1
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Ghosh A, Paul S, Das M, Sarkar PK, Bhardwaj P, Sheet G, Das S, Kalimuddin S, Datta A, Acharya S. Switchable Bulk Photovoltaic Effect in Intrinsically Ferroelectric 3D All-Inorganic CsPbBr 3 Perovskite Nanocrystals. ACS NANO 2024; 18:23310-23319. [PMID: 39158149 DOI: 10.1021/acsnano.4c06297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/20/2024]
Abstract
Ferroelectric all-inorganic halide perovskite nanocrystals with both spontaneous polarization and visible light absorption are promising candidates for designing ferroelectric photovoltaic applications. It remains a challenge to realize ferroelectric photovoltaic devices with all-inorganic halide perovskites that can be operated in the absence of an external electric field. Here we report that a popular all-inorganic halide perovskite nanocrystal, CsPbBr3, exhibits a ferroelectricity-driven photovoltaic effect under visible light in the absence of an external electric field. Pristine CsPbBr3 nanocrystals exhibit intrinsic ferroelectric key properties with a notable saturated polarization of ∼0.15 μC/cm2 and a high Curie temperature of 462 K, driven by the stereochemical activity of the Pb(II) lone pair. Furthermore, application of an external electric field allows the photovoltaic effect to be enhanced and the spontaneous polarization to be switched with the direction of the electric field. CsPbBr3 nanocrystals exhibit a robust fatigue performance and a prolonged photoresponse under continuous illumination in the absence of an external electric field. These findings establish all-inorganic halide perovskite nanocrystals as potential candidates for designing photoferroelectric devices by coupling optical functionalities and ferroelectric responses.
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Affiliation(s)
- Anashmita Ghosh
- School of Applied & Interdisciplinary Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Susmita Paul
- School of Applied & Interdisciplinary Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Mrinmay Das
- Department of Physics, Sister Nivedita University, Kolkata 700156, India
| | - Piyush Kanti Sarkar
- School of Applied & Interdisciplinary Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Pooja Bhardwaj
- Department of Physical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector 81, S. A. S. Nagar, Manauli P.O. 140306, India
| | - Goutam Sheet
- Department of Physical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector 81, S. A. S. Nagar, Manauli P.O. 140306, India
| | - Surajit Das
- School of Applied & Interdisciplinary Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Sk Kalimuddin
- School of Physical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Anuja Datta
- School of Applied & Interdisciplinary Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Somobrata Acharya
- School of Applied & Interdisciplinary Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
- Technical Research Centre (TRC), Indian Association for the Cultivation of Science, Kolkata 700032, India
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2
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He G, Yang D, Tao S, Yang L, Guo D, Zheng J, Li J, Chen J, Ma D. Synergistic nucleation regulation using 4,4',4''-tris(carbazol-9-yl)-triphenylamine and moisture for stably air-processed high-performance perovskite photodetectors. NANOSCALE 2024. [PMID: 38426276 DOI: 10.1039/d3nr06513h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/02/2024]
Abstract
Perovskite photodetectors (PPDs) offer a promising solution with low cost and high responsivity, addressing the limitations of traditional inorganic photodetectors. However, there is still room for improvement in terms of the dark current and stability of air-processed PPDs. In this study, 4,4',4''-tris(carbazol-9-yl)-triphenylamine (TCTA) was utilized as a nucleation agent to enhance the quality of perovskite films. The synergistic effect of TCTA and moisture promotes rapid nucleation of PbI2-PbCl2, resulting in an increased nucleation rate and the elimination of pinholes in the film. By employing additive engineering, we obtained a PbI2-PbCl2 layer with high coverage, leading to a low density of traps in the corresponding perovskite film. Consequently, the modified PPD exhibits a remarkable reduction in dark current density by over one order of magnitude, reaching 2.4 × 10-10 A cm-2 at -10 mV, along with a large linear dynamic range (LDR) of 183 dB. Furthermore, the resulting PPD demonstrates remarkable stability, retaining 90% of the initial external quantum efficiency (EQE) value even after continuous operation for over 3200 hours. Owing to a fast response time in the nanosecond range, the PPD could convert modulated light signals into electrical signals at a speed of 588 Kbit s-1, highlighting the great potential in the field of optical communication.
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Affiliation(s)
- Guo He
- State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, 381 Wushan Road, Guangzhou 510640, China.
- School of Physics and Optoelectronics, South China University of Technology, 381 Wushan Road, Guangzhou 510640, China
| | - Dezhi Yang
- State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, 381 Wushan Road, Guangzhou 510640, China.
- Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology, 381 Wushan Road, Guangzhou 510640, China
| | - Sizhe Tao
- State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, 381 Wushan Road, Guangzhou 510640, China.
| | - Liqing Yang
- State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, 381 Wushan Road, Guangzhou 510640, China.
| | - Dechao Guo
- State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, 381 Wushan Road, Guangzhou 510640, China.
| | - Jingbo Zheng
- State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, 381 Wushan Road, Guangzhou 510640, China.
| | - Ji Li
- State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, 381 Wushan Road, Guangzhou 510640, China.
| | - Jiangshan Chen
- State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, 381 Wushan Road, Guangzhou 510640, China.
- Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology, 381 Wushan Road, Guangzhou 510640, China
| | - Dongge Ma
- State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, 381 Wushan Road, Guangzhou 510640, China.
- Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, 381 Wushan Road, Guangzhou 510640, China
- Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology, 381 Wushan Road, Guangzhou 510640, China
- Guangdong-Hong Kong-Macao Joint Laboratory of Optoelectronic and Magnetic Functional Materials, South China University of Technology, 381 Wushan Road, Guangzhou 510640, China
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3
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Wang Z, Shu S, Wei X, Liang R, Ke S, Shu L, Catalan G. Flexophotovoltaic Effect and Above-Band-Gap Photovoltage Induced by Strain Gradients in Halide Perovskites. PHYSICAL REVIEW LETTERS 2024; 132:086902. [PMID: 38457719 DOI: 10.1103/physrevlett.132.086902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Accepted: 12/05/2023] [Indexed: 03/10/2024]
Abstract
We have measured the flexophotovoltaic effect of single crystals of halide perovskites MAPbBr_{3} and MAPbI_{3}, as well as the benchmark oxide perovskite SrTiO_{3}. For halide perovskites, the flexophotovoltaic effect is found to be orders of magnitude larger than for SrTiO_{3}, and indeed large enough to induce photovoltages bigger than the band gap. Moreover, we find that in MAPbI_{3} the flexophotovoltaic effect is additional to a native bulk photovoltaic response that is switchable and ferroelectric-like. The results suggest that strain gradient engineering can be a powerful tool to modify the photovoltaic output even in already well-established photovoltaic materials.
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Affiliation(s)
- Zhiguo Wang
- School of Physics and Materials Science, Nanchang University, Nanchang 330031, People's Republic of China
| | - Shengwen Shu
- College of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350108, People's Republic of China
| | - Xiaoyong Wei
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education and International Center for Dielectric Research, Xi'an Jiao Tong University, Xi'an 710049, People's Republic of China
| | - Renhong Liang
- School of Physics and Materials Science, Nanchang University, Nanchang 330031, People's Republic of China
| | - Shanming Ke
- School of Physics and Materials Science, Nanchang University, Nanchang 330031, People's Republic of China
| | - Longlong Shu
- School of Physics and Materials Science, Nanchang University, Nanchang 330031, People's Republic of China
| | - Gustau Catalan
- Institucio Catalana de Recerca i Estudis Avançats (ICREA), Barcelona 08010, Catalonia
- Institut Catala de Nanociencia i Nanotecnologia (ICN2), CSIC-BIST, Campus Universitat Autonoma de Barcelona, Barcelona 08193, Catalonia
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4
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Wang H, Bao Y, Li J, Li D, An M, Tang L, Li J, Tang H, Chi Y, Xu J, Yang Y. Highly Anisotropic Polarization Induced by Electrical Poling in Single-Crystalline All-Inorganic Perovskite Nanoplates. J Phys Chem Lett 2023; 14:9943-9950. [PMID: 37903345 DOI: 10.1021/acs.jpclett.3c02394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2023]
Abstract
The coupled ionic and electronic transport in halide perovskites opens up new possibilities for semiconductor iontronic devices beyond solar cells. Nevertheless, the fundamental understanding of ionic behavior at the microscale remains vague, largely because of the inhomogeneity in polycrystalline thin films. Here, we show that the ion dynamics in single-crystalline perovskite nanoplates (NPs) are significantly different and that an external bias may induce highly anisotropic ionic transport in the NPs, thereby leading to a greatly enhanced local electric field. Using modified scanning photocurrent microscopy (SPCM), the origin of the photocurrent is pinpointed to the cathode region of the NP device, where subsequent energy dispersive spectroscopy (EDS) characterization confirms a large accumulation of halogen vacancies. In addition, the Kelvin probe force microscopy (KPFM) measurement demonstrates a strong built-in electric field within a submicron length near the cathode, which alters the local electronic structure for efficient photo carrier separation. Such field-induced ionic behavior deepens the understanding of ion dynamics in perovskites and promotes scale-down of perovskite micro- and nanoiontronic and ion-optoelectronic devices.
