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Zhao W, Wu L, Chen J, Ju J, Zeng Y, Wu Z, He J, Huang J, Peng Z, Chen J. Multifunctional Interface Modification Enables Efficient and Stable HTL-Free Carbon-Electroded CsPbI 2Br Perovskite Solar Cells. CHEMSUSCHEM 2024; 17:e202400223. [PMID: 38488334 DOI: 10.1002/cssc.202400223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 03/13/2024] [Indexed: 04/17/2024]
Abstract
In recent years, hole transport layer-free all-inorganic CsPbI2Br carbon-electroded perovskite solar cells (C-PSCs) have garnered significant attention due to a trade-off between stability and photovoltaic performance. However, there are inevitably many defects generated at the surfaces or grain boundaries of CsPbI2Br perovskite films, which will serve as carrier non-radiative recombination centers, and CsPbI2Br perovskite films are sensitive to water molecules to degrade, together with energy level mismatch between CsPbI2Br perovskite and carbon electrodes. Herein, 1-benzyl-3-methylimidazolium hexafluorophosphate (1-B-3-MIMPF6), an imidazolium-based ionic liquid simultaneously containing benzene ring and fluorine atoms, was introduced for the modification of the perovskite/carbon interface. The results showed that it could effectively reduce defects, enhance carrier transfer, mitigate carrier non-radiative recombination, facilitate energy alignment, and block moisture intrusion. Therefore, the photovoltaic performance of the modified PSCs with ITO/SnO2/CsPbI2Br/1-B-3-MIMPF6/carbon architecture has been boosted with a champion power conversion efficiency (PCE) of 13.47 %, open circuit voltage of 1.20 V, short circuit current density of 14.69 mA/cm2, and fill factor of 76 %. Moreover, the unencapsulated modified devices exhibited an improved stability and the PCE maintained 78 % of their initial PCE after 24 h storage at room temperature in a 30 %-35 % humidity environment, whereas that of the pristine devices dropped to almost zero.
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Affiliation(s)
- Wei Zhao
- Key Laboratory of Efficient and Clean Energy Utilization, The Education Department of Hunan Province, School of Energy and Power Engineering, Changsha University of Science and Technology, Changsha, 410114, China
| | - Lin Wu
- Key Laboratory of Efficient and Clean Energy Utilization, The Education Department of Hunan Province, School of Energy and Power Engineering, Changsha University of Science and Technology, Changsha, 410114, China
| | - Jianlin Chen
- Key Laboratory of Efficient and Clean Energy Utilization, The Education Department of Hunan Province, School of Energy and Power Engineering, Changsha University of Science and Technology, Changsha, 410114, China
| | - Jiayao Ju
- Key Laboratory of Efficient and Clean Energy Utilization, The Education Department of Hunan Province, School of Energy and Power Engineering, Changsha University of Science and Technology, Changsha, 410114, China
| | - Yuxi Zeng
- Key Laboratory of Efficient and Clean Energy Utilization, The Education Department of Hunan Province, School of Energy and Power Engineering, Changsha University of Science and Technology, Changsha, 410114, China
| | - Zihan Wu
- Key Laboratory of Efficient and Clean Energy Utilization, The Education Department of Hunan Province, School of Energy and Power Engineering, Changsha University of Science and Technology, Changsha, 410114, China
| | - Jintao He
- Key Laboratory of Efficient and Clean Energy Utilization, The Education Department of Hunan Province, School of Energy and Power Engineering, Changsha University of Science and Technology, Changsha, 410114, China
| | - Jincheng Huang
- Key Laboratory of Efficient and Clean Energy Utilization, The Education Department of Hunan Province, School of Energy and Power Engineering, Changsha University of Science and Technology, Changsha, 410114, China
| | - Zhuoyin Peng
- Key Laboratory of Efficient and Clean Energy Utilization, The Education Department of Hunan Province, School of Energy and Power Engineering, Changsha University of Science and Technology, Changsha, 410114, China
| | - Jian Chen
- Key Laboratory of Efficient and Clean Energy Utilization, The Education Department of Hunan Province, School of Energy and Power Engineering, Changsha University of Science and Technology, Changsha, 410114, China
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2
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Lee YR, Chung YT, Chiang TY, Hsieh T, Su YH, Wang JK. Unraveling Halogen Role in Two-Step Solution Growth of Organic-Inorganic Hybrid Mixed-Halide Perovskites: Guidelines of Fabricating Single-Phase Perovskites with Predictable Stoichiometry. ACS OMEGA 2024; 9:26439-26449. [PMID: 38911784 PMCID: PMC11190909 DOI: 10.1021/acsomega.4c02650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Revised: 05/13/2024] [Accepted: 05/27/2024] [Indexed: 06/25/2024]
Abstract
The challenge faced in optoelectronic applications of halide perovskites is their degradation. Minimizing material imperfections is critical to averting cascade degradation processes. Identifying causes of such imperfections is, however, hindered by mystified growth processes and is particularly urgent for mixed-halide perovskites because of inhomogeneity in growth and phase segregation under stresses. To unravel two-step solution growth of MAPbBr x I3-x , we monitored the evolution of Br composition and found that the construction of perovskite lattice is contributed by iodine from PbI2 substrate and Br from MABr solution with a 1:1 ratio rather than a 2:1 ratio originally thought. Kinetic analysis based on a derived three-stage model extracted activation energies of perovskite construction and anion exchange. This model is applicable to the growth of PbI2 reacting with a mixed solution of MABr and MAI. Two guidelines of fabricating single-phase MAPbBr x I3-x with predictable stoichiometry thus developed help strategizing protocols to reproducibly fabricate mixed-halide perovskite films tailored to specific optoelectronic applications.
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Affiliation(s)
- Ya-Rong Lee
- Institute
of Atomic and Molecular Sciences, Academia
Sinica, Taipei 10617, Taiwan
| | - Yun-Ting Chung
- Department
of Physics, National Taiwan University, Taipei 106, Taiwan
| | - Tsung-Yu Chiang
- Institute
of Atomic and Molecular Sciences, Academia
Sinica, Taipei 10617, Taiwan
| | - Ta−Li Hsieh
- Institute
of Atomic and Molecular Sciences, Academia
Sinica, Taipei 10617, Taiwan
| | - Yi-Hang Su
- Institute
of Atomic and Molecular Sciences, Academia
Sinica, Taipei 10617, Taiwan
| | - Juen-Kai Wang
- Institute
of Atomic and Molecular Sciences, Academia
Sinica, Taipei 10617, Taiwan
- Center
for Condensed Matter Sciences, National
Taiwan University, Taipei 106, Taiwan
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3
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Huang PC, Yang TJ, Lin CJ, Wang MY, Lin WC. Unraveling the Heat- and UV-Induced Degradation of Mixed Halide Perovskite Thin Films via Surface Analysis Techniques. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:11873-11887. [PMID: 38780396 PMCID: PMC11171447 DOI: 10.1021/acs.langmuir.3c03816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2023] [Revised: 04/30/2024] [Accepted: 05/02/2024] [Indexed: 05/25/2024]
Abstract
In recent years, organic-inorganic hybrid perovskite materials have become one of the most promising materials in the new generation of solar cells. These perovskites can provide excellent photoelectric properties after a simple fabrication process. Although perovskite solar cells have achieved high power conversion efficiency, instability concerns regarding material exposure to heat, moisture, air, and UV light present hindrances to commercialization. In this study, three kinds of perovskites (MAPbI3, MAPbI3-xBrx, and MAPbI3-xClx) were used to investigate the crystal stability upon exposure to heat and UV light. SEM, XRD, and FTIR were used to observe the surface morphology, crystal structure, and functional groups of the perovskite thin films. XPS was used to examine the surface composition and chemical state of the perovskite thin films under different conditions. Among these three types of perovskites, it was found that the MAPbI3-xBrx crystal demonstrated the best stability. ToF-SIMS was used to confirm the molecular distribution of the MAPbI3-xBrx films upon exposure to heat and UV light at different depths. ToF-SIMS revealed that [Pb]+ and [PbI]+ aggregated at the interface between the perovskite and ITO substrate after 14 days of thermal treatment. On the other hand, [Pb]+ and [PbI]+ were distributed uniformly after 3 days of UV exposure. This study systematically analyzed and revealed the thermal- and UV-induced degradation process of three perovskite films by using surface analysis techniques. It was concluded that bromine-doped perovskite films had better stability, and UV light caused more severe damage than heat.
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Affiliation(s)
- Pei-Chen Huang
- Department of Photonics, National Sun Yat-sen University, Kaohsiung City 80424, Taiwan (R.O.C.)
| | - Ting-Jia Yang
- Department of Photonics, National Sun Yat-sen University, Kaohsiung City 80424, Taiwan (R.O.C.)
| | - Chia-Jou Lin
- Department of Photonics, National Sun Yat-sen University, Kaohsiung City 80424, Taiwan (R.O.C.)
| | - Man-Ying Wang
- Department of Photonics, National Sun Yat-sen University, Kaohsiung City 80424, Taiwan (R.O.C.)
| | - Wei-Chun Lin
- Department of Photonics, National Sun Yat-sen University, Kaohsiung City 80424, Taiwan (R.O.C.)
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Wang Z, Gao H, Wu D, Meng J, Deng J, Cui M. Defects and Defect Passivation in Perovskite Solar Cells. Molecules 2024; 29:2104. [PMID: 38731595 PMCID: PMC11085331 DOI: 10.3390/molecules29092104] [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: 04/03/2024] [Revised: 04/23/2024] [Accepted: 04/24/2024] [Indexed: 05/13/2024] Open
Abstract
Perovskite solar cells have made significant strides in recent years. However, there are still challenges in terms of photoelectric conversion efficiency and long-term stability associated with perovskite solar cells. The presence of defects in perovskite materials is one of the important influencing factors leading to subpar film quality. Adopting additives to passivate defects within perovskite materials is an effective approach. Therefore, we first discuss the types of defects that occur in perovskite materials and the mechanisms of their effect on performance. Then, several types of additives used in perovskite solar cells are discussed, including ionic compounds, organic molecules, polymers, etc. This review provides guidance for the future development of more sustainable and effective additives to improve the performance of solar cells.
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Affiliation(s)
| | - Hongli Gao
- School of Physics and Optoelectronic Engineering, Beijing University of Technology, Beijing 100124, China
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5
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Han G, Li XF, Berbille A, Zhang Y, Luo X, Liu L, Li L, Wang ZL, Zhu L. Enhanced Piezoelectricity of MAPbI 3 by the Introduction of MXene and Its Utilization in Boosting High-Performance Photodetectors. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024:e2313288. [PMID: 38537247 DOI: 10.1002/adma.202313288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Revised: 03/01/2024] [Indexed: 04/04/2024]
Abstract
Recently, perovskite photodetectors (PDs) are risen to prominence due to substantial research interest. Beyond merely tweaking the composition of materials, a cutting-edge advancement lies in leveraging the innate piezoelectric polarization properties of perovskites themselves. Here, the investigation shows utilizing Ti3C2Tx, a typical MXene, as an intermediate layer for significantly boosting the piezoelectric property of MAPbI3 thin films. This improvement is primarily attributed to the enhanced polarization of the methylammonium (MA+) groups within MAPbI3, induced by the OH groups present in Ti3C2Tx. A flexible PD based on the MAPbI3/MXene heterostructure is then fabricated. The new device is sensitive to a wide range of wavelengths, displays greatly enhanced performance owing to the piezo-phototronic coupling. Moreover, the device is endowed with a greatly reduced response time, down to millisecond level, through the pyro-phototronic effect. The characterization shows applying a -1.2% compressive strain on the PD leads to a remarkable 102% increase in the common photocurrent, and a 76% increase in the pyro-phototronic current. The present work reveals how the emerging piezo-phototronic and pyro-phototronic effects can be employed to design high-performance flexible perovskite PDs.
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Affiliation(s)
- Gaosi Han
- CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 101400, P. R. China
- School of Nanoscience and Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Xiao-Fen Li
- CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 101400, P. R. China
- Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
| | - Andy Berbille
- CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 101400, P. R. China
- School of Nanoscience and Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Yueming Zhang
- CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 101400, P. R. China
- School of Nanoscience and Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Xiongxin Luo
- CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 101400, P. R. China
- School of Nanoscience and Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Lindong Liu
- CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 101400, P. R. China
| | - Longyi Li
- CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 101400, P. R. China
- School of Nanoscience and Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Zhong Lin Wang
- CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 101400, P. R. China
- School of Nanoscience and Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
- Yonsei Frontier Lab, Yonsei University, Seoul, 03722, Republic of Korea
- School of Material Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia, 30332, USA
| | - Laipan Zhu
- CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 101400, P. R. China
- School of Nanoscience and Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
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6
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Xie H, Li L, Zhang J, Zhang Y, Pan Y, Xu J, Yin X, Que W. [BMP] +[BF 4] --Modified CsPbI 1.2Br 1.8 Solar Cells with Improved Efficiency and Suppressed Photoinduced Phase Segregation. Molecules 2024; 29:1476. [PMID: 38611757 PMCID: PMC11013225 DOI: 10.3390/molecules29071476] [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: 01/31/2024] [Revised: 03/21/2024] [Accepted: 03/22/2024] [Indexed: 04/14/2024] Open
Abstract
With the rapid progress in a power conversion efficiency reaching up to 26.1%, which is among the highest efficiency for single-junction solar cells, organic-inorganic hybrid perovskite solar cells have become a research focus in photovoltaic technology all over the world, while the instability of these perovskite solar cells, due to the decomposition of its unstable organic components, has restricted the development of all-inorganic perovskite solar cells. In recent years, Br-mixed halogen all-inorganic perovskites (CsPbI3-xBrx) have aroused great interests due to their ability to balance the band gap and phase stability of pure CsPbX3. However, the photoinduced phase segregation in lead mixed halide perovskites is still a big burden on their practical industrial production and commercialization. Here, we demonstrate inhibited photoinduced phase segregation all-inorganic CsPbI1.2Br1.8 films and their corresponding perovskite solar cells by incorporating a 1-butyl-1-methylpiperidinium tetrafluoroborate ([BMP]+[BF4]-) compound into the CsPbI1.2Br1.8 films. Then, its effect on the perovskite films and the corresponding hole transport layer-free CsPbI1.2Br1.8 solar cells with carbon electrodes under light is investigated. With a prolonged time added to the reduced phase segregation terminal, this additive shows an inhibitory effect on the photoinduced phase segregation phenomenon for perovskite films and devices with enhanced cell efficiency. Our study reveals an efficient and simple route that suppresses photoinduced phase segregation in cesium lead mixed halide perovskite solar cells with enhanced efficiency.
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Affiliation(s)
- Haixia Xie
- School of Science, Xi’an University of Architecture and Technology, Xi’an 710055, China; (Y.Z.); (Y.P.); (J.X.)
