nanoelectronics Center, Electrical and Computer
Engineering Department, Technion Israel
Institute of Technology, Haifa 32000, Israel
| | - Nir Tessler
- Sara
and Moshe Zisapel Nanoelectronics Center, Electrical and Computer
Engineering Department, Technion Israel
Institute of Technology, Haifa 32000, Israel
| | - David Beljonne
- Laboratory
for Chemistry of Novel Materials, University
of Mons−UMONS, Place du Parc 20, Mons 7000, Belgium
| | - Yana Vaynzof
- Integrated
Centre for Applied Physics and Photonic Materials and Centre for Advancing
Electronics Dresden (cfaed), Technical University
of Dresden, Nöthnitzer Straße 61, 01187 Dresden, Germany
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49
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Kong L, Zhang X, Zhang C, Wang L, Wang S, Cao F, Zhao D, Rogach AL, Yang X. Stability of Perovskite Light-Emitting Diodes: Existing Issues and Mitigation Strategies Related to Both Material and Device Aspects. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2205217. [PMID: 35921550 DOI: 10.1002/adma.202205217] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 07/12/2022] [Indexed: 06/15/2023]
Abstract
Metal halide perovskites combine excellent electronic and optical properties, such as defect tolerance and high photoluminescence efficiency, with the benefits of low-cost, large-area, solution-based processing. Composition- and dimension-tunable properties of perovskites have already been utilized in bright and efficient light-emitting diodes (LEDs). At the same time, there are still great challenges ahead to achieving operational and spectral stability of these devices. In this review, the origins of instability of perovskite materials, and reasons for their degradation in LEDs are considered. Then, strategies for improving the stability of perovskite materials are reviewed, such as compositional engineering, dimensionality control, defect passivation, suitable encapsulation matrices, and fabrication of core/shell perovskite nanocrystals. For improvement of the operational stability of perovskite LEDs, the use of inorganic charge-transport layers, optimization of charge balance, and proper thermal management are considered. The review is concluded with a detailed account of the current challenges and a perspective on the key approaches and opportunities on how to reach the goal of stable, bright, and efficient perovskite LEDs.
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Affiliation(s)
- Lingmei Kong
- Key Laboratory of Advanced Display and System Applications of Ministry of Education, Shanghai University, Shanghai, 200072, P. R. China
| | - Xiaoyu Zhang
- College of Materials Science and Engineering, Jilin University, Changchun, 130012, P. R. China
| | - Chengxi Zhang
- Key Laboratory of Advanced Display and System Applications of Ministry of Education, Shanghai University, Shanghai, 200072, P. R. China
| | - Lin Wang
- Key Laboratory of Advanced Display and System Applications of Ministry of Education, Shanghai University, Shanghai, 200072, P. R. China
| | - Sheng Wang
- Key Laboratory of Advanced Display and System Applications of Ministry of Education, Shanghai University, Shanghai, 200072, P. R. China
| | - Fan Cao
- Key Laboratory of Advanced Display and System Applications of Ministry of Education, Shanghai University, Shanghai, 200072, P. R. China
| | - Dewei Zhao
- College of Materials Science and Engineering, Engineering Research Center of Alternative Energy Materials & Devices (MoE), Sichuan University, Chengdu, 610065, P. R. China
| | - Andrey L Rogach
- Department of Materials Science and Engineering, and Centre for Functional Photonics (CFP), City University of Hong Kong, Hong Kong SAR, 999077, P. R. China
| | - Xuyong Yang
- Key Laboratory of Advanced Display and System Applications of Ministry of Education, Shanghai University, Shanghai, 200072, P. R. China
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Ma K, Gui Q, Liu C, Yang Y, Xing F, Di Y, Wen X, Jia B, Gan Z. Tunable Multicolor Fluorescence of Perovskite-Based Composites for Optical Steganography and Light-Emitting Devices. Research (Wash D C) 2022; 2022:9896548. [PMID: 36204245 PMCID: PMC9513829 DOI: 10.34133/2022/9896548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Accepted: 08/30/2022] [Indexed: 11/19/2022] Open
Abstract
Multicolor fluorescence of mixed halide perovskites enormously enables their applications in photonics and optoelectronics. However, it remains an arduous task to obtain multicolor emissions from perovskites containing single halogen to avoid phase segregation. Herein, a fluorescent composite containing Eu-based metal-organic frameworks (MOFs), 0D Cs4PbBr6, and 3D CsPbBr3 is synthesized. Under excitations at 365 nm and 254 nm, the pristine composite emits blue (B) and red (R) fluorescence, which are ascribed to radiative defects within Cs4PbBr6 and 5D0→7FJ transitions of Eu3+, respectively. Interestingly, after light soaking in the ambient environment, the blue fluorescence gradually converts into green (G) emission due to the defect repairing and 0D-3D phase conversion. This permanent and unique photochromic effect enables anticounterfeiting and microsteganography with increased security through a micropatterning technique. Moreover, the RGB luminescence is highly stable after encapsulation by a transparent polymer layer. Thus, trichromatic light-emitting modules are fabricated by using the fluorescent composites as color-converting layers, which almost fully cover the standard color gamut. Therefore, this work innovates a strategy for construction of tunable multicolor luminescence by manipulating the radiative defects and structural dimensionality.
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Affiliation(s)
- Kewei Ma
- Center for Future Optoelectronic Functional Materials, School of Computer and Electronic Information/School of Artificial Intelligence, Nanjing Normal University, Nanjing 210023, China
| | - Qingfeng Gui
- College of Naval Architecture and Ocean Engineering, Jiangsu Maritime Institute, Nanjing 211170, China
| | - Cihui Liu
- Center for Future Optoelectronic Functional Materials, School of Computer and Electronic Information/School of Artificial Intelligence, Nanjing Normal University, Nanjing 210023, China
| | - Yunyi Yang
- Centre for Translational Atomaterials, School of Science, Swinburne University of Technology, John Street Hawthorn, VIC 3122, Australia
| | - Fangjian Xing
- Center for Future Optoelectronic Functional Materials, School of Computer and Electronic Information/School of Artificial Intelligence, Nanjing Normal University, Nanjing 210023, China
| | - Yunsong Di
- Center for Future Optoelectronic Functional Materials, School of Computer and Electronic Information/School of Artificial Intelligence, Nanjing Normal University, Nanjing 210023, China
| | - Xiaoming Wen
- Centre for Translational Atomaterials, School of Science, Swinburne University of Technology, John Street Hawthorn, VIC 3122, Australia
| | - Baohua Jia
- Centre for Translational Atomaterials, School of Science, Swinburne University of Technology, John Street Hawthorn, VIC 3122, Australia
- School of Science, RMIT University, Melbourne, 3000 VIC, Australia
| | - Zhixing Gan
- Center for Future Optoelectronic Functional Materials, School of Computer and Electronic Information/School of Artificial Intelligence, Nanjing Normal University, Nanjing 210023, China
- College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
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