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Affiliation(s)
- Hengshan Wang
- School of Microelectronics, Dalian University of Technology, No. 321 Tuqiang Road, Dalian 116620, China
| | - Yanan Bao
- School of Microelectronics, Dalian University of Technology, No. 321 Tuqiang Road, Dalian 116620, China
| | - Jing Li
- School of Microelectronics, Dalian University of Technology, No. 321 Tuqiang Road, Dalian 116620, China
- Key Laboratory of Materials Modification by Laser, Ion, and Electron Beams (Ministry of Education), School of Physics, Dalian University of Technology, No. 2 Linggong Road, Dalian 116024, China
| | - Dongwen Li
- Jilin Provincial Key Laboratory of Architectural Electricity & Comprehensive Energy Saving, School of Electrical Engineering and Computer, Jilin Jianzhu University, Changchun 130118, China
| | - Meiqi An
- School of Microelectronics, Dalian University of Technology, No. 321 Tuqiang Road, Dalian 116620, China
| | - Lingzhi Tang
- School of Microelectronics, Dalian University of Technology, No. 321 Tuqiang Road, Dalian 116620, China
| | - Jianliang Li
- School of Microelectronics, Dalian University of Technology, No. 321 Tuqiang Road, Dalian 116620, China
| | - Huayi Tang
- School of Microelectronics, Dalian University of Technology, No. 321 Tuqiang Road, Dalian 116620, China
| | - Yaodan Chi
- Jilin Provincial Key Laboratory of Architectural Electricity & Comprehensive Energy Saving, School of Electrical Engineering and Computer, Jilin Jianzhu University, Changchun 130118, China
| | - Jiao Xu
- School of Microelectronics, Dalian University of Technology, No. 321 Tuqiang Road, Dalian 116620, China
| | - Yiming Yang
- School of Microelectronics, Dalian University of Technology, No. 321 Tuqiang Road, Dalian 116620, China
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5
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Bai D, Zheng D, Yang S, Yu F, Zhu X, Peng L, Wang L, Liu J, Yang D, Liu SF. Surface modulation for highly efficient and stable perovskite solar cells. RSC Adv 2023; 13:28097-28103. [PMID: 37746342 PMCID: PMC10517147 DOI: 10.1039/d3ra00809f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Accepted: 03/16/2023] [Indexed: 09/26/2023] Open
Abstract
Defects formed by halide ion escape and wettability of the perovskite absorber are essential limiting factors in achieving high performance of perovskite solar cells (PSCs). Herein, a series of ionic organic modulators are designed to contain halide anions to prevent defect formation and improve the surface tension of the perovskite absorber. It was found that the surface modulator containing Br anions is the most effective one due to its capability in bonding with the undercoordinated Pb2+ ions to reduce charge recombination. Moreover, this surface modulator effectively creates a suitable energy level between the perovskite and hole transport layer to promote carrier transfer. In addition, the surface modulator forms a chemisorbed capping layer on the perovskite surface to improve its hydrophobicity. As a result, the efficiency of PSCs based on surface modulators containing Br anion enhances to 23.32% from 21.08% of the control device. The efficiency of unencapsulated PSCs with a surface modulator retains 75.42% of its initial value under about 35% humidity stored in the air for 28 days, while the control device only maintained 44.49% of its initial efficiency. The excellent stability originates from the hydrophobic perovskite surface after capping the surface modulator.
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Affiliation(s)
- Dongliang Bai
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University Xi'an 710119 China
| | - Dexu Zheng
- China National Nuclear Power Co., Ltd. Beijing 100097 China
| | - Shaoan Yang
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian 116023 China
| | - Fengyang Yu
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian 116023 China
| | - Xuejie Zhu
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University Xi'an 710119 China
| | - Lei Peng
- China National Nuclear Power Co., Ltd. Beijing 100097 China
| | - Likun Wang
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian 116023 China
| | - Jishuang Liu
- China National Nuclear Power Co., Ltd. Beijing 100097 China
| | - Dong Yang
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian 116023 China
| | - Shengzhong Frank Liu
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, 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, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian 116023 China
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6
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Vats G, Hodges B, Ferguson AJ, Wheeler LM, Blackburn JL. Optical Memory, Switching, and Neuromorphic Functionality in Metal Halide Perovskite Materials and Devices. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2205459. [PMID: 36120918 DOI: 10.1002/adma.202205459] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Revised: 08/20/2022] [Indexed: 06/15/2023]
Abstract
Metal halide perovskite based materials have emerged over the past few decades as remarkable solution-processable optoelectronic materials with many intriguing properties and potential applications. These emerging materials have recently been considered for their promise in low-energy memory and information processing applications. In particular, their large optical cross-sections, high photoconductance contrast, large carrier-diffusion lengths, and mixed electronic/ionic transport mechanisms are attractive for enabling memory elements and neuromorphic devices that are written and/or read in the optical domain. Here, recent progress toward memory and neuromorphic functionality in metal halide perovskite materials and devices where photons are used as a critical degree of freedom for switching, memory, and neuromorphic functionality is reviewed.
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Affiliation(s)
- Gaurav Vats
- National Renewable Energy Laboratory, Golden, CO, 80401, USA
- Department of Physics and Astronomy, Katholieke Universiteit Leuven, Celestijnenlaan 200D, Leuven, B-3001, Belgium
| | - Brett Hodges
- National Renewable Energy Laboratory, Golden, CO, 80401, USA
| | | | - Lance M Wheeler
- National Renewable Energy Laboratory, Golden, CO, 80401, USA
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7
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Zhang H, Pfeifer L, Zakeeruddin SM, Chu J, Grätzel M. Tailoring passivators for highly efficient and stable perovskite solar cells. Nat Rev Chem 2023; 7:632-652. [PMID: 37464018 DOI: 10.1038/s41570-023-00510-0] [Citation(s) in RCA: 45] [Impact Index Per Article: 45.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/30/2023] [Indexed: 07/20/2023]
Abstract
There is an ongoing global effort to advance emerging perovskite solar cells (PSCs), and many of these endeavours are focused on developing new compositions, processing methods and passivation strategies. In particular, the use of passivators to reduce the defects in perovskite materials has been demonstrated to be an effective approach for enhancing the photovoltaic performance and long-term stability of PSCs. Organic passivators have received increasing attention since the late 2010s as their structures and properties can readily be modified. First, this Review discusses the main types of defect in perovskite materials and reviews their properties. We examine the deleterious impact of defects on device efficiency and stability and highlight how defects facilitate extrinsic degradation pathways. Second, the proven use of different passivator designs to mitigate these negative effects is discussed, and possible defect passivation mechanisms are presented. Finally, we propose four specific directions for future research, which, in our opinion, will be crucial for unlocking the full potential of PSCs using the concept of defect passivation.
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Affiliation(s)
- Hong Zhang
- State Key Laboratory of Photovoltaic Science and Technology, Shanghai Frontiers Science Research Base of Intelligent Optoelectronics and Perception, Institute of Optoelectronics, Fudan University, Shanghai, P. R. China.
- Department of Materials Science, Fudan University, Shanghai, P. R. China.
| | - Lukas Pfeifer
- Laboratory of Photonics and Interfaces, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland.
| | - Shaik M Zakeeruddin
- Laboratory of Photonics and Interfaces, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Junhao Chu
- State Key Laboratory of Photovoltaic Science and Technology, Shanghai Frontiers Science Research Base of Intelligent Optoelectronics and Perception, Institute of Optoelectronics, Fudan University, Shanghai, P. R. China
- Department of Materials Science, Fudan University, Shanghai, P. R. China
| | - Michael Grätzel
- Laboratory of Photonics and Interfaces, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland.
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8
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Zubair M, Ahad SA, Amiinu IS, Lebedev VA, Mishra M, Geaney H, Singh S, Ryan KM. Colloidal synthesis of the mixed ionic-electronic conducting NaSbS 2 nanocrystals. NANOSCALE HORIZONS 2023; 8:1262-1272. [PMID: 37404207 DOI: 10.1039/d3nh00097d] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/06/2023]
Abstract
Solution-based synthesis of mixed ionic and electronic conductors (MIECs) has enabled the development of novel inorganic materials with implications for a wide range of energy storage applications. However, many technologically relevant MIECs contain toxic elements (Pb) or are prepared by using traditional high-temperature solid-state synthesis. Here, we provide a simple, low-temperature and size-tunable (50-90 nm) colloidal hot injection approach for the synthesis of NaSbS2 based MIECs using widely available and non-toxic precursors. Key synthetic parameters (cationic precursor, reaction temperature, and ligand) are examined to regulate the shape and size of the NaSbS2 nanocrystals (NCs). FTIR studies revealed that ligands with carboxylate functionality are coordinated to the surface of the synthesized NaSbS2 NCs. The synthesized NaSbS2 nanocrystals have electronic and ionic conductivities of 3.31 × 10-10 (e-) and 1.9 × 10-5 (Na+) S cm-1 respectively, which are competitive with the ionic and electrical conductivities of perovskite materials generated by solid-state reactions. This research gives a mechanistic understanding and post-synthetic evaluation of parameters influencing the formation of sodium antimony chalcogenides materials.
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Affiliation(s)
- Maria Zubair
- Department of Chemical Sciences and Bernal Institute, University of Limerick, Limerick, Ireland.
| | - Syed Abdul Ahad
- Department of Chemical Sciences and Bernal Institute, University of Limerick, Limerick, Ireland.
| | - Ibrahim Saana Amiinu
- Department of Chemical Sciences and Bernal Institute, University of Limerick, Limerick, Ireland.
| | - Vasily A Lebedev
- Department of Chemical Sciences and Bernal Institute, University of Limerick, Limerick, Ireland.
| | - Mohini Mishra
- Department of Chemical Sciences and Bernal Institute, University of Limerick, Limerick, Ireland.
| | - Hugh Geaney
- Department of Chemical Sciences and Bernal Institute, University of Limerick, Limerick, Ireland.
| | - Shalini Singh
- Department of Chemical Sciences and Bernal Institute, University of Limerick, Limerick, Ireland.
| | - Kevin M Ryan
- Department of Chemical Sciences and Bernal Institute, University of Limerick, Limerick, Ireland.
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9
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Liu Y, Guo W, Hua L, Zeng X, Yang T, Fan Q, Ma Y, Gao C, Sun Z, Luo J. Giant Polarization Sensitivity via the Anomalous Photovoltaic Effect in a Two-Dimensional Perovskite Ferroelectric. J Am Chem Soc 2023; 145:16193-16199. [PMID: 37462120 DOI: 10.1021/jacs.3c05020] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/27/2023]
Abstract
Polarization sensitivity, which shows great potential in photoelectric detection, is expected to be significantly improved by the ferroelectric anomalous photovoltaic (APV) effect. However, it is challenging to explore new APV-active ferroelectrics due to severe polarization fatigue induced by the leakage current of photoexcited carriers. For the first time, we report a strong APV effect in a 2D hybrid perovskite ferroelectric assembled by alloying mixed organic cations, (HA)2(EA)2Pb3Br10 (1, where HA+ is n-hexylammonium and EA+ is ethylammonium), which has a large spontaneous polarization ∼3.8 μC/cm2 and high a Curie temperature ∼378 K. Its ferroelectricity allows a strong APV effect with an above-bandgap photovoltage up to 7.4 V, which exceeds its bandgap (∼2.7 eV). Most strikingly, based on the dependence on polarized-light angle, this strong APV effect renders the highest level of polarization sensitivity with a giant current ratio of ∼25, far beyond other 2D single-phase materials. This study sheds light on the exploration of APV-active ferroelectrics and inspires their future high-performance optoelectronic device applications.