- State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace Engineering, Xi’an Jiaotong University, Xi’an 710049, China
| | - Lei Li
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education, International Center for Dielectric Research, Shaanxi Engineering Research Center of Advanced Energy Materials and Devices, School of Electronic Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, China; (L.L.); (J.Z.); (W.Q.)
| | - Jiawei Zhang
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education, International Center for Dielectric Research, Shaanxi Engineering Research Center of Advanced Energy Materials and Devices, School of Electronic Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, China; (L.L.); (J.Z.); (W.Q.)
| | - Yihao Zhang
- School of Science, Xi’an University of Architecture and Technology, Xi’an 710055, China; (Y.Z.); (Y.P.); (J.X.)
| | - Yong Pan
- School of Science, Xi’an University of Architecture and Technology, Xi’an 710055, China; (Y.Z.); (Y.P.); (J.X.)
| | - Jie Xu
- School of Science, Xi’an University of Architecture and Technology, Xi’an 710055, China; (Y.Z.); (Y.P.); (J.X.)
| | - Xingtian Yin
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education, International Center for Dielectric Research, Shaanxi Engineering Research Center of Advanced Energy Materials and Devices, School of Electronic Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, China; (L.L.); (J.Z.); (W.Q.)
| | - Wenxiu Que
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education, International Center for Dielectric Research, Shaanxi Engineering Research Center of Advanced Energy Materials and Devices, School of Electronic Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, China; (L.L.); (J.Z.); (W.Q.)
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7
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Kalita D, Nandi P, Sahu P, Schoekel A, van Embden J, Topwal D, Manju U. Dynamic Structural Evolution and Dual Emission Behavior in Hybrid Organic Lead Bromide Perovskites. J Phys Chem Lett 2024; 15:2557-2565. [PMID: 38416012 DOI: 10.1021/acs.jpclett.4c00250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/29/2024]
Abstract
The optoelectronic properties of organic lead halide perovskites (OLHPs) strongly depend on their underlying crystal symmetry and dynamics. Here, we exploit temperature-dependent synchrotron powder X-ray diffraction and temperature-dependent photoluminescence to investigate how the subtle structural changes happening in the pure and mixed A-site cation MA1-xFAxPbBr3 (x = 0, 0.5, and 1) systems influences their optoelectronic properties. Diffraction investigations reveal a cubic structure at high temperatures and tetragonal and orthorhombic structures with octahedral distortion at low temperatures. Steady state photoluminescence and time correlated single photon counting study reveals that the dual emission behavior of these OLHPs is due to the direct-indirect band formation. In the orthorhombic phase of MAPbBr3, the indirect band is dominated by self-trapped exciton (STE) emission due to the higher-order lattice distortions of PbBr6 octahedra. Our findings provide a comprehensive explanation of the dual emission behavior of OLHPs while also providing a rationale for previous experimental observations.
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Affiliation(s)
- Dhiman Kalita
- Materials Chemistry Department, CSIR-Institute of Minerals and Materials Technology, Bhubaneswar 751013, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Pronoy Nandi
- Department of Energy Science, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Puspanjali Sahu
- Materials Chemistry Department, CSIR-Institute of Minerals and Materials Technology, Bhubaneswar 751013, India
| | | | - Joel van Embden
- School of Science, RMIT University, Melbourne, VIC 3000, Australia
| | - Dinesh Topwal
- Institute of Physics, Bhubaneswar 751005, India
- Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400094, India
| | - Unnikrishnan Manju
- Materials Chemistry Department, CSIR-Institute of Minerals and Materials Technology, Bhubaneswar 751013, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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8
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Niu G, Jiang J, Wang X, Che L, Sui L, Wu G, Yuan K, Yang X. Time-Resolved Dynamics of Metal Halide Perovskite under High Pressure: Recent Progress and Challenges. J Phys Chem Lett 2024; 15:1623-1635. [PMID: 38306470 DOI: 10.1021/acs.jpclett.3c03548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2024]
Abstract
Metal halide perovskites have garnered significant attention in the scientific community for their promising applications in optoelectronic devices. The application of pressure engineering, a viable technique, has played a crucial role in substantially improving the optoelectronic characteristics of perovskites. Despite notable progress in understanding ground-state structural changes under high pressure, a comprehensive exploration of excited-state dynamics influencing luminescence remains incomplete. This Perspective delves into recent advances in time-resolved dynamics studies of photoexcited metal halide perovskites under high pressure. With a focus on the intricate interplay between structural alterations and electronic properties, we investigate electron-phonon interactions, carrier transport mechanisms, and the influential roles of self-trapped excitons (STEs) and coherent phonons in luminescence. However, significant challenges persist, notably the need for more advanced measurement techniques and a deeper understanding of the phenomena induced by high pressure in perovskites.
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Affiliation(s)
- Guangming Niu
- Marine Engineering College, Dalian Maritime University, Dalian 116026, P. R. China
- State Key Laboratory of Molecular Reaction Dynamics and Dalian Coherent Light Source, Dalian Institute of Chemical Physics Chinese Academy of Sciences 457 Zhongshan Road, Dalian 116023, P. R. China
| | - Jutao Jiang
- State Key Laboratory of Molecular Reaction Dynamics and Dalian Coherent Light Source, Dalian Institute of Chemical Physics Chinese Academy of Sciences 457 Zhongshan Road, Dalian 116023, P. R. China
- University of the Chinese Academy of Sciences, Beijing 100039, P. R. China
| | - Xiaowei Wang
- State Key Laboratory of Molecular Reaction Dynamics and Dalian Coherent Light Source, Dalian Institute of Chemical Physics Chinese Academy of Sciences 457 Zhongshan Road, Dalian 116023, P. R. China
- University of the Chinese Academy of Sciences, Beijing 100039, P. R. China
| | - Li Che
- Department of Physics School of Science, Dalian Maritime University, Dalian 116026, P. R. China
| | - Laizhi Sui
- State Key Laboratory of Molecular Reaction Dynamics and Dalian Coherent Light Source, Dalian Institute of Chemical Physics Chinese Academy of Sciences 457 Zhongshan Road, Dalian 116023, P. R. China
| | - Guorong Wu
- State Key Laboratory of Molecular Reaction Dynamics and Dalian Coherent Light Source, Dalian Institute of Chemical Physics Chinese Academy of Sciences 457 Zhongshan Road, Dalian 116023, P. R. China
| | - Kaijun Yuan
- State Key Laboratory of Molecular Reaction Dynamics and Dalian Coherent Light Source, Dalian Institute of Chemical Physics Chinese Academy of Sciences 457 Zhongshan Road, Dalian 116023, P. R. China
- University of the Chinese Academy of Sciences, Beijing 100039, P. R. China
- Hefei National Laboratory, Hefei 230088, China
| | - Xueming Yang
- State Key Laboratory of Molecular Reaction Dynamics and Dalian Coherent Light Source, Dalian Institute of Chemical Physics Chinese Academy of Sciences 457 Zhongshan Road, Dalian 116023, P. R. China
- Hefei National Laboratory, Hefei 230088, China
- Department of Chemistry College of Science, Southern University of Science and Technology, Shenzhen 518055, P. R. China
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9
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Shahzadi U, Yang D, Fatima K, Wang F. Band Gap Alteration of Halide Mixing in Hybrid Perovskites: A First-Principles Study with Statistical Analysis. J Phys Chem A 2024; 128:1173-1180. [PMID: 38321941 DOI: 10.1021/acs.jpca.3c08076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2024]
Abstract
Despite numerous studies on the band gap of three-dimensional halide perovskites using the first-principles calculations, there are still significant discrepancies between theoretical and experimental values. Various solutions have been proposed, such as employing a system-specific hybrid functional with varying degrees of exact exchange and explicitly incorporating spin-orbit coupling effects. Our research involved a comprehensive investigation of three typical lead-containing three-dimensional perovskites MAPbI3, MAPbBr3, and MAPbCl3 (MA = CH3NH3). Through a statistical analysis comparing mean absolute error (MAE) with experimental results, we demonstrated that the nonlocal van der Waals (vdW) density functional corrections (i.e., optB86b) yielded the most approximate lattice parameters in comparison to experimental values. Furthermore, based on these lattice parameters, the HSE06 hybrid functional is the optimal estimation of the band gap among all the options. Moreover, we investigated three sets of mixed three-dimensional halide perovskites by varying the halide component. This exploration contributes to the identification of MAPb(Br0.333I0.667)3 and MAPb(Cl0.333I0.667)3 as exhibiting the smallest band gap of 1.315 (1.867) eV and 1.313 (1.885) eV for PBE (HSE06), respectively. These band gaps were determined using the HSE06 method with the optimized lattice by PBE considering the optB86b corrections. The approach employed in this work produced a band gap trend closely aligned with experimental observations, underscoring the importance of adopting a reliable and material-independent computational strategy when screening new halide perovskite materials for optoelectronic applications.
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Affiliation(s)
- Urooj Shahzadi
- International Laboratory for Quantum Functional Materials of Henan, School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450001,China
| | - Dongwen Yang
- International Laboratory for Quantum Functional Materials of Henan, School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450001,China
| | - Kaneez Fatima
- International Laboratory for Quantum Functional Materials of Henan, School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450001,China
| | - Fei Wang
- International Laboratory for Quantum Functional Materials of Henan, School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450001,China
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10
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Yantara N, Ng SE, Sharma D, Zhou B, Sun PSV, Chua HM, Jamaludin NF, Basu A, Mathews N. Ion-Mediated Recombination Dynamics in Perovskite-Based Memory Light-Emitting Diodes for Neuromorphic Control Systems. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2305857. [PMID: 37640560 DOI: 10.1002/adma.202305857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2023] [Revised: 08/03/2023] [Indexed: 08/31/2023]
Abstract
Neuromorphic devices can help perform memory-heavy tasks more efficiently due to the co-localization of memory and computing. In biological systems, fast dynamics are necessary for rapid communication, while slow dynamics aid in the amplification of signals over noise and regulatory processes such as adaptation- such dual dynamics are key for neuromorphic control systems. Halide perovskites exhibit much more complex phenomena than conventional semiconductors due to their coupled ionic, electronic, and optical properties which result in modulatable drift, diffusion of ions, carriers, and radiative recombination dynamics. This is exploited to engineer a dual-emitter tandem device with the requisite dual slow-fast dynamics. Here, a perovskite-organic tandem light-emitting diode (LED) capable of modulating its emission spectrum and intensity owing to the ion-mediated recombination zone modulation between the green-emitting quasi-2D perovskite layer and the red-emitting organic layer is introduced. Frequency-dependent response and high dynamic range memory of emission intensity and spectra in a LED are demonstrated. Utilizing the emissive read-out, image contrast enhancement as a neuromorphic pre-processing step to improve pattern recognition capabilities is illustrated. As proof of concept using the device's slow-fast dynamics, an inhibition of the return mechanism is physically emulated.
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Affiliation(s)
- Natalia Yantara
- Energy Research Institute @ NTU (ERI@N), Nanyang Technological University, 50 Nanyang Drive, Singapore, 637553, Singapore
| | - Si En Ng
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Divyam Sharma
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Biyan Zhou
- Department of Electrical Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, Hong Kong
| | - Pao-Sheng Vincent Sun
- Department of Electrical Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, Hong Kong
| | - Huei Min Chua
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Nur Fadilah Jamaludin
- Energy Research Institute @ NTU (ERI@N), Nanyang Technological University, 50 Nanyang Drive, Singapore, 637553, Singapore
| | - Arindam Basu
- Department of Electrical Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, Hong Kong
| | - Nripan Mathews
- Energy Research Institute @ NTU (ERI@N), Nanyang Technological University, 50 Nanyang Drive, Singapore, 637553, Singapore
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
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11
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Kim D, Yun T, An S, Lee CL. How to improve the structural stabilities of halide perovskite quantum dots: review of various strategies to enhance the structural stabilities of halide perovskite quantum dots. NANO CONVERGENCE 2024; 11:4. [PMID: 38279984 PMCID: PMC10821855 DOI: 10.1186/s40580-024-00412-x] [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] [Accepted: 01/08/2024] [Indexed: 01/29/2024]
Abstract
Halide perovskites have emerged as promising materials for various optoelectronic devices because of their excellent optical and electrical properties. In particular, halide perovskite quantum dots (PQDs) have garnered considerable attention as emissive materials for light-emitting diodes (LEDs) because of their higher color purities and photoluminescence quantum yields compared to conventional inorganic quantum dots (CdSe, ZnSe, ZnS, etc.). However, PQDs exhibit poor structural stabilities in response to external stimuli (moisture, heat, etc.) owing to their inherent ionic nature. This review presents recent research trends and insights into improving the structural stabilities of PQDs. In addition, the origins of the poor structural stabilities of PQDs and various methods to overcome this drawback are discussed. The structural degradation of PQDs is mainly caused by two mechanisms: (1) defect formation on the surface of the PQDs by ligand dissociation (i.e., detachment of weakly bound ligands from the surface of PQDs), and (2) vacancy formation by halide migration in the lattices of the PQDs due to the low migration energy of halide ions. The structural stabilities of PQDs can be improved through four methods: (1) ligand modification, (2) core-shell structure, (3) crosslinking, and (4) metal doping, all of which are presented in detail herein. This review provides a comprehensive understanding of the structural stabilities and opto-electrical properties of PQDs and is expected to contribute to future research on improving the device performance of perovskite quantum dot LEDs (PeLEDs).
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Affiliation(s)
- Dokyum Kim
- Advanced Photonics Research Institute (APRI), Gwangju Institute of Science and Technology (GIST), Gwangju, 61005, Republic of Korea
| | - Taesun Yun
- Advanced Photonics Research Institute (APRI), Gwangju Institute of Science and Technology (GIST), Gwangju, 61005, Republic of Korea
- Department of Physics, Research Institute of Physics and Chemistry, Jeonbuk National University, Jeonju, 54896, Republic of Korea
| | - Sangmin An
- Department of Physics, Research Institute of Physics and Chemistry, Jeonbuk National University, Jeonju, 54896, Republic of Korea
| | - Chang-Lyoul Lee
- Advanced Photonics Research Institute (APRI), Gwangju Institute of Science and Technology (GIST), Gwangju, 61005, Republic of Korea.
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12
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Park JH, Kim HR, Kim MJ, Song Z, Kang MJ, Son DH, Pyun JC. Defect-Passivated Photosensor Based on Cesium Lead Bromide (CsPbBr 3) Perovskite Quantum Dots for Microbial Detection. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 38019055 DOI: 10.1021/acsami.3c12001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2023]
Abstract
A defect-passivated photosensor based on cesium lead bromide (CsPbBr3) perovskite quantum dots (QD) was fabricated using parylene films, and the photosensor was applied for the microbial detection. The CsPbBr3 perovskite QDs were synthesized to be homogeneous in size under thermodynamic control, and the perovskite QD-based photosensor was fabricated using MoS2 flakes as the electron transfer layer. In this work, a parylene film with functional groups was deposited on a photosensor for physical protection (waterproof) and defect (halide vacancy) passivation of the perovskite QD. As the first effect of the parylene film, the physical protection of the perovskite QD from water was estimated by comparing the photosensor performance after incubation in water. As the second effect of the parylene, the interaction between the functional groups of the parylene film and the halide vacancies of the perovskite QDs was investigated through the bandgap, crystal structure, and trap-state density analysis. Additionally, density functional theory analysis on Mulliken charges, lattice parameters, and Gibbs free energy demonstrated the effect of the defect passivation by parylene films. Finally, the parylene-passivated QD-based photosensor was applied to the detection of two kinds of food-poisoning and gastroduodenal disease bacteria (Listeria monocytogenes and Helicobacter pylori).