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Affiliation(s)
- Yi Liu
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, Fujian, People's Republic of China
| | - Wuqian Guo
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, Fujian, People's Republic of China
- University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100039, People's Republic of China
| | - Lina Hua
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, Fujian, People's Republic of China
| | - Xi Zeng
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, Fujian, People's Republic of China
| | - Tian Yang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, Fujian, People's Republic of China
| | - Qingshun Fan
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, Fujian, People's Republic of China
| | - Yu Ma
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, Fujian, People's Republic of China
- University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100039, People's Republic of China
| | - Changhao Gao
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, Fujian, People's Republic of China
| | - Zhihua Sun
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, Fujian, People's Republic of China
- University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100039, People's Republic of China
- Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou 350108, Fujian, People's Republic of China
| | - Junhua Luo
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, Fujian, People's Republic of China
- University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100039, People's Republic of China
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10
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Hua L, Tang L, Liu Y, Han S, Xu H, Guo W, Ma Y, Liu X, Luo J, Sun Z. Acquiring Bulk Anomalous Photovoltaic Effect in Single Crystals of a Lead-Free Double Perovskite with Aromatic and Alkali Mixed-Cations. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2207393. [PMID: 36651018 DOI: 10.1002/smll.202207393] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 12/19/2022] [Indexed: 06/17/2023]
Abstract
The bulk anomalous photovoltaic (BAPV) effect of acentric materials refers to a distinct concept from traditional semiconductor-based devices, of which the above-bandgap photovoltage hints at a promise for solar-energy conversion. However, it is still a challenge to exploit new BAPV-active systems due to the lacking of knowledge on the structural origin of this concept. BAPV effects in single crystals of a 2D lead-free double perovskite, (BBA)2 CsAgBiBr7 (1, BBA = 4-bromobenzylammonium), tailored by mixing aromatic and alkali cations in the confined architecture to form electric polarization are acquired here. Strikingly, BAPV effects manifested by above-bandgap photovoltage (VOC ) show unique attributes of directional anisotropy and positive dependence on electrode spacing. The driving source stems from orientations of the polar aromatic spacer and Cs+ ion drift, being different from the known built-in asymmetry photovoltaic heterojunctions. As the first demonstration of the BAPV effect in the double perovskites, the results will enrich the family of environmentally green BAPV-active candidates and further facilitate their new optoelectronic application.
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Affiliation(s)
- Lina Hua
- State Key Laboratory of Structure Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, P. R. China
| | - Liwei Tang
- State Key Laboratory of Structure Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, P. R. China
| | - Yi Liu
- State Key Laboratory of Structure Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Shiguo Han
- State Key Laboratory of Structure Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, P. R. China
| | - Haojie Xu
- State Key Laboratory of Structure Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Wuqian Guo
- State Key Laboratory of Structure Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Yu Ma
- State Key Laboratory of Structure Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Xitao Liu
- State Key Laboratory of Structure Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Junhua Luo
- State Key Laboratory of Structure Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, P. R. China
- Fujian Science and Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, Fujian, 350108, P. R. China
| | - Zhihua Sun
- State Key Laboratory of Structure Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
- Fujian Science and Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, Fujian, 350108, P. R. China
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11
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Chakraborty R, Rajput PK, Anilkumar GM, Maqbool S, Das R, Rahman A, Mandal P, Nag A. Rational Design of Non-Centrosymmetric Hybrid Halide Perovskites. J Am Chem Soc 2023; 145:1378-1388. [PMID: 36594717 DOI: 10.1021/jacs.2c12034] [Citation(s) in RCA: 15] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Structural non-centrosymmetry in semiconducting organic-inorganic hybrid halide perovskites can introduce functionalities like anomalous photovoltaics and nonlinear optical properties. Here we introduce a design principle to prepare Pb- and Bi-based two- and one-dimensional hybrid perovskites with polar non-centrosymmetric space groups. The design principle relies on creating dissimilar hydrogen and halogen bonding non-covalent interactions at the organic-inorganic interface. For example, in organic cations like I-(CH2)3-NH2(CH3)+ (MIPA), -CH3 is substituted by -CH2I at one end, and -NH3+ is substituted by -NH2(CH3)+ at the other end. These substitutions of two -H atoms by -I and -CH3 reduce the rotational symmetry of MIPA at both ends, compared to an unsubstituted cation, for example, H3C-(CH2)3-NH3+. Consequently, the dissimilar hydrogen-iodine and iodine-iodine interactions at the organic-inorganic interface of (MIPA)2PbI4 2D perovskites break the local inversion symmetries of Pb-I octahedra. Owing to this non-centrosymmetry, (MIPA)2PbI4 displays visible to infrared tunable nonlinear optical properties with second and third harmonic generation susceptibility values of 5.73 pm V-1 and 3.45 × 10-18 m2 V-2, respectively. Also, the single crystal shows photocurrent on shining visible light at no external bias, exhibiting anomalous photovoltaic effect arising from the structural asymmetry. The design strategy was extended to synthesize four new non-centrosymmetric hybrid perovskite compounds. Among them, one-dimensional (H3N-(CH2)3-NH(CH3)2)BiI5 shows a second harmonic generation susceptibility of 7.3 pm V-1 and a high anomalous photovoltaic open-circuit voltage of 22.6 V.
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Affiliation(s)
- Rayan Chakraborty
- Department of Chemistry, Indian Institute of Science Education and Research (IISER), Pune 411008, India
| | - Parikshit Kumar Rajput
- Department of Chemistry, Indian Institute of Science Education and Research (IISER), Pune 411008, India
| | - Gokul M Anilkumar
- Department of Physics, Indian Institute of Science Education and Research (IISER), Pune 411008, India
| | - Shabnum Maqbool
- Department of Chemistry, Indian Institute of Science Education and Research (IISER), Pune 411008, India
| | - Ranjan Das
- Solid State and Structural Chemistry Unit, Indian Institute of Science, Bengaluru 560012, India
| | - Atikur Rahman
- Department of Physics, Indian Institute of Science Education and Research (IISER), Pune 411008, India
| | - Pankaj Mandal
- Department of Chemistry, Indian Institute of Science Education and Research (IISER), Pune 411008, India
| | - Angshuman Nag
- Department of Chemistry, Indian Institute of Science Education and Research (IISER), Pune 411008, India
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12
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Li B, Shen T, Yun S. Recent progress of crystal orientation engineering in halide perovskite photovoltaics. MATERIALS HORIZONS 2023; 10:13-40. [PMID: 36415914 DOI: 10.1039/d2mh00980c] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Manipulating the crystallographic orientation of semiconductor crystals plays a vital role in fine-tuning their facet-dependent properties, such as surface properties, charge transfer properties, trap state density, and lattice strain. The success in crystal orientation engineering enables the preferential growth orientation of perovskite thin films with favorable crystal planes by precise nucleation manipulation and growth condition optimization, rendering the films with the unique optoelectronic properties to further improve the efficiency of perovskite solar cells (PSCs). However, the origin and impact of preferential crystallographic orientation of perovskite thin films on the corresponding photovoltaic performance of PSCs are still far from being well understood. Herein, we explore the crystal orientation-dependent optoelectronic properties of halide perovskites and their influence on the photovoltaic performance of PSCs. We summarize the basic strategies for crystal facet engineering in the fabrication of preferentially oriented perovskite thin films, with a focus on the oriented growth mechanism during thin film formation. Based on the above knowledge and the recent research progress in terms of crystal orientation engineering in PSCs, a brief outlook on the remaining challenges and perspectives are provided.
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Affiliation(s)
- Bo Li
- School of Materials and Engineering, Xi'an University of Architecture and Technology, Xi'an, Shaanxi, 710055, China.
| | - Ting Shen
- Department of Materials Science and Engineering, Clemson University, Clemson, SC, 29634, USA
| | - Sining Yun
- School of Materials and Engineering, Xi'an University of Architecture and Technology, Xi'an, Shaanxi, 710055, China.
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13
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Wei X, Zhang P, Xu T, Zhou H, Bai Y, Chen Q. Chemical approaches for electronic doping in photovoltaic materials beyond crystalline silicon. Chem Soc Rev 2022; 51:10016-10063. [PMID: 36398768 DOI: 10.1039/d2cs00110a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Electronic doping is applied to tailor the electrical and optoelectronic properties of semiconductors, which have been widely adopted in information and clean energy technologies, like integrated circuit fabrication and PVs. Though this concept has prevailed in conventional PVs, it has achieved limited success in the new-generation PV materials, particularly in halide perovskites, owing to their soft lattice nature and self-compensation by intrinsic defects. In this review, we summarize the evolution of the theoretical understanding and strategies of electronic doping from Si-based photovoltaics to thin-film technologies, e.g., GaAs, CdTe and Cu(In,Ga)Se2, and also cover the emerging PVs including halide perovskites and organic solar cells. We focus on the chemical approaches to electronic doping, emphasizing various chemical interactions/bonding throughout materials synthesis/modification to device fabrication/operation. Furthermore, we propose new classifications and models of electronic doping based on the physical and chemical properties of dopants, in the context of solid-state chemistry, which inspires further development of optoelectronics based on perovskites and other hybrid materials. Finally, we outline the effects of electronic doping in semiconducting materials and highlight the challenges that need to be overcome for reliable and controllable doping.
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Affiliation(s)
- Xueyuan Wei
- Experimental Centre for Advanced Materials, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, P. R. China.
| | - Pengxiang Zhang
- Experimental Centre for Advanced Materials, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, P. R. China.
| | - Tailai Xu
- Experimental Centre for Advanced Materials, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, P. R. China.
| | - Huanping Zhou
- 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.
| | - Qi Chen
- Experimental Centre for Advanced Materials, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, P. R. China.
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14
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Recent progress in perovskite solar cells: from device to commercialization. Sci China Chem 2022. [DOI: 10.1007/s11426-022-1426-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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15
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Dong ST, Fu Z, Yu M, Jiang JL, Jin X, Guo YH, Wang L, Zhang YM. An ion migration induced self-powered photoelectrical detector based on FAPbBr 3 single crystals. CrystEngComm 2022. [DOI: 10.1039/d1ce01707a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Irreversible ion migration was utilized to design a built-in electric field and energy band bending in a symmetrically structured Au/FAPbBr3/Au device, which successfully leads to a self-powered photoelectric device based on FAPbBr3 crystals.
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Affiliation(s)
- Song-Tao Dong
- Institute of Material Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, China
| | - Zhuang Fu
- Institute of Material Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, China
| | - Miaocheng Yu
- Institute of Material Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, China
| | - Jia-Ling Jiang
- Institute of Material Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, China
| | - Xiaoyun Jin
- Institute of Material Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, China
| | - Yu-Hang Guo
- Institute of Material Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, China
| | - Lei Wang
- Institute of Material Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, China
| | - Ya-Mei Zhang
- School of Science, Jiangsu University of Science and Technology, Zhenjiang, 212003, China
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16
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Zhao X, Liu T, Loo YL. Advancing 2D Perovskites for Efficient and Stable Solar Cells: Challenges and Opportunities. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2105849. [PMID: 34668250 DOI: 10.1002/adma.202105849] [Citation(s) in RCA: 44] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 09/06/2021] [Indexed: 05/20/2023]
Abstract
Perovskite solar cells (PSCs) have rapidly emerged as one of the hottest topics in the photovoltaics community owing to their high power-conversion efficiencies (PCE), and the promise to be produced at low cost. Among various PSCs, typical 3D perovskite-based solar cells deliver high PCE but they suffer from severe instability, which restricts their practical applications. In contrast to 3D perovskites, 2D perovskites that incorporate larger, less volatile, and generally more hydrophobic organic cations exhibit much improved thermal, chemical, and environmental stability. 2D perovskites can have different roles within a solar cell, either as the primary light absorber (2D PSCs), or as a capping layer atop a 3D perovskite absorbing layer (2D/3D PSCs). Tradeoffs between PCE and stability exist in both types of PSCs-2D PSCs are more stable but exhibit lower efficiency while 2D/3D PSCs deliver exciting efficiency but show relatively poor stability. To address this PCE/stability tradeoff, the challenges both the 2D and 2D/3D PSCs face are identified and select works the community has undertaken to overcome them are highlighted in this review. It is ended with several recommendations on how to further improve PSCs so their performance and stability can be commensurate with application requirements.
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Affiliation(s)
- Xiaoming Zhao
- Department of Chemical and Biological Engineering, Princeton University, Princeton, NJ, 08544, USA
| | - Tianran Liu
- Department of Chemical and Biological Engineering, Princeton University, Princeton, NJ, 08544, USA
- Department of Electrical and Computer Engineering, Princeton University, Princeton, NJ, 08544, USA
| | - Yueh-Lin Loo
- Department of Chemical and Biological Engineering, Princeton University, Princeton, NJ, 08544, USA
- Andlinger Center for Energy and the Environment, Princeton University, Princeton, NJ, 08544, USA
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17
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Pininti AR, Ball JM, Albaqami MD, Petrozza A, Caironi M. Time-Dependent Field Effect in Three-Dimensional Lead-Halide Perovskite Semiconductor Thin Films. ACS APPLIED ENERGY MATERIALS 2021; 4:10603-10609. [PMID: 34723138 PMCID: PMC8552216 DOI: 10.1021/acsaem.1c01558] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Indexed: 06/13/2023]
Abstract
Charge transport in three-dimensional metal-halide perovskite semiconductors is due to a complex combination of ionic and electronic contributions, and its study is particularly relevant in light of their successful applications in photovoltaics as well as other opto- and microelectronic applications. Interestingly, the observation of field effect at room temperature in transistors based on solution-processed, polycrystalline, three-dimensional perovskite thin films has been elusive. In this work, we study the time-dependent electrical characteristics of field-effect transistors based on the model methylammonium lead iodide semiconductor and observe the drastic variations in output current, and therefore of apparent charge carrier mobility, as a function of the applied gate pulse duration. We infer this behavior to the accumulation of ions at the grain boundaries, which hamper the transport of carriers across the FET channel. This study reveals the dynamic nature of the field effect in solution-processed metal-halide perovskites and offers an investigation methodology useful to characterize charge carrier transport in such emerging semiconductors.
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Affiliation(s)
- Anil Reddy Pininti
- Center
for Nano Science and Technology @PoliMi, Istituto Italiano di Tecnologia, via G. Pascoli 70/3, Milano 20133, Italy
- Physics
Department, Politecnico di Milano, Piazza L. da Vinci, 32, Milano 20133, Italy
| | - James M. Ball
- Center
for Nano Science and Technology @PoliMi, Istituto Italiano di Tecnologia, via G. Pascoli 70/3, Milano 20133, Italy
| | - Munirah D. Albaqami
- Chemistry
Department, College of Science, King Saud
University, Riyadh 11451, Saudi Arabia
| | - Annamaria Petrozza
- Center
for Nano Science and Technology @PoliMi, Istituto Italiano di Tecnologia, via G. Pascoli 70/3, Milano 20133, Italy
- Chemistry
Department, College of Science, King Saud
University, Riyadh 11451, Saudi Arabia
| | - Mario Caironi
- Center
for Nano Science and Technology @PoliMi, Istituto Italiano di Tecnologia, via G. Pascoli 70/3, Milano 20133, Italy
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18
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Manipulation of hot carrier cooling dynamics in two-dimensional Dion-Jacobson hybrid perovskites via Rashba band splitting. Nat Commun 2021; 12:3995. [PMID: 34183646 PMCID: PMC8239041 DOI: 10.1038/s41467-021-24258-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Accepted: 06/03/2021] [Indexed: 11/21/2022] Open
Abstract
Hot-carrier cooling processes of perovskite materials are typically described by a single parabolic band model that includes the effects of carrier-phonon scattering, hot phonon bottleneck, and Auger heating. However, little is known (if anything) about the cooling processes in which the spin-degenerate parabolic band splits into two spin-polarized bands, i.e., the Rashba band splitting effect. Here, we investigated the hot-carrier cooling processes for two slightly different compositions of two-dimensional Dion–Jacobson hybrid perovskites, namely, (3AMP)PbI4 and (4AMP)PbI4 (3AMP = 3-(aminomethyl)piperidinium; 4AMP = 4-(aminomethyl)piperidinium), using a combination of ultrafast transient absorption spectroscopy and first-principles calculations. In (4AMP)PbI4, upon Rashba band splitting, the spin-dependent scattering of hot electrons is responsible for accelerating hot-carrier cooling at longer delays. Importantly, the hot-carrier cooling of (4AMP)PbI4 can be extended by manipulating the spin state of the hot carriers. Our findings suggest a new approach for prolonging hot-carrier cooling in hybrid perovskites, which is conducive to further improving the performance of hot-carrier-based optoelectronic and spintronic devices. Hybrid perovskite is a promising class of material for optoelectronic applications due to the slow hot-carrier cooling, yet the process is not well-understood in material with Rashba band splitting. Here, the authors reveal spin-flipping and spin-dependent scattering of hot electrons are responsible for accelerating the cooling at longer delays.
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19
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Cao K, Huang Y, Ge M, Huang F, Shi W, Wu Y, Cheng Y, Qian J, Liu L, Chen S. Durable Defect Passivation of the Grain Surface in Perovskite Solar Cells with π-Conjugated Sulfamic Acid Additives. ACS APPLIED MATERIALS & INTERFACES 2021; 13:26013-26022. [PMID: 34048215 DOI: 10.1021/acsami.1c04601] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Defect passivation has shown an essential role in improving the efficiency and stability of perovskite solar cells (PSCs). Herein, an efficient and low-cost π-conjugated sulfamic acid additive, 4-aminobenzenesulfonic acid (4-ABSA), is used to realize durable defect passivation of PSCs. The incorporation of 4-ABSA not only constructs a compact and smooth perovskite film but is also capable of passivating both negative- and positive-charged defects derived from under-coordinated lead and halogen ions. Besides, the π-conjugated system in 4-ABSA can induce preferred perovskite crystal orientation and stabilize the coordination effect between 4-ABSA and perovskite grains. As a result, the inverted planar PSC incorporated with 4-ABSA additives demonstrates an improved power conversion efficiency (PCE) from 18.25 to 20.32%. Moreover, this 4-ABSA passivation agent also enhances the stability of devices, which retains 83.5% of its initial efficiency under ambient condition at 60 °C after 27 days. This work provides a π-conjugated sulfamic acid for durable defect passivation of perovskite optoelectronic devices.
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Affiliation(s)
- Kun Cao
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China
| | - Yue Huang
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China
| | - Mengru Ge
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China
| | - Fei Huang
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China
| | - Wenjian Shi
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China
| | - Yupei Wu
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China
| | - Yangfeng Cheng
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China
| | - Jie Qian
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China
| | - Lihui Liu
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China
| | - Shufen Chen
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China
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20
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Hao J, Kim YH, Habisreutinger SN, Harvey SP, Miller EM, Foradori SM, Arnold MS, Song Z, Yan Y, Luther JM, Blackburn JL. Low-energy room-temperature optical switching in mixed-dimensionality nanoscale perovskite heterojunctions. SCIENCE ADVANCES 2021; 7:7/18/eabf1959. [PMID: 33910894 PMCID: PMC8081365 DOI: 10.1126/sciadv.abf1959] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Accepted: 03/10/2021] [Indexed: 05/09/2023]
Abstract
Long-lived photon-stimulated conductance changes in solid-state materials can enable optical memory and brain-inspired neuromorphic information processing. It remains challenging to realize optical switching with low-energy consumption, and new mechanisms and design principles giving rise to persistent photoconductivity (PPC) can help overcome an important technological hurdle. Here, we demonstrate versatile heterojunctions between metal-halide perovskite nanocrystals and semiconducting single-walled carbon nanotubes that enable room-temperature, long-lived (thousands of seconds), writable, and erasable PPC. Optical switching and basic neuromorphic functions can be stimulated at low operating voltages with femto- to pico-joule energies per spiking event, and detailed analysis demonstrates that PPC in this nanoscale interface arises from field-assisted control of ion migration within the nanocrystal array. Contactless optical measurements also suggest these systems as potential candidates for photonic synapses that are stimulated and read in the optical domain. The tunability of PPC shown here holds promise for neuromorphic computing and other technologies that use optical memory.
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Affiliation(s)
- Ji Hao
- National Renewable Energy Laboratory, Golden, CO 80401, USA
| | - Young-Hoon Kim
- National Renewable Energy Laboratory, Golden, CO 80401, USA
| | | | | | - Elisa M Miller
- National Renewable Energy Laboratory, Golden, CO 80401, USA
| | | | | | | | - Yanfa Yan
- University of Toledo, Toledo, OH 43606, USA
| | - Joseph M Luther
- National Renewable Energy Laboratory, Golden, CO 80401, USA.