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Affiliation(s)
- Jun-Hee Park
- Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-Ro, Seodaemun-gu, Seoul 03722, Republic of Korea
| | - Hong-Rae Kim
- Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-Ro, Seodaemun-gu, Seoul 03722, Republic of Korea
| | - Moon-Ju Kim
- Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-Ro, Seodaemun-gu, Seoul 03722, Republic of Korea
| | - Zhiquan Song
- Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-Ro, Seodaemun-gu, Seoul 03722, Republic of Korea
| | - Min-Jung Kang
- Korea Institute of Science and Technology (KIST), 5 Hwarang-ro 14-gil,, Seongbuk-gu, Seoul 02792, Republic of Korea
| | - Dong Hee Son
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
| | - Jae-Chul Pyun
- Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-Ro, Seodaemun-gu, Seoul 03722, Republic of Korea
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13
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Jo C, Kim D, Lee CL, Ko DK. Ultrafast photo-induced carrier dynamics of perovskite quantum dots during structural degradation. OPTICS EXPRESS 2023; 31:40352-40365. [PMID: 38041339 DOI: 10.1364/oe.504469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Accepted: 11/02/2023] [Indexed: 12/03/2023]
Abstract
In this study, the ultrafast photo-induced carrier dynamics of red-emitting PQDs during structural degradation was investigated using time-resolved transient absorption spectroscopy. The spectroscopic analysis revealed how the carrier dynamics varied when PQDs were exposed to a polar solvent. Three decay modes (carrier trapping, radiative carrier recombination and trap-assisted non-radiative recombination) were proposed to analyze the carrier dynamics of PQDs. The light-emitting property of PQDs is primarily influenced by radiative carrier recombination. This study demonstrates that structural degradation induced halide migration within PQDs and the formation of defects within the crystal lattice, leading to a proliferation of carrier trapping states. The increased trap states led to a reduction in carriers undergoing radiative carrier recombination. Additionally, PQDs degradation accelerated radiative carrier recombination, indicating a faster escape of carriers from excited states. Consequently, these factors hinder carriers remaining in excited states, leading to a decline in the light-emitting property of PQDs. Nevertheless, increasing an excitation fluence could reduce the carrier trapping mode and increase the radiative carrier recombination mode, suggesting a diminishment of the impact of carrier trapping. These findings offer a more comprehensive understanding of structural degradation of PQDs and can contribute to the development of PQDs with high structural stability.
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14
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Roth AN, Chen Y, Santhiran A, Opare-Addo J, Gi E, Smith EA, Rossini AJ, Vela J. Designing complex Pb 3SBr xI 4-x chalcohalides: tunable emission semiconductors through halide-mixing. Chem Sci 2023; 14:12331-12338. [PMID: 37969605 PMCID: PMC10631247 DOI: 10.1039/d3sc02733c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Accepted: 10/12/2023] [Indexed: 11/17/2023] Open
Abstract
Chalcohalides are desirable semiconducting materials due to their enhanced light-absorbing efficiency and stability compared to lead halide perovskites. However, unlike perovskites, tuning the optical properties of chalcohalides by mixing different halide ions into their structure remains to be explored. Here, we present an effective strategy for halide-alloying Pb3SBrxI4-x (1 ≤ x ≤ 3) using a solution-phase approach and study the effect of halide-mixing on structural and optical properties. We employ a combination of X-ray diffraction, electron microscopy, and solid-state NMR spectroscopy to probe the chemical structure of the chalcohalides and determine mixed-halide incorporation. The absorption onsets of the chalcohalides blue-shift to higher energies as bromide replaces iodide within the structure. The photoluminescence maxima of these materials mimics this trend at both the ensemble and single particle fluorescence levels, as observed by solution-phase and single particle fluorescence microscopy, respectively. These materials exhibit superior stability against moisture compared to traditional lead halide perovskites, and IR spectroscopy reveals that the chalcohalide surfaces are terminated by both amine and carboxylate ligands. Electronic structure calculations support the experimental band gap widening and volume reduction with increased bromide incorporation, and provide useful insight into the likely atomic coloring patterns of the different mixed-halide compositions. Ultimately, this study expands the range of tunability that is achievable with chalcohalides, which we anticipate will improve the suitability of these semiconducting materials for light absorbing and emission applications.
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Affiliation(s)
- Alison N Roth
- US DOE Ames National Laboratory Ames Iowa 50010 USA
- Department of Chemistry, Iowa State University Ames Iowa 50011 USA
| | - Yunhua Chen
- US DOE Ames National Laboratory Ames Iowa 50010 USA
- Department of Chemistry, Iowa State University Ames Iowa 50011 USA
| | - Anuluxan Santhiran
- US DOE Ames National Laboratory Ames Iowa 50010 USA
- Department of Chemistry, Iowa State University Ames Iowa 50011 USA
| | - Jemima Opare-Addo
- US DOE Ames National Laboratory Ames Iowa 50010 USA
- Department of Chemistry, Iowa State University Ames Iowa 50011 USA
| | - Eunbyeol Gi
- US DOE Ames National Laboratory Ames Iowa 50010 USA
- Department of Chemistry, Iowa State University Ames Iowa 50011 USA
| | - Emily A Smith
- US DOE Ames National Laboratory Ames Iowa 50010 USA
- Department of Chemistry, Iowa State University Ames Iowa 50011 USA
| | - Aaron J Rossini
- US DOE Ames National Laboratory Ames Iowa 50010 USA
- Department of Chemistry, Iowa State University Ames Iowa 50011 USA
| | - Javier Vela
- US DOE Ames National Laboratory Ames Iowa 50010 USA
- Department of Chemistry, Iowa State University Ames Iowa 50011 USA
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15
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Bala A, Kumar V. Enhanced stability of triple-halide perovskites CsPbI 3-x-yBr xCl y ( x and y = 0-0.024): understanding the role of Cl doping from ab initio calculations. Phys Chem Chem Phys 2023; 25:22989-23000. [PMID: 37594447 DOI: 10.1039/d3cp02476h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/19/2023]
Abstract
Doping of chloride in mixed iodide-bromide perovskites has been shown experimentally to suppress the photo-induced halide-ion segregation and enhance the stability of triple-halide perovskites (THP). However, a fundamental understanding of the effects of Cl doping is yet to be achieved especially when the doping concentration is low. Here we report the results of a state-of-the-art ab initio study of the atomic structure of THP by considering small doping concentrations of Br and Cl in CsPbI3. We find a reduction in the Pb-I bond lengths and tilting of PbI6 octahedra with Cl doping which lead to exothermic heat of mixing and therefore higher stability of THP. Moreover, using quasi-chemical approximation, our results show that there is a very small contribution of configurational entropy to Gibbs free energy at such low doping concentrations and at the operational temperature of 50 °C. This suggests that the favorable heat of mixing value is more important for the stability at low doping concentrations of Cl while a higher concentration of Cl increases the risk of halide segregation. Further calculations on Frenkel defect formation energy of I or Br-interstitial shows that the doping of Cl in I/Br mixed binary-compounds hinders the formation of Frenkel defects. These results support experiments and help to understand the role of chloride in suppressing the halide ion mobility with only a slight increase in the band gap. Accordingly, the THPs manifest a promising pathway for developing single-phase perovskites for solar cells and light-emitting diodes with improved performance and enhanced stability.
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Affiliation(s)
- Anu Bala
- Center for Informatics, School of Natural Sciences, Shiv Nadar Institution of Eminence Deemed to be University, NH-91, Tehsil Dadri, Gautam Buddha Nagar, 201314, Uttar Pradesh, India.
| | - Vijay Kumar
- Center for Informatics, School of Natural Sciences, Shiv Nadar Institution of Eminence Deemed to be University, NH-91, Tehsil Dadri, Gautam Buddha Nagar, 201314, Uttar Pradesh, India.
- Dr. Vijay Kumar Foundation, 1969, Sector 4, Gurgaon 122001, Haryana, India
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16
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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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17
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Ma D, Xu Y, Chen Q, Ding H, Tan X, Xu Q, Yang C. Suppressed Phase Separation of Mixed-Halide Perovskite Quantum Dots Confined in Mesoporous Metal Organic Frameworks. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:nano13101655. [PMID: 37242071 DOI: 10.3390/nano13101655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 04/10/2023] [Accepted: 05/10/2023] [Indexed: 05/28/2023]
Abstract
Mixed-halide perovskite quantum dots (PeQDs) are the most competitive candidates in designing solar cells and light-emitting devices (LEDs) due to their tunable bandgap and high-efficiency quantum yield. However, phase separation in mixed-halide perovskites under illumination can form rich iodine and bromine regions, which change its optical responses. Herein, we synthesize PeQDs combined with mesoporous zinc-based metal organic framework (MOF) crystals, which can greatly improve the stability of anti-anion exchange, including photo-, thermal, and long-term stabilities under illumination. This unique structure provides a solution for improving the performance of perovskite optoelectronic devices and stabilizing mixed-halide perovskite devices.
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Affiliation(s)
- Duanqi Ma
- Department of Physics and Optoelectronic Engineering, Ludong University, Yantai 264025, China
| | - Yanlin Xu
- Department of Physics and Optoelectronic Engineering, Ludong University, Yantai 264025, China
| | - Qiuying Chen
- Department of Physics and Optoelectronic Engineering, Ludong University, Yantai 264025, China
| | - Huafeng Ding
- Department of Physics and Optoelectronic Engineering, Ludong University, Yantai 264025, China
| | - Xiaoming Tan
- Department of Physics and Optoelectronic Engineering, Ludong University, Yantai 264025, China
| | - Qinfeng Xu
- Department of Physics and Optoelectronic Engineering, Ludong University, Yantai 264025, China
| | - Chuanlu Yang
- Department of Physics and Optoelectronic Engineering, Ludong University, Yantai 264025, China
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18
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Wright AD, Patel JB, Johnston MB, Herz LM. Temperature-Dependent Reversal of Phase Segregation in Mixed-Halide Perovskites. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2210834. [PMID: 36821796 DOI: 10.1002/adma.202210834] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Revised: 01/24/2023] [Indexed: 05/12/2023]
Abstract
Understanding the mechanism of light-induced halide segregation in mixed-halide perovskites is essential for their application in multijunction solar cells. Here, photoluminescence spectroscopy is used to uncover how both increases in temperature and light intensity can counteract the halide segregation process. It is observed that, with increasing temperature, halide segregation in CH3 NH3 Pb(Br0.4 I0.6 )3 first accelerates toward ≈290 K, before slowing down again toward higher temperatures. Such reversal is attributed to the trade-off between the temperature activation of segregation, for example through enhanced ionic migration, and its inhibition by entropic factors. High light intensities meanwhile can also reverse halide segregation; however, this is found to be only a transient process that abates on the time scale of minutes. Overall, these observations pave the way for a more complete model of halide segregation and aid the development of highly efficient and stable perovskite multijunction and concentrator photovoltaics.
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Affiliation(s)
- Adam D Wright
- Clarendon Laboratory, Department of Physics, University of Oxford, Parks Road, Oxford, OX1 3PU, UK
| | - Jay B Patel
- Clarendon Laboratory, Department of Physics, University of Oxford, Parks Road, Oxford, OX1 3PU, UK
| | - Michael B Johnston
- Clarendon Laboratory, Department of Physics, University of Oxford, Parks Road, Oxford, OX1 3PU, UK
| | - Laura M Herz
- Clarendon Laboratory, Department of Physics, University of Oxford, Parks Road, Oxford, OX1 3PU, UK
- Institute for Advanced Study, Technical University of Munich (TUM), Lichtenbergstraße 2a, 85748, Garching bei München, Germany
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19
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Zhao J, Chesman ASR, Yan J, Sutherland LJ, Jasieniak J, Lu J, Mao W, Bach U. Precursor Engineering of Lead Acetate-Based Precursors for High-Open-Circuit Voltage Wide-Bandgap Perovskite Solar Cells. ACS APPLIED MATERIALS & INTERFACES 2023; 15:18800-18807. [PMID: 37032480 DOI: 10.1021/acsami.2c22179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
Wide-bandgap (WBG) perovskites have great potential for inclusion in efficient tandem solar cells, but large open-circuit voltage losses have limited device performance to date. Here, we show that a high-quality WBG perovskite, FA0.83Cs0.17Pb(I0.8Br0.2)3, with enlarged grain sizes and improved crystallinity can be achieved by incorporating lead chloride (PbCl2) into a lead acetate (PbAc2)-based precursor. The improved film quality resulted in the suppression of nonradiative recombination and a reduction in defect density. Efficient WBG perovskite solar cells (1.66 eV) with an efficiency of 19.3% and a high Voc of 1.22 V were fabricated using a facile one-step spin-coating method without the need for an antisolvent. Notably, the unencapsulated devices retained 90% of their initial power conversion efficiency after storage in a dry box (10% humidity) for 800 h.
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Affiliation(s)
- Jie Zhao
- Department of Chemical and Biological Engineering, Monash University, Clayton, Victoria 3800, Australia
- ARC Center of Excellence in Exciton Science, Monash University, Clayton, Victoria 3800, Australia
| | | | - Junlin Yan
- Department of Materials Science and Engineering, Monash University, Clayton, Victoria 3800, Australia
| | - Luke J Sutherland
- CSIRO Manufacturing, Clayton, Victoria 3168, Australia
- Department of Materials Science and Engineering, Monash University, Clayton, Victoria 3800, Australia
| | - Jacek Jasieniak
- ARC Center of Excellence in Exciton Science, Monash University, Clayton, Victoria 3800, Australia
- Department of Materials Science and Engineering, Monash University, Clayton, Victoria 3800, Australia
| | - Jianfeng Lu
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China
- Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory, Foshan 528216, China
| | - Wenxin Mao
- Department of Chemical and Biological Engineering, Monash University, Clayton, Victoria 3800, Australia
- ARC Center of Excellence in Exciton Science, Monash University, Clayton, Victoria 3800, Australia
| | - Udo Bach
- Department of Chemical and Biological Engineering, Monash University, Clayton, Victoria 3800, Australia
- ARC Center of Excellence in Exciton Science, Monash University, Clayton, Victoria 3800, Australia
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20
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Hou Y, Li J, Yoon J, Knoepfel AM, Yang D, Zheng L, Ye T, Ghosh S, Priya S, Wang K. Retina-inspired narrowband perovskite sensor array for panchromatic imaging. SCIENCE ADVANCES 2023; 9:eade2338. [PMID: 37058567 PMCID: PMC10104461 DOI: 10.1126/sciadv.ade2338] [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: 08/02/2022] [Accepted: 03/13/2023] [Indexed: 06/19/2023]
Abstract
The retina is the essential part of the human visual system that receives light, converts it to neural signal, and transmits to brain for visual recognition. The red, green, and blue (R/G/B) cone retina cells are natural narrowband photodetectors (PDs) sensitive to R/G/B lights. Connecting with these cone cells, a multilayer neuro-network in the retina provides neuromorphic preprocessing before transmitting to brain. Inspired by this sophistication, we develop the narrowband (NB) imaging sensor combining R/G/B perovskite NB sensor array (mimicking the R/G/B photoreceptors) with a neuromorphic algorithm (mimicking the intermediate neural network) for high-fidelity panchromatic imaging. Compared to commercial sensors, we use perovskite "intrinsic" NB PD to exempt the complex optical filter array. In addition, we use an asymmetric device configuration to collect photocurrent without external bias, enabling a power-free photodetection feature. These results display a promising design for efficient and intelligent panchromatic imaging.
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Affiliation(s)
- Yuchen Hou
- Department of Materials Science and Engineering, Pennsylvania State University, University Park, PA 16802, USA
| | - Junde Li
- School of Electrical Engineering and Computer Science, Pennsylvania State University, University Park, PA 16802 USA
| | - Jungjin Yoon
- Department of Materials Science and Engineering, Pennsylvania State University, University Park, PA 16802, USA
| | - Abbey Marie Knoepfel
- Department of Materials Science and Engineering, Pennsylvania State University, University Park, PA 16802, USA
| | - Dong Yang
- Department of Materials Science and Engineering, Pennsylvania State University, University Park, PA 16802, USA
- Materials Research Institute, Pennsylvania State University, University Park, PA 16802, USA
| | - Luyao Zheng
- Department of Materials Science and Engineering, Pennsylvania State University, University Park, PA 16802, USA
| | - Tao Ye
- Department of Materials Science and Engineering, Pennsylvania State University, University Park, PA 16802, USA
| | - Swaroop Ghosh
- School of Electrical Engineering and Computer Science, Pennsylvania State University, University Park, PA 16802 USA
| | - Shashank Priya
- Department of Materials Science and Engineering, Pennsylvania State University, University Park, PA 16802, USA
- Materials Research Institute, Pennsylvania State University, University Park, PA 16802, USA
| | - Kai Wang
- Department of Materials Science and Engineering, Pennsylvania State University, University Park, PA 16802, USA
- Materials Research Institute, Pennsylvania State University, University Park, PA 16802, USA
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21
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Sattari F, Mirershadi S. Enhancement of absorption in a CH 3NH 3PbI 3-based photonic crystal in the presence of the monolayer MoS 2. Sci Rep 2023; 13:5970. [PMID: 37045905 PMCID: PMC10097723 DOI: 10.1038/s41598-023-33261-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Accepted: 04/11/2023] [Indexed: 04/14/2023] Open
Abstract
Using the transfer matrix approach, we investigate theoretically the absorbance, transmittance, and reflectance through one-dimensional CH3NH3PbI3 perovskite-based photonic crystal at room temperature. In our proposed structure, a monolayer MoS2 film is embedded between two CH3NH3PbI3 layers. We found that, the presence of monolayer MoS2 film increases the absorbance in longer wavelengths [Formula: see text] With increasing the number of periods, absorbance increases in most wavelengths of the incident light. It was shown that, by controlling the number of periods, the absorbance coefficient can be tuned according to the wavelength and angle of incident light. Furthermore, for incident light with longer wavelength, the absorbance, transmittance as well as reflectance versus thickness of the perovskite layer have an oscillatory behavior, and with increasing the number of periods this oscillatory behavior becomes more obvious and prominent. For the incident light in the infrared region, by increasing the number of periods the absorbance as opposed to the transmittance increases for different incidence angles. While, the reflectance coefficient first shows oscillatory behavior by increasing the number of periods, then with a further increase in the number of periods it reaches a constant value. The proposed structure can be useful for optoelectronic and optical devices. Such as improving the efficiency of solar cells based on the hybrid inorganic-organic perovskites and infrared sensor system.
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Affiliation(s)
- Farhad Sattari
- Department of Physics, Faculty of Sciences, University of Mohaghegh Ardabili, Ardabil, P.O. Box 179, Iran.
- Nanoscience and Nanotechnology Research Group, University of Mohaghegh Ardabili, Ardabil, Iran.
| | - Soghra Mirershadi
- Department of Engineering Sciences, Faculty of Advanced Technologies, University of Mohaghegh Ardabili, Namin, Iran
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22
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Sánchez RS, Villanueva-Antolí A, Bou A, Ruiz-Murillo M, Mora-Seró I, Bisquert J. Radiative Recombination Processes in Halide Perovskites Observed by Light Emission Voltage Modulated Spectroscopy. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2207993. [PMID: 36401575 DOI: 10.1002/adma.202207993] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 11/01/2022] [Indexed: 06/16/2023]
Abstract
The kinetics of light emission in halide perovskite light-emitting diodes (LEDs) and solar cells is composed of a radiative recombination of voltage-injected carriers mediated by additional steps such as carrier trapping, redistribution of injected carriers, and photon recycling that affect the observed luminescence decays. These processes are investigated in high-performance halide perovskite LEDs, with external quantum efficiency (EQE) and luminance values higher than 20% and 80 000 Cd m-2 , by measuring the frequency-resolved emitted light with respect to modulated voltage through a new methodology termed light emission voltage modulated spectroscopy (LEVS). The spectra are shown to provide detailed information on at least three different characteristic times. Essentially, new information is obtained with respect to the electrical method of impedance spectroscopy (IS), and overall, LEVS shows promise to capture internal kinetics that are difficult to be discerned by other techniques.
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Affiliation(s)
- Rafael S Sánchez
- Institute of Advanced Materials (INAM), Universitat Jaume I, Castelló, 12006, Spain
| | | | - Agustín Bou
- Institute of Advanced Materials (INAM), Universitat Jaume I, Castelló, 12006, Spain
| | | | - Iván Mora-Seró
- Institute of Advanced Materials (INAM), Universitat Jaume I, Castelló, 12006, Spain
| | - Juan Bisquert
- Institute of Advanced Materials (INAM), Universitat Jaume I, Castelló, 12006, Spain
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23
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Su YH, Chen WL, Byun HR, Zhang YF, Zhuang MR, Lin YC, Chang CK, Wang PY, Lin CC, Lin KI, Liu HK, Lee MK, Jang JI, Chang YM, Hsu KF. Ba 3.5Cu 7.55In 1.15Se 9: A Wide-Bandgap Copper Indium Selenide Reveals Strong Luminescence and Third-Harmonic Generation. Inorg Chem 2023; 62:1570-1579. [PMID: 36656719 DOI: 10.1021/acs.inorgchem.2c03789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
A new copper indium selenide, Ba3.5Cu7.55In1.15Se9, was synthesized by the KBr flux reaction at 800 °C. The compound crystallizes with orthorhombic Pnma, a = 46.1700(12) Å, b = 4.26710(10) Å, c = 19.8125(5) Å, and Z = 8. The structural framework mainly consists of four sites of cubane-type defective M4Se3 (M = Cu, Cu/In) units with disordered Cu+/In3+ ions present at the part corner of each unit. The single crystal emits intense photoluminescence at 657 nm with a relative quantum yield (RQY) 0.2 times that of rhodamine 6G powder. The compound belongs to a direct band gap at 1.91 eV, analyzed by Tauc's plot, and the energy is close to the PL position. The Hall effect measurement on a pressed pellet reveals an n-type conductivity with a carrier concentration of 3.358 × 1017 cm-3 and a mobility of 24.331 cm2 V-1 s-1. Furthermore, the compound produces a strong nonlinear third-harmonic generation (THG), with an χS(3) value of 1.3 × 105 pm2/V2 comparable to 1.6 × 105 pm2/V2 for AgGaSe2 measured at 800 nm.
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Affiliation(s)
- Yu-Hsuan Su
- Department of Chemistry, National Cheng Kung University, Tainan70101, Taiwan
| | - Wei-Liang Chen
- Center for Condensed Matter Sciences, National Taiwan University, Taipei10617, Taiwan
| | - Hye Ryung Byun
- Department of Physics, Sogang University, Seoul04107, South Korea
| | - Yu-Fu Zhang
- Department of Chemistry, National Cheng Kung University, Tainan70101, Taiwan
| | - Min-Rui Zhuang
- Department of Chemistry, National Cheng Kung University, Tainan70101, Taiwan
| | - Yu-Cih Lin
- Department of Chemistry, National Cheng Kung University, Tainan70101, Taiwan
| | - Chung-Kai Chang
- National Synchrotron Radiation Research Center, Hsinchu30076, Taiwan
| | - Po-Yuan Wang
- Department of Chemistry, National Cheng Kung University, Tainan70101, Taiwan
| | - Che-Cheng Lin
- Department of Chemistry, National Cheng Kung University, Tainan70101, Taiwan
| | - Kuang-I Lin
- Core Facility Center, National Cheng Kung University, Tainan70101, Taiwan
| | - Hsin-Kuan Liu
- Core Facility Center, National Cheng Kung University, Tainan70101, Taiwan
| | - Min-Kai Lee
- Core Facility Center, National Cheng Kung University, Tainan70101, Taiwan
| | - Joon I Jang
- Department of Physics, Sogang University, Seoul04107, South Korea
| | - Yu-Ming Chang
- Center for Condensed Matter Sciences, National Taiwan University, Taipei10617, Taiwan
| | - Kuei-Fang Hsu
- Department of Chemistry, National Cheng Kung University, Tainan70101, Taiwan
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24
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Zhou D, Zhao P, Zhang J, Jiang X, Qin S, Zhang X, Jiang R, Deng Y, Jiang H, Zhan G, Luo Y, Ma H, Wang L. Lithographic Multicolor Patterning on Hybrid Perovskites for Nano-Optoelectronic Applications. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2205227. [PMID: 36285770 DOI: 10.1002/smll.202205227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Revised: 09/26/2022] [Indexed: 06/16/2023]
Abstract
Ultrathin hybrid perovskites, with exotic properties and two-dimensional geometry, exhibit great potential in nanoscale optical and optoelectronic devices. However, it is still challenging for them to be compatible with high-resolution patterning technology toward miniaturization and integration applications, as they can be readily damaged by the organic solvents used in standard lithography processes. Here, a flexible three-step method is developed to make high-resolution multicolor patterning on hybrid perovskite, particularly achieved on a single nanosheet. The process includes first synthesis of precursor PbI2 , then e-beam lithography and final conversion to target perovskite. The patterns with linewidth around 150 nm can be achieved, which can be applied in miniature optoelectronic devices and high-resolution displays. As an example, the channel length of perovskite photodetectors can be down to 126 nm. Through deterministic vapor-phase anion exchange, a perovskite nanosheet can not only gradually alter the color of the same pattern in a wide wavelength range, but also display different colors simultaneously. The authors are optimistic that the method can be applied for unlimited perovskite types and device configurations for their high-integrated miniature applications.
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Affiliation(s)
- Dawei Zhou
- School of Flexible Electronics (Future Technologies) & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, School of Physical and Mathematical Sciences, Nanjing Tech University, Nanjing, 211816, China
| | - Peiyi Zhao
- School of Flexible Electronics (Future Technologies) & Institute of Advanced Materials, 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, Jiangsu National Synergetic Innovation Center for Advanced Materials, School of Physical and Mathematical Sciences, Nanjing Tech University, Nanjing, 211816, China
| | - Xiaohong Jiang
- Key Laboratory of Flexible Electronics, Shanxi Key Laboratory of Flexible Electronics, Xi'an Key Laboratory of Flexible Electronics, Xi'an Key Laboratory of Biomedical Materials & Engineering, Xi'an Institute of Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, China
| | - Sichen Qin
- Key Laboratory of Flexible Electronics, Shanxi Key Laboratory of Flexible Electronics, Xi'an Key Laboratory of Flexible Electronics, Xi'an Key Laboratory of Biomedical Materials & Engineering, Xi'an Institute of Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, China
| | - Xu Zhang
- School of Flexible Electronics (Future Technologies) & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, School of Physical and Mathematical Sciences, Nanjing Tech University, Nanjing, 211816, China
| | - Ran Jiang
- School of Flexible Electronics (Future Technologies) & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, School of Physical and Mathematical Sciences, Nanjing Tech University, Nanjing, 211816, China
| | - Yifan Deng
- Key Laboratory of Flexible Electronics, Shanxi Key Laboratory of Flexible Electronics, Xi'an Key Laboratory of Flexible Electronics, Xi'an Key Laboratory of Biomedical Materials & Engineering, Xi'an Institute of Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, China
| | - Hanjun Jiang
- Key Laboratory of Flexible Electronics, Shanxi Key Laboratory of Flexible Electronics, Xi'an Key Laboratory of Flexible Electronics, Xi'an Key Laboratory of Biomedical Materials & Engineering, Xi'an Institute of Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, China
| | - Guixiang Zhan
- School of Flexible Electronics (Future Technologies) & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, School of Physical and Mathematical Sciences, Nanjing Tech University, Nanjing, 211816, China
| | - Yan Luo
- Key Laboratory of Flexible Electronics, Shanxi Key Laboratory of Flexible Electronics, Xi'an Key Laboratory of Flexible Electronics, Xi'an Key Laboratory of Biomedical Materials & Engineering, Xi'an Institute of Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, China
| | - Huifang Ma
- School of Flexible Electronics (Future Technologies) & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, School of Physical and Mathematical Sciences, Nanjing Tech University, Nanjing, 211816, China
| | - Lin Wang
- School of Flexible Electronics (Future Technologies) & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, School of Physical and Mathematical Sciences, Nanjing Tech University, Nanjing, 211816, China
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25
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Jin X, Ma K, Gao H. Tunable Luminescence and Enhanced Polar Solvent Resistance of Perovskite Nanocrystals Achieved by Surface-Initiated Photopolymerization. J Am Chem Soc 2022; 144:20411-20420. [DOI: 10.1021/jacs.2c08622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xiuyu Jin
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Kangling Ma
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Haifeng Gao
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
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26
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Ding J, Gao W, Gao L, Lu K, Liu Y, Sun JL, Yan Q. Unraveling the Effect of Halogen Ion Substitution on the Noise of Perovskite Single-Crystal Photodetectors. J Phys Chem Lett 2022; 13:7831-7837. [PMID: 35976231 DOI: 10.1021/acs.jpclett.2c02069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Halide mixing in perovskites has been an efficient way to engineer the bandgap, stability, and charge carrier mobility of lead halide perovskites, while its effect on the noise of lead halide perovskite photodetectors is still unknown. We present the preparation of mixed halide methylammonium lead perovskite single crystals by the solution temperature-decreasing method. Planar-structured photodetectors were constructed on the basis of these mixed halide perovskite single crystals. The effect of halogen ion substitution on the noise of devices was investigated by analyzing their dark current spectra. It is shown that the single-crystal photodetectors with higher levels of chloride suffer from larger noise thus have lower detectivity. Density functional theory calculations have also been proposed to reveal the effect of halogens on band structure. These results provide a comprehensive understanding of mixed halide perovskites and may help in the design and preparation of higher-performance devices.