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21
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Shi J, Li Y, Li Y, Wu H, Luo Y, Li D, Meng Q. Eliminating the electric field response in a perovskite heterojunction solar cell to improve operational stability. Sci Bull (Beijing) 2021; 66:536-544. [PMID: 36654423 DOI: 10.1016/j.scib.2020.11.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Revised: 10/07/2020] [Accepted: 10/27/2020] [Indexed: 01/20/2023]
Abstract
Intrinsic and extrinsic ion migration is a very large threat to the operational stability of perovskite solar cells and is difficult to completely eliminate due to the low activation energy of ion migration and the existence of internal electric field. We propose a heterojunction route to help suppress ion migration, thus improving the operational stability of the cell from the perspective of eliminating the electric field response in the perovskite absorber. A heavily doped p-type (p+) thin layer semiconductor is introduced between the electron transporting layer (ETL) and perovskite absorber. The heterojunction charge depletion and electric field are limited to the ETL and p+ layers, while the perovskite absorber and hole transporting layer remain neutral. The p+ layer has a variety of candidate materials and is tolerant of defect density and carrier mobility, which makes this heterojunction route highly feasible and promising for use in practical applications.
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Affiliation(s)
- Jiangjian Shi
- Key Laboratory for Renewable Energy, Chinese Academy of Sciences, Beijing Key Laboratory for New Energy Materials and Devices, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Yiming Li
- Key Laboratory for Renewable Energy, Chinese Academy of Sciences, Beijing Key Laboratory for New Energy Materials and Devices, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Yusheng Li
- Key Laboratory for Renewable Energy, Chinese Academy of Sciences, Beijing Key Laboratory for New Energy Materials and Devices, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Huijue Wu
- Key Laboratory for Renewable Energy, Chinese Academy of Sciences, Beijing Key Laboratory for New Energy Materials and Devices, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Yanhong Luo
- Key Laboratory for Renewable Energy, Chinese Academy of Sciences, Beijing Key Laboratory for New Energy Materials and Devices, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; Department of Physics Science, University of Chinese Academy of Sciences, Beijing 100049, China; Songshan Lake Materials Laboratory, Dongguan 523808, China
| | - Dongmei Li
- Key Laboratory for Renewable Energy, Chinese Academy of Sciences, Beijing Key Laboratory for New Energy Materials and Devices, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; Department of Physics Science, University of Chinese Academy of Sciences, Beijing 100049, China; Songshan Lake Materials Laboratory, Dongguan 523808, China
| | - Qingbo Meng
- Key Laboratory for Renewable Energy, Chinese Academy of Sciences, Beijing Key Laboratory for New Energy Materials and Devices, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China; Songshan Lake Materials Laboratory, Dongguan 523808, China.
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22
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Kim G, An S, Hyeong SK, Lee SK, Kim M, Shin N. In Situ Vapor-Phase Halide Exchange of Patterned Perovskite Thin Films. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2006737. [PMID: 33619846 DOI: 10.1002/smll.202006737] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 12/31/2020] [Indexed: 06/12/2023]
Abstract
Metal halide perovskites (MHPs) exhibit optoelectronic properties that are dependent on their ionic composition, and the feasible exploitation of these properties for device applications requires the ability to control the ionic composition integrated with the patterning process. Herein, the halide exchange process of MHP thin films directly combined with the patterning process via a vapor transport method is demonstrated. Specifically, the patterned arrays of CH3 NH3 PbBr3 (MAPbBr3 ) are obtained by stepwise conversion from polymer-templated PbI2 thin films to CH3 NH3 PbI3 (MAPbI3 ), followed by halide exchange via precursor switching from CH3 NH3 I to CH3 NH3 Br. It is confirmed that the phase transformation from MAPbI3 patterns to MAPbBr3 shows time- and position-dependences on the substrate during halide exchange following the solid-solution model with Avrami kinetics. The photodetectors fabricated from the completely exchanged MAPbBr3 patterns display exceptional air stability and reversible detectivity from "apparent death" upon removing the adsorbed impurities, thereby suggesting the superior structural stability of perovskite patterns prepared through vapor-phase halide exchange. The results demonstrate the potential of chemical vapor deposition patterning of MHP materials in multicomponent optoelectronic device systems.
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Affiliation(s)
- Geemin Kim
- Department of Chemistry and Chemical Engineering, Inha University, Incheon, 22212, Republic of Korea
| | - Sol An
- Department of Chemistry and Chemical Engineering, Inha University, Incheon, 22212, Republic of Korea
| | - Seok-Ki Hyeong
- Institute of Advanced Composite Materials, Korea Institute of Science and Technology (KIST), Jeollabuk-do, 55324, Republic of Korea
| | - Seoung-Ki Lee
- Institute of Advanced Composite Materials, Korea Institute of Science and Technology (KIST), Jeollabuk-do, 55324, Republic of Korea
| | - Myungwoong Kim
- Department of Chemistry and Chemical Engineering, Inha University, Incheon, 22212, Republic of Korea
| | - Naechul Shin
- Department of Chemistry and Chemical Engineering, Inha University, Incheon, 22212, Republic of Korea
- Program in Biomedical Science & Engineering, Inha University, Incheon, 22212, Republic of Korea
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Mathur A, Li A, Maheshwari V. Nanoscale Architecture of Polymer-Organolead Halide Perovskite Films and the Effect of Polymer Chain Mobility on Device Performance. J Phys Chem Lett 2021; 12:1481-1489. [PMID: 33533616 DOI: 10.1021/acs.jpclett.1c00004] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The integration of polymer chains with organolead halide perovskite (MAPbI3) films, leading to enhanced stability and electro-optical performance, is critically affected by the molecular weight of chains. The molecular weight determines the mobility and volume of the chains, which affects the crystallization kinetics and, hence, perovskite grain size. The insulating nature of the chains is another critical factor that affects both ion migration and conduction of electronic charge. The combined effect of these factors leads to optimal performance with the use of medium-length chains. A simple model integrating the two effects accurately fits the response of the polymer-perovskite composite. Further characterization results show that the polymer-perovskite films have a three-layer architecture consisting of nanoscale polymer-rich top and bottom layers. These combined results show that the optimization of performance in polymer-perovskite devices depends critically on the size of the chains due to their multiple effects on the perovskite matrix.
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Affiliation(s)
- Avi Mathur
- Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada
| | - Alexander Li
- Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada
| | - Vivek Maheshwari
- Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada
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Lan C, Zou H, Wang L, Zhang M, Pan S, Ma Y, Qiu Y, Wang ZL, Lin Z. Revealing Electrical-Poling-Induced Polarization Potential in Hybrid Perovskite Photodetectors. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e2005481. [PMID: 33089555 DOI: 10.1002/adma.202005481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 09/23/2020] [Indexed: 06/11/2023]
Abstract
Despite recent rapid advances in metal halide perovskites for use in optoelectronics, the fundamental understanding of the electrical-poling-induced ion migration, accounting for many unusual attributes and thus performance in perovskite-based devices, remain comparatively elusive. Herein, the electrical-poling-promoted polarization potential is reported for rendering hybrid organic-inorganic perovskite photodetectors with high photocurrent and fast response time, displaying a tenfold enhancement in the photocurrent and a twofold decrease in the response time after an external electric field poling. First, a robust meniscus-assisted solution-printing strategy is employed to facilitate the oriented perovskite crystals over a large area. Subsequently, the electrical poling invokes the ion migration within perovskite crystals, thus inducing a polarization potential, as substantiated by the surface potential change assessed by Kelvin probe force microscopy. Such electrical-poling-induced polarization potential is responsible for the markedly enhanced photocurrent and largely shortened response time. This work presents new insights into the electrical-poling-triggered ion migration and, in turn, polarization potential as well as into the implication of the latter for optoelectronic devices with greater performance. As such, the utilization of ion-migration-produced polarization potential may represent an important endeavor toward a wide range of high-performance perovskite-based photodetectors, solar cells, transistors, scintillators, etc.
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Affiliation(s)
- Chuntao Lan
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
- Key Laboratory of Textile Science & Technology of Ministry of Education, College of Textiles, Donghua University, Shanghai, 201620, China
| | - Haiyang Zou
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Longfei Wang
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Meng Zhang
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Shuang Pan
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Ying Ma
- Key Laboratory of Textile Science & Technology of Ministry of Education, College of Textiles, Donghua University, Shanghai, 201620, China
| | - Yiping Qiu
- Key Laboratory of Textile Science & Technology of Ministry of Education, College of Textiles, Donghua University, Shanghai, 201620, China
| | - Zhong Lin Wang
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Zhiqun Lin
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
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25
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Kwon O, Seol D, Qiao H, Kim Y. Recent Progress in the Nanoscale Evaluation of Piezoelectric and Ferroelectric Properties via Scanning Probe Microscopy. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2020; 7:1901391. [PMID: 32995111 PMCID: PMC7507502 DOI: 10.1002/advs.201901391] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Revised: 06/05/2020] [Indexed: 05/21/2023]
Abstract
Piezoelectric and ferroelectric materials have garnered significant interest owing to their excellent physical properties and multiple potential applications. Accordingly, the need for evaluating piezoelectric and ferroelectric properties has also increased. The piezoelectric and ferroelectric properties are evaluated macroscopically using laser interferometers and polarization-electric field loop measurements. However, as the research focus is shifted from bulk to nanosized materials, scanning probe microscopy (SPM) techniques have been suggested as an alternative approach for evaluating piezoelectric and ferroelectric properties. In this Progress Report, the recent progress on the nanoscale evaluation of piezoelectric and ferroelectric properties of diverse materials using SPM-based methods is summarized. Among the SPM techniques, the focus is on recent studies that are related to piezoresponse force microscopy and conductive atomic force microscopy; further, the utilization of these two modes to understand piezoelectric and ferroelectric properties at the nanoscale level is discussed. This work can provide guidelines for evaluating the piezoelectric and ferroelectric properties of materials based on SPM techniques.