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Affiliation(s)
- Jie Ding
- Center for Advanced Laser Technology, Hebei University of Technology, Tianjin 300401, China
- Hebei Key Laboratory of Advanced Laser Technology and Equipment, Tianjin 300401, China
| | - Wanxiao Gao
- Center for Advanced Laser Technology, Hebei University of Technology, Tianjin 300401, China
- Hebei Key Laboratory of Advanced Laser Technology and Equipment, Tianjin 300401, China
| | - Lei Gao
- Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Ke Lu
- Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Yu Liu
- Department of Physics, Tsinghua University, Beijing 100084, China
| | - Jia-Lin Sun
- Department of Physics, Tsinghua University, Beijing 100084, China
| | - Qingfeng Yan
- Department of Chemistry, Tsinghua University, Beijing 100084, China
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27
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Yu J, Huang B, Zheng X, Wang H, Chen F, Xie S, Wang Q, Li J. Spatiotemporally Correlated Imaging of Interfacial Defects and Photocurrents in High Efficiency Triple-Cation Mixed-Halide Perovskites. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2200523. [PMID: 35266302 DOI: 10.1002/smll.202200523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 02/17/2022] [Indexed: 06/14/2023]
Abstract
Triple-cation mixed-halide perovskites have attracted considerable attention due to their excellent photovoltaic properties and enhanced stability, though the power conversion efficiency (PCE) is still far below the theoretical expectation. In order to understand the microscopic mechanisms responsible for the gap, a Cs0.05 (FA0.85 MA0.15 )0.95 Pb(I0.85 Br0.15 )3 (CsFAMA)-based solar cell with respectful efficiency over 20% is examined, and distinct high- and low-current regions are observed in photoconductive atomic force microscopy (pc-AFM) mapping. Simulations attribute the difference in local photocurrents to interfacial donor defect densities at the NiO/CsFAMA interface, which is supported by electrochemical strain microscopy (ESM) mapping, revealing a negative correlation between ionic defects and photocurrents. The interfacial defects can be further manipulated by external bias upon relaxation study, resulting in reduced photocurrents accompanied by topography change when positive ions are driven toward the NiO/CsFAMA interface. It is also observed that both structure variation and photocurrent degradation upon accelerated aging test initiate at grain boundaries, which gradually expand at the expense of grain interior, suggesting that ionic defects are most active at grain boundaries. These findings render a direct correlation between interfacial defects and photocurrents while revealing degradation evolution, and if such interfacial defects heterogeneity can be mitigated, PCE toward the theoretical limit with enhanced stability can be envisioned.
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Affiliation(s)
- Junxi Yu
- Institute for Advanced Study, Chengdu University, Chengdu, 610106, P.R. China
- Key Laboratory of Low Dimensional Materials and Application Technology of Ministry of Education, and School of Materials Science and Engineering, Xiangtan University, Xiangtan, Hunan, 411105, China
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, China
| | - Boyuan Huang
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, China
| | - Xue Zheng
- Shenzhen Key Laboratory of Nanobiomechanics, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong, 518055, China
| | - Huan Wang
- Shenzhen Key Laboratory of Nanobiomechanics, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong, 518055, China
| | - Fang Chen
- Shenzhen Key Laboratory of Nanobiomechanics, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong, 518055, China
| | - Shuhong Xie
- Key Laboratory of Low Dimensional Materials and Application Technology of Ministry of Education, and School of Materials Science and Engineering, Xiangtan University, Xiangtan, Hunan, 411105, China
| | - Qingyuan Wang
- Institute for Advanced Study, Chengdu University, Chengdu, 610106, P.R. China
- MOE Key Laboratory of Deep Earth Science and Engineering, College of Architecture and Environment, Sichuan University, Chengdu, 610065, China
| | - Jiangyu Li
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, China
- Shenzhen Key Laboratory of Nanobiomechanics, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong, 518055, China
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28
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Zhu W, Wang S, Zhang X, Wang A, Wu C, Hao F. Ion Migration in Organic-Inorganic Hybrid Perovskite Solar Cells: Current Understanding and Perspectives. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2105783. [PMID: 35038213 DOI: 10.1002/smll.202105783] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 11/29/2021] [Indexed: 06/14/2023]
Abstract
Organic-inorganic hybrid perovskite (OIHPs) solar cells are the most promising alternatives to traditional silicon solar cells, with a certified power conversion efficiency beyond 25%. However, the poor stability of OHIPs is one of the thorniest obstacles that hinder its commercial development. Among all the factors affecting stability, ion migration is prominent because it is unavoidable and intrinsic in OHIPs. Therefore, it is important to understand the mechanism for ion migration and regulation strategies. Herein, the types of ions that may migrate in OHIPs are first discussed; afterward, the migrating channels are demonstrated. The effects of ion migration are further elaborated. While ion migration can facilitate the p-i-n structure in some cases, the current hysteresis and other adverse effects such as phase segregation in OHIPs attract widespread attention. Based on these, several recent strategies to suppress the ion migration are enumerated, including the introduction of alkali cations, organic additives, grain boundaries passivation, and employment of low-dimensional perovskites. Finally, the prospect for further modulating the ion migration and more stable perovskite solar cells is proposed.
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Affiliation(s)
- Weike Zhu
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, 611731, China
| | - Shurong Wang
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, 611731, China
| | - Xin Zhang
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, 611731, China
| | - Aili Wang
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, 611731, China
| | - Cheng Wu
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, 611731, China
| | - Feng Hao
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, 611731, China
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29
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Lin H, Wei Q, Ng KW, Dong JY, Li JL, Liu WW, Yan SS, Chen S, Xing GC, Tang XS, Tang ZK, Wang SP. Stable and Efficient Blue-Emitting CsPbBr 3 Nanoplatelets with Potassium Bromide Surface Passivation. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2101359. [PMID: 34121319 DOI: 10.1002/smll.202101359] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2021] [Revised: 04/08/2021] [Indexed: 05/14/2023]
Abstract
Colloidal all-inorganic perovskites nanocrystals (NCs) have emerged as a promising material for display and lighting due to their excellent optical properties. However, blue emissive NCs usually suffer from low photoluminescence quantum yields (PLQYs) and poor stability, rendering them the bottleneck for full-color all-perovskite optoelectronic applications. Herein, a facile approach is reported to enhance the emission efficiency and stability of blue emissive perovskite nano-structures via surface passivation with potassium bromide. By adding potassium oleate and excess PbBr2 to the perovskite precursor solutions, potassium bromide-passivated (KBr-passivated) blue-emitting (≈450 nm) CsPbBr3 nanoplatelets (NPLs) is successfully synthesized with a respectably high PLQY of 87%. In sharp contrast to most reported perovskite NPLs, no shifting in emission wavelength is observed in these passivated NPLs even after prolonged exposures to intense irradiations and elevated temperature, clearly revealing their excellent photo- and thermal-stabilities. The enhancements are attributed to the formation of K-Br bonding on the surface which suppresses ion migration and formation of Br-vacancies, thus improving both the PL emission and stability of CsPbBr3 NPLs. Furthermore, all-perovskite white light-emitting diodes (WLEDs) are successfully constructed, suggesting that the proposed KBr-passivated strategy can promote the development of the perovskite family for a wider range of optoelectronic applications.
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Affiliation(s)
- Hao Lin
- Institute of Applied Physics and Materials Engineering, University of Macau, Taipa, Macao SAR, 999078, China
- Key Laboratory of Optoelectronic Technology & Systems, (Ministry of Education), Chongqing University, Chongqing, 400044, China
| | - Qi Wei
- Institute of Applied Physics and Materials Engineering, University of Macau, Taipa, Macao SAR, 999078, China
| | - Kar Wei Ng
- Institute of Applied Physics and Materials Engineering, University of Macau, Taipa, Macao SAR, 999078, China
| | - Jia-Yi Dong
- Institute of Applied Physics and Materials Engineering, University of Macau, Taipa, Macao SAR, 999078, China
| | - Jie-Lei Li
- Institute of Applied Physics and Materials Engineering, University of Macau, Taipa, Macao SAR, 999078, China
| | - Wei-Wei Liu
- Institute of Applied Physics and Materials Engineering, University of Macau, Taipa, Macao SAR, 999078, China
| | - Shan-Shan Yan
- Institute of Applied Physics and Materials Engineering, University of Macau, Taipa, Macao SAR, 999078, China
| | - Shi Chen
- Institute of Applied Physics and Materials Engineering, University of Macau, Taipa, Macao SAR, 999078, China
| | - Gui-Chuan Xing
- Institute of Applied Physics and Materials Engineering, University of Macau, Taipa, Macao SAR, 999078, China
| | - Xiao-Sheng Tang
- Key Laboratory of Optoelectronic Technology & Systems, (Ministry of Education), Chongqing University, Chongqing, 400044, China
| | - Zi-Kang Tang
- Institute of Applied Physics and Materials Engineering, University of Macau, Taipa, Macao SAR, 999078, China
| | - Shuang-Peng Wang
- Institute of Applied Physics and Materials Engineering, University of Macau, Taipa, Macao SAR, 999078, China
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30
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Dong T, Zhao J, Li G, Li FC, Li Q, Chen S. In Situ Synthesis of Robust Polyvinylpyrrolidone-Based Perovskite Nanocrystal Powders by the Fiber-Spinning Chemistry Method and Their Versatile 3D Printing Patterns. ACS APPLIED MATERIALS & INTERFACES 2021; 13:39748-39754. [PMID: 34382763 DOI: 10.1021/acsami.1c10806] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
All-inorganic halide perovskite nanocrystals (PNCs) have received increasing attention due to their excellent optical properties. However, the inherent instability and the large amount of volatile organic compounds during the production process have severely limited their applications. In this research, we employed the microfluidic electrostatic spinning method to synthesize polyvinylpyrrolidone (PVP)-based PNC (CsPbBr3/PVP) powders directly by spinning chemistry, where the fibers serve as reactors. Thus, 20.1 g of CsPbBr3/PVP powders was obtained, which exhibits good fluorescent properties and high stability. Based on these excellent properties, several new applications were explored, including 3D printing, direct encapsulants for light-emitting diodes, and fluorescent coatings. It should be noted that the powder showed distinct advantages in 3D printing, allowing the fabrication of a series of fluorescent patterns, which offers a new candidate for fluorescent 3D printable materials. This work not only opens up an optimal way for facile production of fluorescent powders by the spinning chemistry strategy, but also provides a new perspective for various application directions, especially for 3D printing.
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Affiliation(s)
- Ting Dong
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu Key Laboratory of Fine Chemicals and Functional Polymer Materials, Nanjing Tech University, No. 5 Xin Mofan Road, Nanjing 210009, P. R. China
| | - Jin Zhao
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu Key Laboratory of Fine Chemicals and Functional Polymer Materials, Nanjing Tech University, No. 5 Xin Mofan Road, Nanjing 210009, P. R. China
| | - Ge Li
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu Key Laboratory of Fine Chemicals and Functional Polymer Materials, Nanjing Tech University, No. 5 Xin Mofan Road, Nanjing 210009, P. R. China
| | - Fu-Cheng Li
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu Key Laboratory of Fine Chemicals and Functional Polymer Materials, Nanjing Tech University, No. 5 Xin Mofan Road, Nanjing 210009, P. R. China
| | - Qing Li
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu Key Laboratory of Fine Chemicals and Functional Polymer Materials, Nanjing Tech University, No. 5 Xin Mofan Road, Nanjing 210009, P. R. China
| | - Su Chen
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu Key Laboratory of Fine Chemicals and Functional Polymer Materials, Nanjing Tech University, No. 5 Xin Mofan Road, Nanjing 210009, P. R. China
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31
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Li N, Niu X, Li L, Wang H, Huang Z, Zhang Y, Chen Y, Zhang X, Zhu C, Zai H, Bai Y, Ma S, Liu H, Liu X, Guo Z, Liu G, Fan R, Chen H, Wang J, Lun Y, Wang X, Hong J, Xie H, Jakob DS, Xu XG, Chen Q, Zhou H. Liquid medium annealing for fabricating durable perovskite solar cells with improved reproducibility. Science 2021; 373:561-567. [PMID: 34326239 DOI: 10.1126/science.abh3884] [Citation(s) in RCA: 84] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Accepted: 06/28/2021] [Indexed: 12/24/2022]
Abstract
Solution processing of semiconductors is highly promising for the high-throughput production of cost-effective electronics and optoelectronics. Although hybrid perovskites have potential in various device applications, challenges remain in the development of high-quality materials with simultaneously improved processing reproducibility and scalability. Here, we report a liquid medium annealing (LMA) technology that creates a robust chemical environment and constant heating field to modulate crystal growth over the entire film. Our method produces films with high crystallinity, fewer defects, desired stoichiometry, and overall film homogeneity. The resulting perovskite solar cells (PSCs) yield a stabilized power output of 24.04% (certified 23.7%, 0.08 cm2) and maintain 95% of their initial power conversion efficiency (PCE) after 2000 hours of operation. In addition, the 1-cm2 PSCs exhibit a stabilized power output of 23.15% (certified PCE 22.3%) and keep 90% of their initial PCE after 1120 hours of operation, which illustrates their feasibility for scalable fabrication. LMA is less climate dependent and produces devices in-house with negligible performance variance year round. This method thus opens a new and effective avenue to improving the quality of perovskite films and photovoltaic devices in a scalable and reproducible manner.
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Affiliation(s)
- Nengxu Li
- Experimental Centre for Advanced Materials, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, P. R. China.,Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, BIC-ESAT, School of Materials Science and Engineering, Peking University, Beijing 100871, P. R. China
| | - Xiuxiu Niu
- Experimental Centre for Advanced Materials, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, P. R. China.,Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, BIC-ESAT, School of Materials Science and Engineering, Peking University, Beijing 100871, P. R. China
| | - Liang Li
- Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, BIC-ESAT, School of Materials Science and Engineering, Peking University, Beijing 100871, P. R. China
| | - Hao Wang
- Experimental Centre for Advanced Materials, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, P. R. China.,Beijing Institute of Technology Chongqing Innovation Centre, Chongqing 401120, P. R. China
| | - Zijian Huang
- Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, BIC-ESAT, School of Materials Science and Engineering, Peking University, Beijing 100871, P. R. China
| | - Yu Zhang
- Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, BIC-ESAT, School of Materials Science and Engineering, Peking University, Beijing 100871, P. R. China
| | - Yihua Chen
- Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, BIC-ESAT, School of Materials Science and Engineering, Peking University, Beijing 100871, P. R. China
| | - Xiao Zhang
- Experimental Centre for Advanced Materials, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, P. R. China
| | - Cheng Zhu
- Experimental Centre for Advanced Materials, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, P. R. China
| | - Huachao Zai
- Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, BIC-ESAT, School of Materials Science and Engineering, Peking University, Beijing 100871, P. R. China
| | - Yang Bai
- Experimental Centre for Advanced Materials, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, P. R. China
| | - Sai Ma
- Experimental Centre for Advanced Materials, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, P. R. China
| | - Huifen Liu
- Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, BIC-ESAT, School of Materials Science and Engineering, Peking University, Beijing 100871, P. R. China
| | - Xixia Liu
- Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, BIC-ESAT, School of Materials Science and Engineering, Peking University, Beijing 100871, P. R. China
| | - Zhenyu Guo
- Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, BIC-ESAT, School of Materials Science and Engineering, Peking University, Beijing 100871, P. R. China
| | - Guilin Liu
- School of Science, Jiangnan University, Wuxi, Jiangsu 214122, P. R. China
| | - Rundong Fan
- Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, BIC-ESAT, School of Materials Science and Engineering, Peking University, Beijing 100871, P. R. China
| | - Hong Chen
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), Nanjing 210009, P. R. China
| | - Jianpu Wang
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), Nanjing 210009, P. R. China
| | - Yingzhuo Lun
- School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081, P. R. China
| | - Xueyun Wang
- School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081, P. R. China
| | - Jiawang Hong
- School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081, P. R. China
| | - Haipeng Xie
- Hunan Key Laboratory for Super-microstructure and Ultrafast Process, School of Physics and Electronics, Central South University, Changsha, Hunan 410012, P.R. China
| | - Devon S Jakob
- Department of Chemistry, Lehigh University, Bethlehem, PA 18015, USA
| | - Xiaoji G Xu
- Department of Chemistry, Lehigh University, Bethlehem, PA 18015, USA
| | - Qi Chen
- Experimental Centre for Advanced Materials, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, P. R. China.
| | - Huanping Zhou
- Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, BIC-ESAT, School of Materials Science and Engineering, Peking University, Beijing 100871, P. R. China.
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32
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Datta K, van Gorkom BT, Chen Z, Dyson MJ, van der Pol TPA, Meskers SCJ, Tao S, Bobbert PA, Wienk MM, Janssen RAJ. Effect of Light-Induced Halide Segregation on the Performance of Mixed-Halide Perovskite Solar Cells. ACS APPLIED ENERGY MATERIALS 2021; 4:6650-6658. [PMID: 34337343 PMCID: PMC8317152 DOI: 10.1021/acsaem.1c00707] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Accepted: 06/30/2021] [Indexed: 05/09/2023]
Abstract
Light-induced halide segregation hampers obtaining stable wide-band-gap solar cells based on mixed iodide-bromide perovskites. So far, the effect of prolonged illumination on the performance of mixed-halide perovskite solar cells has not been studied in detail. It is often assumed that halide segregation leads to a loss of open-circuit voltage. By simultaneously recording changes in photoluminescence and solar cell performance under prolonged illumination, we demonstrate that cells instead deteriorate by a loss of short-circuit current density and that the open-circuit voltage is less affected. The concurrent red shift, increased lifetime, and higher quantum yield of photoluminescence point to the formation of relatively emissive iodide-rich domains under illumination. Kinetic Monte Carlo simulations provide an atomistic insight into their formation via exchange of bromide and iodide, mediated by halide vacancies. Localization of photogenerated charge carriers in low-energy iodide-rich domains and subsequent recombination cause reduced photocurrent and red-shifted photoluminescence. The loss in photovoltaic performance is diminished by partially replacing organic cations by cesium ions. Ultrasensitive photocurrent spectroscopy shows that cesium ions result in a lower density of sub-band-gap defects and suppress defect growth under illumination. These defects are expected to play a role in the development and recovery of light-induced compositional changes.
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Affiliation(s)
- Kunal Datta
- Molecular
Materials and Nanosystems & Institute for Complex Molecular Systems, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
| | - Bas T. van Gorkom
- Molecular
Materials and Nanosystems & Institute for Complex Molecular Systems, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
| | - Zehua Chen
- Materials
Simulation and Modelling, Department of Applied Physics, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
- Center
for Computational Energy Research, Department of Applied Physics, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Matthew J. Dyson
- Molecular
Materials and Nanosystems & Institute for Complex Molecular Systems, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
| | - Tom P. A. van der Pol
- Molecular
Materials and Nanosystems & Institute for Complex Molecular Systems, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
| | - Stefan C. J. Meskers
- Molecular
Materials and Nanosystems & Institute for Complex Molecular Systems, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
| | - Shuxia Tao
- Materials
Simulation and Modelling, Department of Applied Physics, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
- Center
for Computational Energy Research, Department of Applied Physics, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Peter A. Bobbert
- Molecular
Materials and Nanosystems & Institute for Complex Molecular Systems, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
- Center
for Computational Energy Research, Department of Applied Physics, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Martijn M. Wienk
- Molecular
Materials and Nanosystems & Institute for Complex Molecular Systems, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
| | - René A. J. Janssen
- Molecular
Materials and Nanosystems & Institute for Complex Molecular Systems, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
- Dutch
Institute for Fundamental Energy Research, 5612 AJ Eindhoven, The Netherlands
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33
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Ayscue RL, Vallet V, Bertke JA, Réal F, Knope KE. Structure-Property Relationships in Photoluminescent Bismuth Halide Organic Hybrid Materials. Inorg Chem 2021; 60:9727-9744. [PMID: 34128679 DOI: 10.1021/acs.inorgchem.1c01025] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Seven novel bismuth(III)-halide phases, Bi2Cl6(terpy)2·0.5(H2O) (1), Bi2Cl4(terpy)2(k2-TC)2(2) (TC = 2-thiophene monocarboxylate), BiCl(terpy)(k2-TC)2 (3A-Cl), BiBr(terpy)(k2-TC)2 (3A-Br), BiCl(terpy)(k2-TC)2 (3B-Cl), [BiCl(terpy)(k2-TC)2][Bi(terpy)(k2-TC)3]·0.55(TCA) (4), [BiBr3(terpy)(MeOH)] (5), and [BiBr2(terpy)(k2-TC)][BiBr1.16(terpy)(k2-TC)1.84] (6), were prepared under mild synthetic conditions from methanolic/aqueous solutions containing BiX3 (X = Cl, Br) and 2,2':6',2″-terpyridine (terpy) and/or 2-thiophene monocarboxylic acid (TCA). A heterometallic series, 3A-Bi1-xEuxCl, with the general formula Bi1-xEuxCl(terpy)(k2-TC)2 (x = 0.001, 0.005, 0.01, 0.05) was also prepared through trace Eu doping of the 3A-Cl phase. The structures were determined through single-crystal X-ray diffraction and are built from a range of molecular units including monomeric and dimeric complexes. The solid-state photoluminescent properties of the compounds were examined through steady-state and time-resolved methods. While the homometallic phases exhibited broad green to yellow emission, the heterometallic phases displayed yellow, orange, and red emission that can be attributed to the simultaneous ligand/Bi-halide and Eu centered emissions. Photoluminescent color tuning was achieved by controlling the relative intensities of these concurrent emissions through compositional modifications including the Eu doping percentage. Notably, all emissive homo- and heterometallic phases exhibited rare visible excitation pathways that based on theoretical quantum mechanical calculations are attributed to halide-metal to ligand charge transfer (XMLCT). Through a combined experimental and computational approach, fundamental insight into the structure-property relationships within these Bi halide organic hybrid materials is provided.
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Affiliation(s)
- R Lee Ayscue
- Department of Chemistry, Georgetown University, 37th and O Streets, NW, Washington, DC 20057, United States
| | - Valérie Vallet
- Université de Lille, CNRS, UMR 8523-PhLAM-Physique des Lasers Atomes et Molécules, 59000 Lille, France
| | - Jeffery A Bertke
- Department of Chemistry, Georgetown University, 37th and O Streets, NW, Washington, DC 20057, United States
| | - Florent Réal
- Université de Lille, CNRS, UMR 8523-PhLAM-Physique des Lasers Atomes et Molécules, 59000 Lille, France
| | - Karah E Knope
- Department of Chemistry, Georgetown University, 37th and O Streets, NW, Washington, DC 20057, United States
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34
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Li W, She Y, Vasenko AS, Prezhdo OV. Ab initio nonadiabatic molecular dynamics of charge carriers in metal halide perovskites. NANOSCALE 2021; 13:10239-10265. [PMID: 34031683 DOI: 10.1039/d1nr01990b] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Photoinduced nonequilibrium processes in nanoscale materials play key roles in photovoltaic and photocatalytic applications. This review summarizes recent theoretical investigations of excited state dynamics in metal halide perovskites (MHPs), carried out using a state-of-the-art methodology combining nonadiabatic molecular dynamics with real-time time-dependent density functional theory. The simulations allow one to study evolution of charge carriers at the ab initio level and in the time-domain, in direct connection with time-resolved spectroscopy experiments. Eliminating the need for the common approximations, such as harmonic phonons, a choice of the reaction coordinate, weak electron-phonon coupling, a particular kinetic mechanism, and perturbative calculation of rate constants, we model full-dimensional quantum dynamics of electrons coupled to semiclassical vibrations. We study realistic aspects of material composition and structure and their influence on various nonequilibrium processes, including nonradiative trapping and relaxation of charge carriers, hot carrier cooling and luminescence, Auger-type charge-charge scattering, multiple excitons generation and recombination, charge and energy transfer between donor and acceptor materials, and charge recombination inside individual materials and across donor/acceptor interfaces. These phenomena are illustrated with representative materials and interfaces. Focus is placed on response to external perturbations, formation of point defects and their passivation, mixed stoichiometries, dopants, grain boundaries, and interfaces of MHPs with charge transport layers, and quantum confinement. In addition to bulk materials, perovskite quantum dots and 2D perovskites with different layer and spacer cation structures, edge passivation, and dielectric screening are discussed. The atomistic insights into excited state dynamics under realistic conditions provide the fundamental understanding needed for design of advanced solar energy and optoelectronic devices.
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Affiliation(s)
- Wei Li
- School of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, People's Republic of China.
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35
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Zhao Y, Wang L, Song T, Mudryi A, Li Y, Chen Q. Recent Progress in Designing Halide-Perovskite-Based System for the Photocatalytic Applications. Front Chem 2021; 8:613174. [PMID: 33520937 PMCID: PMC7838566 DOI: 10.3389/fchem.2020.613174] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Accepted: 11/19/2020] [Indexed: 11/20/2022] Open
Abstract
The halide perovskite material has attracted vast attention as a versatile semiconductor in the past decade. With the unique advantages in physical and chemical properties, they have also shown great potential in photocatalytic applications. This review aims at the specific design principles triggered by the unique properties when employing halide-perovskite-based photocatalytic systems from the following perspectives: (I) Design of photoelectrocatalytic device structures including the n-i-p/p-i-n structure, photoelectrode device encapsulation, and electrolyte engineering. (II) The design of heterogeneous photocatalytic systems toward the hydrogen evolution reaction (HER) and CO2 reduction reaction, including the light management, surface/interface engineering, stability improvement, product selectivity engineering, and reaction system engineering. (III) The photocatalysts for the environmental application and organic synthesis. Based on the analyses, the review also suggests the prospective research for the future development of halide-perovskite-based photocatalytic systems.
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Affiliation(s)
- Yizhou Zhao
- Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications, Experimental Center of Advanced Materials, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, China
| | - Lanning Wang
- Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications, Experimental Center of Advanced Materials, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, China
| | - Tinglu Song
- Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications, Experimental Center of Advanced Materials, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, China
| | - Alexander Mudryi
- Scientific-Practical Material Research Centre of the National Academy of Science of Belarus, Minsk, Belarus
| | - Yujing Li
- Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications, Experimental Center of Advanced Materials, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, China
| | - Qi Chen
- Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications, Experimental Center of Advanced Materials, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, China
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36
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Cho SB, Jung JW, Kim YS, Cho CH, Park IK. Emission wavelength control of CsPb(Br 1−xCl x) 3 nanocrystals for blue light-emitting diode applications. CrystEngComm 2021. [DOI: 10.1039/d1ce00132a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
A facile synthetic method of CsPb(Br1−xClx)3 halide perovskite nanocrystals, which emit light with the wavelengths ranging from green to blue based on an anion exchanging reaction using a halide exchange additive was reported.
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Affiliation(s)
- Seung-Bum Cho
- Department of Materials Science and Engineering
- Seoul National University of Science and Technology
- Seoul 01811
- Republic of Korea
| | - Jin-Woo Jung
- Department of Emerging Materials Science
- Daegu Gyeongbuk Institute of Science and Technology (DGIST)
- Daegu 42988
- Republic of Korea
| | - Yoon Seok Kim
- Department of Nano & Semiconductor Engineering
- Korea Polytechnic University
- Siheung 429-793
- Republic of Korea
| | - Chang-Hee Cho
- Department of Emerging Materials Science
- Daegu Gyeongbuk Institute of Science and Technology (DGIST)
- Daegu 42988
- Republic of Korea
| | - Il-Kyu Park
- Department of Materials Science and Engineering
- Seoul National University of Science and Technology
- Seoul 01811
- Republic of Korea
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37
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Ghosh S, Pradhan B, Zhang Y, Hofkens J, Karki KJ, Materny A. Nature of the different emissive states and strong exciton-phonon couplings in quasi-two-dimensional perovskites derived from phase-modulated two-photon micro-photoluminescence spectroscopy. Phys Chem Chem Phys 2021; 23:3983-3992. [PMID: 33554234 DOI: 10.1039/d0cp05538g] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Quasi two-dimensional perovskites have attracted great attention for applications in light-emitting devices and photovoltaics due to their robustness and tunable highly efficient photoluminescence (PL). However, the mechanism of intrinsic PL in these materials is still not fully understood. In this work, we have analysed the nature of the different emissive states and the impact of temperature on the emissions in quasi two-dimensional methyl ammonium lead bromide perovskite (q-MPB) and cesium lead bromide perovskite (q-CPB). We have used spatially resolved phase-modulated two-photon photoluminescence (2PPL) and temperature-dependent 2PPL to characterize the emissions. Our results show that at room temperature, the PL from q-MPB is due to the recombination of excitons and free carriers while the PL from q-CPB is due to the recombination of excitons only. Temperature-dependent measurements show that in both materials the linewidth broadening is due to the interactions between the excitons and optical phonons at high temperatures. Comparing the characteristics of the emissions in the two systems, we conclude that q-CPB is better suited for light emitting devices. With a further optimization to reduce the impact on the environment, q-CPB-based LEDs could perform as well as OLEDs.
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Affiliation(s)
- Supriya Ghosh
- Department of Physics and Earth Sciences, Jacobs University Bremen, Campus Ring 1, 28759, Bremen, Germany.
| | - Bapi Pradhan
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001 Heverlee, Belgium.
| | - Yiyue Zhang
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001 Heverlee, Belgium.
| | - Johan Hofkens
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001 Heverlee, Belgium. and Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Khadga J Karki
- Phutung Research Institute, Devisthan-marg 5, Goldhunga, Tarakeshwor 5, Kathmandu, 44611, Nepal.
| | - Arnulf Materny
- Department of Physics and Earth Sciences, Jacobs University Bremen, Campus Ring 1, 28759, Bremen, Germany.