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Affiliation(s)
- Owoong Kwon
- School of Advanced Materials and Engineering & Research Center for Advanced Materials TechnologySungkyunkwan University (SKKU)Suwon16419Republic of Korea
| | - Daehee Seol
- School of Advanced Materials and Engineering & Research Center for Advanced Materials TechnologySungkyunkwan University (SKKU)Suwon16419Republic of Korea
| | - Huimin Qiao
- School of Advanced Materials and Engineering & Research Center for Advanced Materials TechnologySungkyunkwan University (SKKU)Suwon16419Republic of Korea
| | - Yunseok Kim
- School of Advanced Materials and Engineering & Research Center for Advanced Materials TechnologySungkyunkwan University (SKKU)Suwon16419Republic of Korea
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He J, Liu J, Hou Y, Wang Y, Yang S, Yang HG. Surface chelation of cesium halide perovskite by dithiocarbamate for efficient and stable solar cells. Nat Commun 2020; 11:4237. [PMID: 32843644 PMCID: PMC7447778 DOI: 10.1038/s41467-020-18015-5] [Citation(s) in RCA: 71] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Accepted: 08/01/2020] [Indexed: 12/20/2022] Open
Abstract
Surface engineering has been shown critical for the success of perovskite solar cells by passivating the surface enriched defects and mobile species. The discovery of surface modulators with superior interaction strength to perovskite is of paramount importance since they can retain reliable passivation under various environments. Here, we report a chelation strategy for surface engineering of CsPbI2Br perovskite, in which dithiocarbamate molecules can be coordinate to surface Pb sites via strong bidentate chelating bonding. Such chelated CsPbI2Br perovskite can realize excellent passivation of surface under-coordinated defects, reaching a champion power conversion efficiency of 17.03% and an open-circuit voltage of 1.37 V of CsPbI2Br solar cells. More importantly, our chelation strategy enabled excellent device stability by maintaining 98% of their initial efficiency for over 1400 h in ambient condition. Our findings provide scientific insights on the surface engineering of perovskite that can facilitate the further development and application of perovskite optoelectronics.
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Affiliation(s)
- Jingjing He
- Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Engineering Research Center of Hierarchical Nanomaterials, School of Materials Science and Engineering, East China University of Science and Technology, 130 Meilong Road, 200237, Shanghai, China
| | - Junxian Liu
- Centre for Clean Environment and Energy, School of Environment and Science, Gold Coast Campus, Griffith University, Brisbane, QLD, 4222, Australia
| | - Yu Hou
- Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Engineering Research Center of Hierarchical Nanomaterials, School of Materials Science and Engineering, East China University of Science and Technology, 130 Meilong Road, 200237, Shanghai, China.
| | - Yun Wang
- Centre for Clean Environment and Energy, School of Environment and Science, Gold Coast Campus, Griffith University, Brisbane, QLD, 4222, Australia.
| | - Shuang Yang
- Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Engineering Research Center of Hierarchical Nanomaterials, School of Materials Science and Engineering, East China University of Science and Technology, 130 Meilong Road, 200237, Shanghai, China.
| | - Hua Gui Yang
- Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Engineering Research Center of Hierarchical Nanomaterials, School of Materials Science and Engineering, East China University of Science and Technology, 130 Meilong Road, 200237, Shanghai, China
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Xing J, Zhao C, Zou Y, Kong W, Yu Z, Shan Y, Dong Q, Zhou D, Yu W, Guo C. Modulating the optical and electrical properties of MAPbBr 3 single crystals via voltage regulation engineering and application in memristors. LIGHT, SCIENCE & APPLICATIONS 2020; 9:111. [PMID: 32637078 PMCID: PMC7327067 DOI: 10.1038/s41377-020-00349-w] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 06/09/2020] [Accepted: 06/15/2020] [Indexed: 05/31/2023]
Abstract
Defect density is one of the most significant characteristics of perovskite single crystals (PSCs) that determines their optical and electrical properties, but few strategies are available to tune this property. Here, we demonstrate that voltage regulation is an efficient method to tune defect density, as well as the optical and electrical properties of PSCs. A three-step carrier transport model of MAPbBr3 PSCs is proposed to explore the defect regulation mechanism and carrier transport dynamics via an applied bias. Dynamic and steady-state photoluminescence measurements subsequently show that the surface defect density, average carrier lifetime, and photoluminescence intensity can be efficiently tuned by the applied bias. In particular, when the regulation voltage is 20 V (electrical poling intensity is 0.167 V μm-1), the surface defect density of MAPbBr3 PSCs is reduced by 24.27%, the carrier lifetime is prolonged by 32.04%, and the PL intensity is increased by 112.96%. Furthermore, a voltage-regulated MAPbBr3 PSC memristor device shows an adjustable multiresistance, weak ion migration effect and greatly enhanced device stability. Voltage regulation is a promising engineering technique for developing advanced perovskite optoelectronic devices.
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Affiliation(s)
- Jun Xing
- The Guo Photonics Laboratory, State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, 130033 Changchun, China
- University of Chinese Academy of Sciences, 100049 Beijing, China
| | - Chen Zhao
- The Guo Photonics Laboratory, State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, 130033 Changchun, China
- University of Chinese Academy of Sciences, 100049 Beijing, China
| | - Yuting Zou
- The Guo Photonics Laboratory, State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, 130033 Changchun, China
- University of Chinese Academy of Sciences, 100049 Beijing, China
| | - Wenchi Kong
- The Guo Photonics Laboratory, State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, 130033 Changchun, China
- University of Chinese Academy of Sciences, 100049 Beijing, China
| | - Zhi Yu
- The Guo Photonics Laboratory, State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, 130033 Changchun, China
- University of Chinese Academy of Sciences, 100049 Beijing, China
| | - Yuwei Shan
- The Guo Photonics Laboratory, State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, 130033 Changchun, China
- University of Chinese Academy of Sciences, 100049 Beijing, China
| | - Qingfeng Dong
- State Key Laboratory of Supramolecular Structure and Materials, Jilin University, 130012 Changchun, China
| | - Ding Zhou
- State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, 130033 Changchun, China
| | - Weili Yu
- The Guo Photonics Laboratory, State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, 130033 Changchun, China
- University of Chinese Academy of Sciences, 100049 Beijing, China
| | - Chunlei Guo
- The Guo Photonics Laboratory, State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, 130033 Changchun, China
- The Institute of Optics, University of Rochester, Rochester, NY 14627 USA
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Haque MA, Kee S, Villalva DR, Ong W, Baran D. Halide Perovskites: Thermal Transport and Prospects for Thermoelectricity. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2020; 7:1903389. [PMID: 32440477 PMCID: PMC7237854 DOI: 10.1002/advs.201903389] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 03/08/2020] [Accepted: 03/10/2020] [Indexed: 05/24/2023]
Abstract
The recent re-emergence of halide perovskites has received escalating interest for optoelectronic applications. In addition to photovoltaics, the multifunctional nature of halide perovskites has led to diverse applications. The ultralow thermal conductivity coupled with decent mobility and charge carrier tunability led to the prediction of halide perovskites as a possible contender for future thermoelectrics. Herein, recent advances in thermal transport of halide perovskites and their potentials and challenges for thermoelectrics are reviewed. An overview of the phonon behavior in halide perovskites, as well as the compositional dependency is analyzed. Understanding thermal transport and knowing the thermal conductivity value is crucial for creating effective heat dissipation schemes and determining other thermal-related properties like thermo-optic coefficients, hot-carrier cooling, and thermoelectric efficiency. Recent works on halide perovskite-based thermoelectrics together with theoretical predictions for their future viability are highlighted. Also, progress on modulating halide perovskite-based thermoelectric properties using light and chemical doping is discussed. Finally, strategies to overcome the limiting factors in halide perovskite thermoelectrics and their prospects are emphasized.
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Affiliation(s)
- Md Azimul Haque
- KAUST Solar CenterPhysical Science and Engineering DivisionKing Abdullah University of Science and TechnologyThuwal23955‐6900Saudi Arabia
| | - Seyoung Kee
- KAUST Solar CenterPhysical Science and Engineering DivisionKing Abdullah University of Science and TechnologyThuwal23955‐6900Saudi Arabia
| | - Diego Rosas Villalva
- KAUST Solar CenterPhysical Science and Engineering DivisionKing Abdullah University of Science and TechnologyThuwal23955‐6900Saudi Arabia
| | - Wee‐Liat Ong
- ZJU‐UIUC InstituteCollege of Energy EngineeringZhejiang UniversityHangzhouZhejiang310027China
- State Key Laboratory of Clean Energy UtilizationZhejiang UniversityHangzhouZhejiang310027China
| | - Derya Baran
- KAUST Solar CenterPhysical Science and Engineering DivisionKing Abdullah University of Science and TechnologyThuwal23955‐6900Saudi Arabia
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29
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Harikesh PC, Surendran A, Ghosh B, John RA, Moorthy A, Yantara N, Salim T, Thirumal K, Leong WL, Mhaisalkar S, Mathews N. Cubic NaSbS 2 as an Ionic-Electronic Coupled Semiconductor for Switchable Photovoltaic and Neuromorphic Device Applications. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e1906976. [PMID: 31912946 DOI: 10.1002/adma.201906976] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Revised: 11/29/2019] [Indexed: 06/10/2023]
Abstract
The recent emergence of lead halide perovskites as ionic-electronic coupled semiconductors motivates the investigation of alternative solution-processable materials with similar modulatable ionic and electronic transport properties. Here, a novel semiconductor-cubic NaSbS2 -for ionic-electronic coupled transport is investigated through a combined theoretical and experimental approach. The material exhibits mixed ionic-electronic conductivity in inert atmosphere and superionic conductivity in humid air. It is shown that post deposition electronic reconfigurability in this material enabled by an electric field induces ionic segregation enabling a switchable photovoltaic effect. Utilizing post-perturbation of the ionic composition of the material via electrical biasing and persistent photoconductivity, multistate memristive synapses with higher-order weight modulations are realized for neuromorphic computing, opening up novel applications with such ionic-electronic coupled materials.