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38
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Zhu X, Du M, Feng J, Wang H, Xu Z, Wang L, Zuo S, Wang C, Wang Z, Zhang C, Ren X, Priya S, Yang D, Liu S(F. High‐Efficiency Perovskite Solar Cells with Imidazolium‐Based Ionic Liquid for Surface Passivation and Charge Transport. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202010987] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Xuejie Zhu
- Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science and Engineering Shaanxi Normal University Xi'an 710119 China
| | - Minyong Du
- Dalian National Laboratory for Clean Energy, iChEM Dalian Institute of Chemical Physics Chinese Academy of Sciences 457 Zhongshan Road Dalian 116023 China
| | - Jiangshan Feng
- Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science and Engineering Shaanxi Normal University Xi'an 710119 China
| | - Hui Wang
- Dalian National Laboratory for Clean Energy, iChEM Dalian Institute of Chemical Physics Chinese Academy of Sciences 457 Zhongshan Road Dalian 116023 China
| | - Zhuo Xu
- Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science and Engineering Shaanxi Normal University Xi'an 710119 China
| | - Likun Wang
- Dalian National Laboratory for Clean Energy, iChEM Dalian Institute of Chemical Physics Chinese Academy of Sciences 457 Zhongshan Road Dalian 116023 China
| | - Shengnan Zuo
- Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science and Engineering Shaanxi Normal University Xi'an 710119 China
| | - Chenyu Wang
- Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science and Engineering Shaanxi Normal University Xi'an 710119 China
| | - Ziyu Wang
- Dalian National Laboratory for Clean Energy, iChEM Dalian Institute of Chemical Physics Chinese Academy of Sciences 457 Zhongshan Road Dalian 116023 China
| | - Cong Zhang
- Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science and Engineering Shaanxi Normal University Xi'an 710119 China
| | - Xiaodong Ren
- Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science and Engineering Shaanxi Normal University Xi'an 710119 China
| | - Shashank Priya
- Materials Science and Engineering Pennsylvania State University University Park PA 16802 USA
| | - Dong Yang
- Materials Science and Engineering Pennsylvania State University University Park PA 16802 USA
| | - Shengzhong (Frank) Liu
- Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science and Engineering Shaanxi Normal University Xi'an 710119 China
- Dalian National Laboratory for Clean Energy, iChEM Dalian Institute of Chemical Physics Chinese Academy of Sciences 457 Zhongshan Road Dalian 116023 China
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39
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Zhu X, Du M, Feng J, Wang H, Xu Z, Wang L, Zuo S, Wang C, Wang Z, Zhang C, Ren X, Priya S, Yang D, Liu SF. High-Efficiency Perovskite Solar Cells with Imidazolium-Based Ionic Liquid for Surface Passivation and Charge Transport. Angew Chem Int Ed Engl 2020; 60:4238-4244. [PMID: 33156572 DOI: 10.1002/anie.202010987] [Citation(s) in RCA: 67] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 09/09/2020] [Indexed: 11/11/2022]
Abstract
Surface defects have been a key constraint for perovskite photovoltaics. Herein, 1,3-dimethyl-3-imidazolium hexafluorophosphate (DMIMPF6 ) ionic liquid (IL) is adopted to passivate the surface of a formamidinium-cesium lead iodide perovskite (Cs0.08 FA0.92 PbI3 ) and also reduce the energy barrier between the perovskite and hole transport layer. Theoretical simulations and experimental results demonstrate that Pb-cluster and Pb-I antisite defects can be effectively passivated by [DMIM]+ bonding with the Pb2+ ion on the perovskite surface, leading to significantly suppressed non-radiative recombination. As a result, the solar cell efficiency was increased to 23.25 % from 21.09 %. Meanwhile, the DMIMPF6 -treated perovskite device demonstrated long-term stability because the hydrophobic DMIMPF6 layer blocked moisture permeation.
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Affiliation(s)
- Xuejie Zhu
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Minyong Du
- Dalian National Laboratory for Clean Energy, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China
| | - Jiangshan Feng
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Hui Wang
- Dalian National Laboratory for Clean Energy, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China
| | - Zhuo Xu
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Likun Wang
- Dalian National Laboratory for Clean Energy, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China
| | - Shengnan Zuo
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Chenyu Wang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Ziyu Wang
- Dalian National Laboratory for Clean Energy, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China
| | - Cong Zhang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Xiaodong Ren
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Shashank Priya
- Materials Science and Engineering, Pennsylvania State University, University Park, PA, 16802, USA
| | - Dong Yang
- Materials Science and Engineering, Pennsylvania State University, University Park, PA, 16802, USA
| | - Shengzhong Frank Liu
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710119, China.,Dalian National Laboratory for Clean Energy, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China
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40
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Wang X, Wang Q, Chai Z, Wu W. The thermal stability of FAPbBr 3 nanocrystals from temperature-dependent photoluminescence and first-principles calculations. RSC Adv 2020; 10:44373-44381. [PMID: 35517129 PMCID: PMC9058516 DOI: 10.1039/d0ra07668f] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Accepted: 11/10/2020] [Indexed: 01/23/2023] Open
Abstract
The temperature dependence of FAPbBr3 perovskite nanocrystals (PNCs) is investigated experimentally by steady-state and time-resolved photoluminescence (PL) spectroscopies. With the temperature increase, photon energies of line width and emission peak become larger due to stronger exciton-phonon coupling. Furthermore, theoretical calculations of first-principles simulations are used to estimate comparatively the thermal stability of typical FAPbBr3 PNCs. It is found that the PL peaks of PNCs slightly change with increasing temperature below 175 K and then blueshift steeply decreases rapidly till 400 K, which is related to phase transition from orthorhombic to tetragonal and cubic phase. The simulated results show the PL and the crystal structure of FAPbBr3 are largely dependent on the temperature. With higher temperature, the photon energy of the PL peak becomes larger, and the calculated band gap of FAPbBr3 is about 2.15 eV at 80 K, which is in good agreement with the experimental results. It is confirmed that temperature-dependent PL is composed of a band-edge exciton state and trapping state emission. The results obtained will be of certain significance to further expand other hybrid organometal perovskite materials.
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Affiliation(s)
- Xiaozhe Wang
- School of Electronic Engineering, Heilongjiang University Harbin Heilongjiang 150080 China
| | - Qi Wang
- School of Electronic Engineering, Heilongjiang University Harbin Heilongjiang 150080 China
| | - Zhijun Chai
- School of Electronic Engineering, Heilongjiang University Harbin Heilongjiang 150080 China
| | - Wenzhi Wu
- School of Electronic Engineering, Heilongjiang University Harbin Heilongjiang 150080 China
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41
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Jeong JE, Park JH, Jang CH, Song MH, Woo HY. Multifunctional Charge Transporting Materials for Perovskite Light-Emitting Diodes. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e2002176. [PMID: 32886378 DOI: 10.1002/adma.202002176] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 05/03/2020] [Indexed: 06/11/2023]
Abstract
Despite their low exciton-binding energies, metal halide perovskites are extensively studied as light-emitting materials owing to narrow emission with high color purity, easy/wide color tunability, and high photoluminescence quantum yields. To improve the efficiency of perovskite light-emitting diodes (PeLEDs), much effort has been devoted to controlling the emitting layer morphologies to induce charge confinement and decrease the nonradiative recombination. The interfaces between the emitting layer and charge transporting layer (CTL) are vulnerable to various defects that deteriorate the efficiency and stability of the PeLEDs. Therefore, the establishment of multifunctional CTLs that can improve not only charge transport but also critical factors that influence device performance, such as defect passivation, morphology/phase control, ion migration suppression, and light outcoupling efficiency, are highly required. Herein, the fundamental limitations of perovskites as emitters (i.e., defects, morphological and phase instability, high refractive index with poor outcoupling) and the recent developments with regard to multifunctional CTLs to compensate such limitations are summarized, and their device applications are also reviewed. Finally, based on the importance of multifunctional CTLs, the outlook and research prospects of multifunctional CTLs for the further improvement of PeLEDs are discussed.
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Affiliation(s)
- Ji-Eun Jeong
- Department of Chemistry, Korea University, Anam-ro 145, Seoul, 02841, Republic of Korea
| | - Jong Hyun Park
- School of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), UNIST-gil 50, Ulsan, 44919, Republic of Korea
| | - Chung Hyeon Jang
- School of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), UNIST-gil 50, Ulsan, 44919, Republic of Korea
| | - Myoung Hoon Song
- School of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), UNIST-gil 50, Ulsan, 44919, Republic of Korea
| | - Han Young Woo
- Department of Chemistry, Korea University, Anam-ro 145, Seoul, 02841, Republic of Korea
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42
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Zhevstovskikh IV, Averkiev NS, Sarychev MN, Semenova OI, Golyashov VA, Tereshchenko OE. Correlation of elastic and optoelectronic properties near structural phase transition in organic-inorganic lead iodide perovskite single crystals. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2020; 33:045403. [PMID: 32947281 DOI: 10.1088/1361-648x/abb9bb] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Accepted: 09/18/2020] [Indexed: 06/11/2023]
Abstract
The experimental evidence of the influence of the structural phase transition on the elastic and optoelectronic properties of CH3NH3PbI3single crystals has been reported. A peak in the attenuation for longitudinal and shear ultrasonic waves and a step-like anomaly in their velocity have been found near the structural the orthorhombic-to-tetragonal phase transition (160 K). The narrow hysteresis observed in the temperature dependences of the elastic properties confirms that this is the first-order phase transition. A redshift of the absorption threshold (of about 110 meV) has been revealed both in the photocurrent (PC) and in the photoluminescence (PL) spectra with increasing temperature from 140 to 160 K. In the orthorhombic phase of CH3NH3PbI3single crystals, the fine exciton structure in the PC spectrum has been found with an exciton binding energy of 19-25 meV. The peculiarities of the PC and PL spectra near the phase transition temperature (160 K) have been observed within a wider temperature range in contrast to the elastic anomalies that can be explained by the complex structure of the near-surface region. It may be essential for the further development of optoelectronic devices based on hybrid halide perovskites.
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Affiliation(s)
- Irina V Zhevstovskikh
- M N Miheev Institute of Metal Physics of Ural Branch of Russian Academy of Sciences, Ekaterinburg 620108, Russia
- Ural Federal University, Ekaterinburg 620002, Russia
| | | | | | - Olga I Semenova
- A V Rzhanov Institute of Semiconductor Physics, Siberian Branch of Russian Academy of Sciences, Novosibirsk 630090, Russia
| | - Vladimir A Golyashov
- A V Rzhanov Institute of Semiconductor Physics, Siberian Branch of Russian Academy of Sciences, Novosibirsk 630090, Russia
| | - Oleg E Tereshchenko
- A V Rzhanov Institute of Semiconductor Physics, Siberian Branch of Russian Academy of Sciences, Novosibirsk 630090, Russia
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43
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Delmas WG, Vickers ET, DiBenedetto AC, Lum C, Hernandez IN, Zhang JZ, Ghosh S. Modulating Charge Carrier Dynamics and Transfer via Surface Modifications in Organometallic Halide Perovskite Quantum Dots. J Phys Chem Lett 2020; 11:7886-7892. [PMID: 32870009 DOI: 10.1021/acs.jpclett.0c02151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We investigate the effect of functionalization by acid/amine combinations of four aromatic capping ligands on the optoelectronic properties of CH3NH3PbBr3 perovskite quantum dots (PQDs). These include benzoic acid (BA), phenylacetic acid (PAA), benzylamine, and isopropyl benzylamine. We observe that charge transfer efficiency in PQD films comprising BA-ligated samples varies between 12% and 95% as the dot density is tuned from 102 to 105 dots/μm2 but is consistently ∼92% over that entire range for PAA-ligated PQDs. As temperature T decreases, initially, recombination is dominated by bound or trapped excitons, but below 80 K, spectral broadening, accompanied by free excitonic behavior, is observed. Our results indicate enhanced charge delocalization at lower values of T, which reduces the level of exciton confinement and recombination decay rates and underlines the importance of investigating PQD-ligand interactions at a fundamental level given the significant effect minute changes in ligand structures have on the optoelectronic properties of quantum dots.
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Affiliation(s)
- William G Delmas
- Department of Physics, School of Natural Sciences, University of California, Merced, California 95344, United States
| | - Evan T Vickers
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, California 95064, United States
| | - Albert C DiBenedetto
- Department of Physics, School of Natural Sciences, University of California, Merced, California 95344, United States
| | - Calista Lum
- Department of Physics, School of Natural Sciences, University of California, Merced, California 95344, United States
| | - Isaak N Hernandez
- Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Jin Z Zhang
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, California 95064, United States
| | - Sayantani Ghosh
- Department of Physics, School of Natural Sciences, University of California, Merced, California 95344, United States
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44
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Duan Z, Ning J, Chen M, Xiong Y, Yang W, Xiao F, Kershaw SV, Zhao N, Xiao S, Rogach AL. Broad-Band Photodetectors Based on Copper Indium Diselenide Quantum Dots in a Methylammonium Lead Iodide Perovskite Matrix. ACS APPLIED MATERIALS & INTERFACES 2020; 12:35201-35210. [PMID: 32700521 DOI: 10.1021/acsami.0c06837] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Low-temperature solution-processed methylammonium lead iodide (MAPbI3) crystalline films have shown outstanding performance in optoelectronic devices. However, their high dark current and high noise equivalent power prevent their application in broad-band photodetectors. Here, we applied a facile solution-based antisolvent strategy to fabricate a hybrid structure of CuInSe2 quantum dots (CISe QDs) embedded into a MAPbI3 matrix, which not only enhances the photodetector responsivity, showing a large on/off ratio of 104 at 2 V bias compared with the bare perovskite films, but also significantly (for over 7 days) improves the device stability, with hydrophobic ligands on the CuInSe2 QDs acting as a barrier against the uptake of environmental moisture. MAPbI3/CISe QD-based lateral photodetectors exhibit high responsivities of >0.5 A/W and 10.4 mA/W in the visible and near-infrared regions, respectively, partly because of the formation of a type II interface between the respective semiconductors but most significantly because of the efficient trap-state passivation of the perovskite grain surfaces, and the reduction in the twinning-induced trap density, which stems from both CISe QDs and their organic ligands. A large specific detectivity of 2.2 × 1012 Jones at 525 nm illumination (1 μW/cm2), a fast fall time of 236 μs, and an extremely low noise equivalent power of 45 fW/Hz1/2 have been achieved.