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Affiliation(s)
- P C Harikesh
- Energy Research Institute @NTU (ERI@N), Research Techno Plaza, X-Frontier Block, Level 5, 50 Nanyang Drive, Singapore, 637553, Singapore
- Interdisciplinary Graduate School, Energy Research Institute at NTU, Singapore, 639798, Singapore
| | - Abhijith Surendran
- School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Biplab Ghosh
- Energy Research Institute @NTU (ERI@N), Research Techno Plaza, X-Frontier Block, Level 5, 50 Nanyang Drive, Singapore, 637553, Singapore
| | - Rohit Abraham John
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Arjun Moorthy
- Energy Research Institute @NTU (ERI@N), Research Techno Plaza, X-Frontier Block, Level 5, 50 Nanyang Drive, Singapore, 637553, Singapore
| | - Natalia Yantara
- Energy Research Institute @NTU (ERI@N), Research Techno Plaza, X-Frontier Block, Level 5, 50 Nanyang Drive, Singapore, 637553, Singapore
| | - Teddy Salim
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Krishnamoorthy Thirumal
- Energy Research Institute @NTU (ERI@N), Research Techno Plaza, X-Frontier Block, Level 5, 50 Nanyang Drive, Singapore, 637553, Singapore
| | - Wei Lin Leong
- Energy Research Institute @NTU (ERI@N), Research Techno Plaza, X-Frontier Block, Level 5, 50 Nanyang Drive, Singapore, 637553, Singapore
- School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Subodh Mhaisalkar
- Energy Research Institute @NTU (ERI@N), Research Techno Plaza, X-Frontier Block, Level 5, 50 Nanyang Drive, Singapore, 637553, Singapore
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Nripan Mathews
- Energy Research Institute @NTU (ERI@N), Research Techno Plaza, X-Frontier Block, Level 5, 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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Liu YQ, Wei D, Cui HL, Wang DQ. Photovoltaic Effect Related to Methylammonium Cation Orientation and Carrier Transport Properties in High-Performance Perovskite Solar Cells. ACS APPLIED MATERIALS & INTERFACES 2020; 12:3563-3571. [PMID: 31878776 DOI: 10.1021/acsami.9b18452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Solar cells based on organic-inorganic hybrid halide perovskites (OIHHPs) have been widely studied because of their increasing power conversion efficiency. Extensive research has been conducted in electrical and optical properties and device fabrication. However, in terms of material science, the photovoltaic effects of OIHHP are still not well understood. Here, we theoretically investigate the photovoltaic phenomena of MAPbI3 (MA = CH3NH3+) under standard AM 1.5G sunlight illumination, considering the MA cation orientation, light incident angle, polarization, and photon energy, using Keldysh nonequilibrium Green's function formalism combined with density functional theory calculations. It is found that the short-circuit current density Jsc has a maximum value of 383.149 A/m2 when the MA orientation is parallel to the transport direction, whereas it is negligible when the MA orientation is orthogonal to the transport direction. In addition, full consideration is also given to the direction of incidence of sunlight and its polarization state. Nevertheless, of all factors considered, MA orientation plays the decisive role, for Jsc still has a respectable value of 364.112 A/m2 even for a 90° sunlight incident angle relative to the transport direction, so long as the MAs are aligned in the transport direction. The increase in the photocurrent is attributed to an increase in the transmission coefficient of low-energy holes, as well as improvement of the velocities and mobilities of electrons and holes in the MAPbI3-based device with [001] MA orientation. The results suggest that during the designing of high-performance OIHHP-based solar cells and photoelectronic devices, the crystal orientation and MA cation orientation relative to the transport direction should be carefully considered as they directly affect carrier transport properties.
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Affiliation(s)
- Ya-Qing Liu
- College of Instrumentation & Electrical Engineering , Jilin University , Changchun , Jilin 130061 , China
- Chongqing Key Laboratory of Multi-Scale Manufacturing Technology, Chongqing Institute of Green and Intelligent Technology , Chinese Academy of Sciences , Chongqing 400714 , China
| | - Dongshan Wei
- School of Electronic Engineering , Dongguan University of Technology , Dongguan , Guangdong 523808 , China
| | - Hong-Liang Cui
- College of Instrumentation & Electrical Engineering , Jilin University , Changchun , Jilin 130061 , China
- Chongqing Key Laboratory of Multi-Scale Manufacturing Technology, Chongqing Institute of Green and Intelligent Technology , Chinese Academy of Sciences , Chongqing 400714 , China
| | - De-Qiang Wang
- Chongqing Key Laboratory of Multi-Scale Manufacturing Technology, Chongqing Institute of Green and Intelligent Technology , Chinese Academy of Sciences , Chongqing 400714 , China
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31
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Yamilova OR, Danilov AV, Mangrulkar M, Fedotov YS, Luchkin SY, Babenko SD, Bredikhin SI, Aldoshin SM, Stevenson KJ, Troshin PA. Reduction of Methylammonium Cations as a Major Electrochemical Degradation Pathway in MAPbI 3 Perovskite Solar Cells. J Phys Chem Lett 2020; 11:221-228. [PMID: 31814411 DOI: 10.1021/acs.jpclett.9b03161] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Herein, we reveal for the first time a comprehensive mechanism of poorly investigated electrochemical decomposition of CH3NH3PbI3 using a set of microscopy techniques (optical, AFM, PL) and ToF-SIMS. We demonstrate that applied electric bias induces the oxidation of I- to I2, which remains trapped in the film in the form of polyiodides, and hence, the process can be conceivably reversed by reduction. On the contrary, reduction of organic methylammonium cation produces volatile products, which leave the film and thus make the degradation irreversible. Our results lead to a paradigm change when considering design principles for improving the stability of complex lead halide materials as those featuring organic cations rather than halide anions as the most electric field-sensitive components. Suppressing the electrochemical degradation of complex lead halides represents a crucial challenge, which should be addressed in order to bring the operational stability of perovskite photovoltaics to commercially interesting benchmarks.
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Affiliation(s)
- Olga R Yamilova
- Center for Energy Science and Technology (CEST) , Skolkovo Institute of Science and Technology , Nobel Street 3 , 143026 Moscow , Russia
- Laboratory of Functional Materials for Electronics and Medicine (FMEM) , Institute for Problems of Chemical Physics of Russian Academy of Sciences (IPCP RAS) , Semenov Avenue 1 , 142432 Chernogolovka, Moscow region, Russia
| | - Andrei V Danilov
- Laboratory of Spectroscopy of Defect Structures , Institute of Solid State Physics of Russian Academy of Sciences (ISSP RAS) , Academika Osipyana Street 2 , 142432 Chernogolovka, Moscow region, Russia
| | - Mayuribala Mangrulkar
- Center for Energy Science and Technology (CEST) , Skolkovo Institute of Science and Technology , Nobel Street 3 , 143026 Moscow , Russia
| | - Yuri S Fedotov
- Laboratory of Spectroscopy of Defect Structures , Institute of Solid State Physics of Russian Academy of Sciences (ISSP RAS) , Academika Osipyana Street 2 , 142432 Chernogolovka, Moscow region, Russia
| | - Sergey Yu Luchkin
- Center for Energy Science and Technology (CEST) , Skolkovo Institute of Science and Technology , Nobel Street 3 , 143026 Moscow , Russia
| | - Sergey D Babenko
- Chernogolovka Branch of the N.N. Semenov Federal Research Center for Chemical Physics , Russian Academy of Sciences (FRCCP RAS Chernogolovka) , Semenov Avenue 1 , 142432 Chernogolovka, Moscow region, Russia
| | - Sergey I Bredikhin
- Laboratory of Spectroscopy of Defect Structures , Institute of Solid State Physics of Russian Academy of Sciences (ISSP RAS) , Academika Osipyana Street 2 , 142432 Chernogolovka, Moscow region, Russia
| | - Sergey M Aldoshin
- Laboratory of Functional Materials for Electronics and Medicine (FMEM) , Institute for Problems of Chemical Physics of Russian Academy of Sciences (IPCP RAS) , Semenov Avenue 1 , 142432 Chernogolovka, Moscow region, Russia
| | - Keith J Stevenson
- Center for Energy Science and Technology (CEST) , Skolkovo Institute of Science and Technology , Nobel Street 3 , 143026 Moscow , Russia
| | - Pavel A Troshin
- Center for Energy Science and Technology (CEST) , Skolkovo Institute of Science and Technology , Nobel Street 3 , 143026 Moscow , Russia
- Laboratory of Functional Materials for Electronics and Medicine (FMEM) , Institute for Problems of Chemical Physics of Russian Academy of Sciences (IPCP RAS) , Semenov Avenue 1 , 142432 Chernogolovka, Moscow region, Russia
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32
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Jung HJ, Stompus CC, Kanatzidis MG, Dravid VP. Self-Passivation of 2D Ruddlesden-Popper Perovskite by Polytypic Surface PbI 2 Encapsulation. NANO LETTERS 2019; 19:6109-6117. [PMID: 31424953 DOI: 10.1021/acs.nanolett.9b02069] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Two-dimensional Ruddlesden-Popper (2D RP) halide perovskites, C2MAn-1PbnI3n+1 (C = bulky ammonium cation; MA = methylammonium) with low n-members (n < 5), have been garnering sensational attention for photovoltaic and optoelectronic applications because of the long carrier diffusion lengths, long-term stability, and tunable bandgap. Yet, the surface modification of 2D RP under kinetic particle irradiation, such as light or electron irradiation, is ambiguous, even though it is imperative to elucidate long-stabilized conversion efficiency. Herein, we present molecular-scale observations of dynamic surface reconstruction of BA2MA2Pb3I10 (n = 3) 2D RP induced by the electron beam. The surface dynamics reveal lateral growth of polytypic PbI2 with 3R, 4H, and 2H structures at the edge and surface of the 2D perovskite, accompanied by simultaneous annihilation at the other edges. Local radiolysis occurs dominantly by the internal energy increase of electron momentum transfer, which triggers a sequential layer-by-layer degradation into PbI2. In situ observation of the polytypic PbI2 growth at the whole surface and edges of 2D RP under electron irradiation elucidates how the outer PbI2 self-passivation can protect inner 2D RP, causing longer operando stability.
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Affiliation(s)
- Hee Joon Jung
- Department of Materials Science and Engineering , Northwestern University , Evanston , Illinois 60208 , United States
| | - Constantinos C Stompus
- Department of Chemistry , Northwestern University , Evanston , Illinois 60208 , United States
- Materials Science Division , Argonne National Laboratory , Argonne , Illinois 60439 , United States
| | - Mercouri G Kanatzidis
- Department of Chemistry , Northwestern University , Evanston , Illinois 60208 , United States
- Materials Science Division , Argonne National Laboratory , Argonne , Illinois 60439 , United States
| | - Vinayak P Dravid
- Department of Materials Science and Engineering , Northwestern University , Evanston , Illinois 60208 , United States
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Influence of Electrical Traps on the Current Density Degradation of Inverted Perovskite Solar Cells. MATERIALS 2019; 12:ma12101644. [PMID: 31137552 PMCID: PMC6567867 DOI: 10.3390/ma12101644] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Revised: 05/15/2019] [Accepted: 05/15/2019] [Indexed: 11/17/2022]
Abstract
Premature aging of perovskite solar cells (PSC) is one of the biggest challenges for its commercialization. Particularly, PSCs exhibit rapid degradation of photovoltaic parameters under ambient air exposure. To estimate the degradation mechanism of PSC under air exposure, we systematically analyzed the relationship between electrical traps of the PSC and its degradation. After 240 h of air exposure to the PSC, its power conversion efficiency degraded to 80% compared to its initial value. The loss mainly originated from reduced current density, which is affected by traps and carrier transport in the disordered semiconducting layer. Capacitance–voltage plots of the PSC showed that the ionic doping from the perovskite layer caused an increased number of trap sites at the buffer layer. Moreover, the extrapolation of temperature dependent open circuit voltage graphs indicated that the trap sites lead to poor carrier transport by increasing recombination losses in the aged device. Therefore, trap sites arose from the result of ion migration and caused an early degradation of PSC under air exposure.