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Affiliation(s)
- Zonghui Duan
- Department of Materials Science and Engineering, and Centre for Functional Photonics (CFP), City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR 999077, China
| | - Jiajia Ning
- Department of Materials Science and Engineering, and Centre for Functional Photonics (CFP), City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR 999077, China
| | - Mengyu Chen
- Department of Electronic Engineering, Chinese University of Hong Kong, New Territories, Hong Kong SAR 999077, China
| | - Yuan Xiong
- Department of Materials Science and Engineering, and Centre for Functional Photonics (CFP), City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR 999077, China
| | - Wenhong Yang
- State Key Laboratory on Tunable Laser Technology, Ministry of Industry and Information Technology Key Lab of Micro-Nano Optoelectronic Information System, Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055, China
| | - Fengping Xiao
- Department of Materials Science and Engineering, and Centre for Functional Photonics (CFP), City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR 999077, China
| | - Stephen V Kershaw
- Department of Materials Science and Engineering, and Centre for Functional Photonics (CFP), City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR 999077, China
| | - Ni Zhao
- Department of Electronic Engineering, Chinese University of Hong Kong, New Territories, Hong Kong SAR 999077, China
| | - Shumin Xiao
- State Key Laboratory on Tunable Laser Technology, Ministry of Industry and Information Technology Key Lab of Micro-Nano Optoelectronic Information System, Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055, China
| | - Andrey L Rogach
- Department of Materials Science and Engineering, and Centre for Functional Photonics (CFP), City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR 999077, China
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45
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Rehermann C, Merdasa A, Suchan K, Schröder V, Mathies F, Unger EL. Origin of Ionic Inhomogeneity in MAPb(I xBr 1-x) 3 Perovskite Thin Films Revealed by In-Situ Spectroscopy during Spin Coating and Annealing. ACS APPLIED MATERIALS & INTERFACES 2020; 12:30343-30352. [PMID: 32510922 DOI: 10.1021/acsami.0c05894] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Irradiation-induced phase segregation in mixed methylammonium halide perovskite samples such as methylammonium lead bromide-iodide, MAPb(IxBr1-x)3, is being studied intensively because it limits the efficiency of wide band gap perovskite solar cells. It has been postulated that this phenomenon depends on the intrinsic ionic (in)homogeneity in samples already induced during film formation. A deeper understanding of the MAPb(IxBr1-x)3 formation processes and the influence of the halide ratio, solvents, and the perovskite precursor composition as well as the influence of processing parameters during deposition, e.g., spin coating and annealing parameters, is still lacking. Here, we use a fiber optic-based optical in-situ setup to study the formation processes of the MAPb(IxBr1-x)3 series on a subsecond time scale during spin coating and thermal annealing. In-situ UV-vis measurements during spin coating reveal the influence of different halide ratios, x, in the precursor solution on the preferential crystallization of the phase. Pure bromide samples directly form a perovskite phase, samples with high iodide content form a solvate intermediate phase, and samples with a mixed stoichiometry between 0.1 ≤ x ≤ 0.6 form both. This leads to a heterogeneous formation process via two competing reaction pathways, that leads to a heterogeneous mixture of phases, during spin coating and rationalizes the compositional heterogeneity of mixed bromide-iodide samples even after annealing.
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Affiliation(s)
- Carolin Rehermann
- Young Investigator Group Hybrid Materials Formation and Scaling, HySPRINT Innovation Lab, Helmholtz-Zentrum Berlin für Materialen und Energie GmbH, Kekuléstraße 5, 12489 Berlin, Germany
| | - Aboma Merdasa
- Young Investigator Group Hybrid Materials Formation and Scaling, HySPRINT Innovation Lab, Helmholtz-Zentrum Berlin für Materialen und Energie GmbH, Kekuléstraße 5, 12489 Berlin, Germany
- Department of Physics, Lund University, Sölvegatan 14, 22362 Lund, Sweden
| | - Klara Suchan
- Chemical Physics and NanoLund, Lund University, PO Box 118, 22100 Lund, Sweden
| | - Vincent Schröder
- Institut für Physik, Institut für Chemie, IRIS Adlershof, Humboldt-Universität zu Berlin, 12489 Berlin, Germany
| | - Florian Mathies
- Young Investigator Group Hybrid Materials Formation and Scaling, HySPRINT Innovation Lab, Helmholtz-Zentrum Berlin für Materialen und Energie GmbH, Kekuléstraße 5, 12489 Berlin, Germany
| | - Eva L Unger
- Young Investigator Group Hybrid Materials Formation and Scaling, HySPRINT Innovation Lab, Helmholtz-Zentrum Berlin für Materialen und Energie GmbH, Kekuléstraße 5, 12489 Berlin, Germany
- Chemical Physics and NanoLund, Lund University, PO Box 118, 22100 Lund, Sweden
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46
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Limmer DT, Ginsberg NS. Photoinduced phase separation in the lead halides is a polaronic effect. J Chem Phys 2020; 152:230901. [PMID: 32571034 DOI: 10.1063/1.5144291] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We present a perspective on recent observations of the photoinduced phase separation of halides in multi-component lead-halide perovskites. The spontaneous phase separation of an initial homogeneous solid solution under steady-state illumination conditions is found experimentally to be reversible, stochastic, weakly dependent on morphology, yet strongly dependent on composition and thermodynamic state. Regions enriched in a specific halide species that form upon phase separation are self-limiting in size, pinned to specific compositions, and grow in number in proportion to the steady-state carrier concentration until saturation. These empirical observations of robustness rule out explanations based on specific defect structures and point to the local modulation of an existing miscibility phase transition in the presence of excess charge carriers. A model for rationalizing existing observations based on the coupling between composition, strain, and charge density fluctuations through the formation of polarons is reviewed.
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Affiliation(s)
- David T Limmer
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - Naomi S Ginsberg
- Department of Chemistry, University of California, Berkeley, California 94720, USA
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47
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Xu J, Boyd CC, Yu ZJ, Palmstrom AF, Witter DJ, Larson BW, France RM, Werner J, Harvey SP, Wolf EJ, Weigand W, Manzoor S, van Hest MFAM, Berry JJ, Luther JM, Holman ZC, McGehee MD. Triple-halide wide-band gap perovskites with suppressed phase segregation for efficient tandems. Science 2020; 367:1097-1104. [PMID: 32139537 DOI: 10.1126/science.aaz5074] [Citation(s) in RCA: 230] [Impact Index Per Article: 57.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2019] [Revised: 12/05/2019] [Accepted: 01/29/2020] [Indexed: 12/20/2022]
Abstract
Wide-band gap metal halide perovskites are promising semiconductors to pair with silicon in tandem solar cells to pursue the goal of achieving power conversion efficiency (PCE) greater than 30% at low cost. However, wide-band gap perovskite solar cells have been fundamentally limited by photoinduced phase segregation and low open-circuit voltage. We report efficient 1.67-electron volt wide-band gap perovskite top cells using triple-halide alloys (chlorine, bromine, iodine) to tailor the band gap and stabilize the semiconductor under illumination. We show a factor of 2 increase in photocarrier lifetime and charge-carrier mobility that resulted from enhancing the solubility of chlorine by replacing some of the iodine with bromine to shrink the lattice parameter. We observed a suppression of light-induced phase segregation in films even at 100-sun illumination intensity and less than 4% degradation in semitransparent top cells after 1000 hours of maximum power point (MPP) operation at 60°C. By integrating these top cells with silicon bottom cells, we achieved a PCE of 27% in two-terminal monolithic tandems with an area of 1 square centimeter.
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Affiliation(s)
- Jixian Xu
- Chemical and Biological Engineering, University of Colorado, Boulder, CO 80309, USA. .,National Renewable Energy Laboratory, Golden, CO 80401, USA.,CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Caleb C Boyd
- National Renewable Energy Laboratory, Golden, CO 80401, USA.,Materials Science and Engineering, Stanford University, Stanford, CA 94305, USA
| | - Zhengshan J Yu
- School of Electrical, Computer, and Energy Engineering, Arizona State University, Tempe, AZ 85281, USA
| | | | - Daniel J Witter
- Chemical and Biological Engineering, University of Colorado, Boulder, CO 80309, USA.,National Renewable Energy Laboratory, Golden, CO 80401, USA
| | - Bryon W Larson
- National Renewable Energy Laboratory, Golden, CO 80401, USA
| | - Ryan M France
- National Renewable Energy Laboratory, Golden, CO 80401, USA
| | - Jérémie Werner
- Chemical and Biological Engineering, University of Colorado, Boulder, CO 80309, USA.,National Renewable Energy Laboratory, Golden, CO 80401, USA
| | | | - Eli J Wolf
- National Renewable Energy Laboratory, Golden, CO 80401, USA.,Materials Science and Engineering, Stanford University, Stanford, CA 94305, USA
| | - William Weigand
- School of Electrical, Computer, and Energy Engineering, Arizona State University, Tempe, AZ 85281, USA
| | - Salman Manzoor
- School of Electrical, Computer, and Energy Engineering, Arizona State University, Tempe, AZ 85281, USA
| | | | - Joseph J Berry
- National Renewable Energy Laboratory, Golden, CO 80401, USA
| | | | - Zachary C Holman
- School of Electrical, Computer, and Energy Engineering, Arizona State University, Tempe, AZ 85281, USA
| | - Michael D McGehee
- Chemical and Biological Engineering, University of Colorado, Boulder, CO 80309, USA. .,National Renewable Energy Laboratory, Golden, CO 80401, USA.,Materials Science and Engineering, University of Colorado, Boulder, CO 80309, USA
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48
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Vicente JR, Chen J. Phase Segregation and Photothermal Remixing of Mixed-Halide Lead Perovskites. J Phys Chem Lett 2020; 11:1802-1807. [PMID: 31995980 PMCID: PMC8409127 DOI: 10.1021/acs.jpclett.9b03734] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Mixed-halide lead perovskites (MHPs) are promising materials for photovoltaics and optoelectronics due to their highly tunable band gaps. However, they phase segregate under continuous illumination or an electric field, the mechanism of which is still under debate. Herein we systematically measure the phase segregation behavior of polymer-encapsulated CH3NH3Pb(BrxI1-x)3 MHPs as a function of excitation intensity and the nominal halide ratio by in situ photoluminescence microspectroscopy and observe surprising phase dynamics at the beginning of the illumination. The initial phase segregation to I-rich and Br-rich phases is observed followed by the formation of a new mixed-halide phase within several seconds that has not been reported before. We propose that the photothermal effect is amplified at the small-size I-rich domains, which significantly changes the local phase segregation in the otherwise uniform film within milliseconds after illumination.
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Affiliation(s)
- Juvinch R. Vicente
- Department of Chemistry and Biochemistry, Ohio University, Athens, OH 45701, USA
- Nanoscale and Quantum Phenomena Institute, Ohio University, Athens, OH 45701, USA
- Department of Chemistry, University of the Philippines Visayas, Miagao, Iloilo 5023, Philippines
| | - Jixin Chen
- Department of Chemistry and Biochemistry, Ohio University, Athens, OH 45701, USA
- Nanoscale and Quantum Phenomena Institute, Ohio University, Athens, OH 45701, USA
- Corresponding Author: Jixin Chen:
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49
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Huang L, Zhang D, Bu S, Peng R, Wei Q, Ge Z. Synergistic Interface Energy Band Alignment Optimization and Defect Passivation toward Efficient and Simple-Structured Perovskite Solar Cell. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2020; 7:1902656. [PMID: 32195090 DOI: 10.1002/aenm.201902650] [Citation(s) in RCA: 166] [Impact Index Per Article: 41.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Revised: 12/12/2019] [Indexed: 05/28/2023]
Abstract
Efficient electron transport layer-free perovskite solar cells (ETL-free PSCs) with cost-effective and simplified design can greatly promote the large area flexible application of PSCs. However, the absence of ETL usually leads to the mismatched indium tin oxide (ITO)/perovskite interface energy levels, which limits charge transfer and collection, and results in severe energy loss and poor device performance. To address this, a polar nonconjugated small-molecule modifier is introduced to lower the work function of ITO and optimize interface energy level alignment by virtue of an inherent dipole, as verified by photoemission spectroscopy and Kelvin probe force microscopy measurements. The resultant barrier-free ITO/perovskite contact favors efficient charge transfer and suppresses nonradiative recombination, endowing the device with enhanced open circuit voltage, short circuit current density, and fill factor, simultaneously. Accordingly, power conversion efficiency increases greatly from 12.81% to a record breaking 20.55%, comparable to state-of-the-art PSCs with a sophisticated ETL. Also, the stability is enhanced with decreased hysteresis effect due to interface defect passivation and inhibited interface charge accumulation. This work facilitates the further development of highly efficient, flexible, and recyclable ETL-free PSCs with simplified design and low cost by interface electronic structure engineering through facile electrode modification.
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Affiliation(s)
- Like Huang
- Ningbo Institute of Materials Technology and Engineering (NIMTE) Chinese Academy of Sciences (CAS) Ningbo 315201 China
| | - Danli Zhang
- Ningbo Institute of Materials Technology and Engineering (NIMTE) Chinese Academy of Sciences (CAS) Ningbo 315201 China
| | - Shixiao Bu
- Ningbo Institute of Materials Technology and Engineering (NIMTE) Chinese Academy of Sciences (CAS) Ningbo 315201 China
| | - Ruixiang Peng
- Ningbo Institute of Materials Technology and Engineering (NIMTE) Chinese Academy of Sciences (CAS) Ningbo 315201 China
| | - Qiang Wei
- Ningbo Institute of Materials Technology and Engineering (NIMTE) Chinese Academy of Sciences (CAS) Ningbo 315201 China
| | - Ziyi Ge
- Ningbo Institute of Materials Technology and Engineering (NIMTE) Chinese Academy of Sciences (CAS) Ningbo 315201 China
- Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing 100049 P. R. China
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50
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Yuan Y, Yao Q, Zhang J, Wang K, Zhang W, Zhou T, Sun H, Ding J. Negative photoconductivity in Cs4PbBr6 single crystal. Phys Chem Chem Phys 2020; 22:14276-14283. [DOI: 10.1039/d0cp02004d] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Negative photoconductivity is firstly observed in large size Cs4PbBr6 single crystal that grown from Cs-rich solution. The Br vacancy and free excitons are responsible for this novel phenomena.
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Affiliation(s)
- Ye Yuan
- College of Materials Science and Engineering
- Shandong University of Science and Technology
- Qingdao 266590
- China
| | - Qing Yao
- College of Materials Science and Engineering
- Shandong University of Science and Technology
- Qingdao 266590
- China
| | - Jie Zhang
- College of Materials Science and Engineering
- Shandong University of Science and Technology
- Qingdao 266590
- China
| | - Kaiyu Wang
- College of Materials Science and Engineering
- Shandong University of Science and Technology
- Qingdao 266590
- China
| | - Weiwei Zhang
- College of Materials Science and Engineering
- Shandong University of Science and Technology
- Qingdao 266590
- China
| | | | - Haiqing Sun
- College of Materials Science and Engineering
- Shandong University of Science and Technology
- Qingdao 266590
- China
| | - Jianxu Ding
- College of Materials Science and Engineering
- Shandong University of Science and Technology
- Qingdao 266590
- China
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