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34
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Wu WQ, Yang Z, Rudd PN, Shao Y, Dai X, Wei H, Zhao J, Fang Y, Wang Q, Liu Y, Deng Y, Xiao X, Feng Y, Huang J. Bilateral alkylamine for suppressing charge recombination and improving stability in blade-coated perovskite solar cells. SCIENCE ADVANCES 2019; 5:eaav8925. [PMID: 30873433 PMCID: PMC6408151 DOI: 10.1126/sciadv.aav8925] [Citation(s) in RCA: 133] [Impact Index Per Article: 26.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Accepted: 01/28/2019] [Indexed: 05/19/2023]
Abstract
The power conversion efficiencies (PCEs) of perovskite solar cells (PSCs) are already higher than that of other thin film technologies, but laboratory cell-fabrication methods are not scalable. Here, we report an additive strategy to enhance the efficiency and stability of PSCs made by scalable blading. Blade-coated PSCs incorporating bilateral alkylamine (BAA) additives achieve PCEs of 21.5 (aperture, 0.08 cm2) and 20.0% (aperture, 1.1 cm2), with a record-small open-circuit voltage deficit of 0.35 V under AM1.5G illumination. The stabilized PCE reaches 22.6% under 0.3 sun. Anchoring monolayer bilateral amino groups passivates the defects at the perovskite surface and enhances perovskite stability by exposing the linking hydrophobic alkyl chain. Grain boundaries are reinforced by BAA and are more resistant to mechanical bending and electron beam damage. BAA improves the device shelf lifetime to >1000 hours and operation stability to >500 hours under light, with 90% of the initial efficiency retained.
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35
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Wang ZX, Zhang Y, Tang YY, Li PF, Xiong RG. Fluoridation Achieved Antiperovskite Molecular Ferroelectric in [(CH3)2(F-CH2CH2)NH]3(CdCl3)(CdCl4). J Am Chem Soc 2019; 141:4372-4378. [DOI: 10.1021/jacs.8b13109] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zhong-Xia Wang
- Ordered Matter Science Research Center, Nanchang University, Nanchang 330031, People’s Republic of China
- Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics, Southeast University, Nanjing 211189, People’s Republic of China
| | - Yi Zhang
- Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics, Southeast University, Nanjing 211189, People’s Republic of China
| | - Yuan-Yuan Tang
- Ordered Matter Science Research Center, Nanchang University, Nanchang 330031, People’s Republic of China
| | - Peng-Fei Li
- Ordered Matter Science Research Center, Nanchang University, Nanchang 330031, People’s Republic of China
| | - Ren-Gen Xiong
- Ordered Matter Science Research Center, Nanchang University, Nanchang 330031, People’s Republic of China
- Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics, Southeast University, Nanjing 211189, People’s Republic of China
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36
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Hwang T, Yun AJ, Kim J, Cho D, Kim S, Hong S, Park B. Electronic Traps and Their Correlations to Perovskite Solar Cell Performance via Compositional and Thermal Annealing Controls. ACS APPLIED MATERIALS & INTERFACES 2019; 11:6907-6917. [PMID: 30668095 DOI: 10.1021/acsami.8b17431] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Herein, underlying factors for enabling efficient and stable performance of perovskite solar cells are studied through nanostructural controls of organic-inorganic halide perovskites. Namely, MAPbI3, (FA0.83MA0.17)Pb(I0.83Br0.17)3, and (Cs0.10FA0.75MA0.15)Pb(I0.85Br0.15)3 perovskites (abbreviated as MA, FAMA, and CsFAMA, respectively) are examined with a grain growth control through thermal annealing. FAMA- and CsFAMA-based cells result in stable photovoltaic performance, while MA cells are sensitively dependent on the perovskite grain size dominated by annealing time. Micro-/nanoscopic features are comprehensively analyzed to unravel the origin that is directly correlated to the cell performance with the applications of electronic-trap characterizations such as photoconductive noise microscopy and capacitance analyses. It is revealed that CsFAMA has a lower trap density compared to MA and FAMA through the analyses of 1/ f noises and trapping/detrapping capacitances. Also, an open-circuit voltage ( Voc) change is correlated to the variation of trap states during the shelf-life test: FAMA and CsFAMA cells with the negligible change of Voc over weeks exhibit trap states shifting toward the band edge, although the power-conversion efficiencies are clearly reduced. The origins that critically affect the solar cell performance through the characterizations of shallow/deep traps with additional mobile defects in the perovskite and interfaces are discussed.
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37
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Liu Z, Lin K, Ren Y, Kato K, Cao Y, Deng J, Chen J, Xing X. Inorganic–organic hybridization induced uniaxial zero thermal expansion in MC4O4 (M = Ba, Pb). Chem Commun (Camb) 2019; 55:4107-4110. [DOI: 10.1039/c9cc00226j] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report two inorganic–organic hybrid materials with pillar-layered architectures, BaC4O4 and PbC4O4, which show uniaxial zero thermal expansion (ZTE) along the hybrid direction over a wide temperature range.
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Affiliation(s)
- Zhanning Liu
- Beijing Advanced Innovation Center for Materials Genome Engineering
- Department of Physical Chemistry
- University of Science and Technology Beijing
- Beijing
- China
| | - Kun Lin
- Beijing Advanced Innovation Center for Materials Genome Engineering
- Department of Physical Chemistry
- University of Science and Technology Beijing
- Beijing
- China
| | - Yang Ren
- X-Ray Science Division
- Argonne National Laboratory
- Argonne
- USA
| | | | - Yili Cao
- Beijing Advanced Innovation Center for Materials Genome Engineering
- Department of Physical Chemistry
- University of Science and Technology Beijing
- Beijing
- China
| | - Jinxia Deng
- Beijing Advanced Innovation Center for Materials Genome Engineering
- Department of Physical Chemistry
- University of Science and Technology Beijing
- Beijing
- China
| | - Jun Chen
- Beijing Advanced Innovation Center for Materials Genome Engineering
- Department of Physical Chemistry
- University of Science and Technology Beijing
- Beijing
- China
| | - Xianran Xing
- Beijing Advanced Innovation Center for Materials Genome Engineering
- Department of Physical Chemistry
- University of Science and Technology Beijing
- Beijing
- China
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38
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Kou B, Zhang W, Ji C, Wu Z, Zhang S, Liu X, Luo J. Tunable optical absorption in lead-free perovskite-like hybrids by iodide management. Chem Commun (Camb) 2019; 55:14174-14177. [DOI: 10.1039/c9cc05365d] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Tunable optical absorption in lead-free perovskite-like hybrids by iodide management.
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Affiliation(s)
- Bo Kou
- College of Chemistry and Bioengineering (Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials)
- Guilin University of Technology
- Guilin
- P. R. China
- State Key Laboratory of Structural Chemistry
| | - Weichuan Zhang
- State Key Laboratory of Structural Chemistry
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou 350002
- China
| | - Chengmin Ji
- State Key Laboratory of Structural Chemistry
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou 350002
- China
| | - Zhenyue Wu
- State Key Laboratory of Structural Chemistry
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou 350002
- China
| | - Shuhua Zhang
- College of Chemistry and Bioengineering (Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials)
- Guilin University of Technology
- Guilin
- P. R. China
| | - Xitao Liu
- State Key Laboratory of Structural Chemistry
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou 350002
- China
| | - Junhua Luo
- State Key Laboratory of Structural Chemistry
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou 350002
- China
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39
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Chen B, Rudd PN, Yang S, Yuan Y, Huang J. Imperfections and their passivation in halide perovskite solar cells. Chem Soc Rev 2019; 48:3842-3867. [DOI: 10.1039/c8cs00853a] [Citation(s) in RCA: 834] [Impact Index Per Article: 166.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Perovskite solar cells to date are made of polycrystalline films which contain a high density of defects. Imperfection passivation to reduce non-radiative recombination and suppress ion migration could improve device efficiency and device stability.
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Affiliation(s)
- Bo Chen
- Department of Applied Physical Sciences
- The University of North Carolina at Chapel Hill
- Chapel Hill
- USA
| | - Peter N. Rudd
- Department of Applied Physical Sciences
- The University of North Carolina at Chapel Hill
- Chapel Hill
- USA
| | - Shuang Yang
- Department of Applied Physical Sciences
- The University of North Carolina at Chapel Hill
- Chapel Hill
- USA
- Department of Mechanical and Materials Engineering
| | - Yongbo Yuan
- School of Physics & Electronics
- Hunan Key Laboratory of Super Microstructure & Ultrafast Process
- Central South University
- Changsha
- China
| | - Jinsong Huang
- Department of Applied Physical Sciences
- The University of North Carolina at Chapel Hill
- Chapel Hill
- USA
- Department of Mechanical and Materials Engineering
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40
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Abstract
The fields of photovoltaics, photodetection and light emission have seen tremendous activity in recent years with the advent of hybrid organic-inorganic perovskites. Yet, there have been far fewer reports of perovskite-based field-effect transistors. The lateral and interfacial transport requirements of transistors make them particularly vulnerable to surface contamination and defects rife in polycrystalline films and bulk single crystals. Here, we demonstrate a spatially-confined inverse temperature crystallization strategy which synthesizes micrometre-thin single crystals of methylammonium lead halide perovskites MAPbX3 (X = Cl, Br, I) with sub-nanometer surface roughness and very low surface contamination. These benefit the integration of MAPbX3 crystals into ambipolar transistors and yield record, room-temperature field-effect mobility up to 4.7 and 1.5 cm2 V−1 s−1 in p and n channel devices respectively, with 104 to 105 on-off ratio and low turn-on voltages. This work paves the way for integrating hybrid perovskite crystals into printed, flexible and transparent electronics. The methylammonium lead halide perovskites have shown excellent optoelectronic properties but the field-effect transistors are much less studied. Here Yu et al. synthesize micrometer-thin crystals of perovskites with low surface contamination and make ambipolar transistor devices with high mobilities.
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41
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Collins L, Ahmadi M, Qin J, Liu Y, Ovchinnikova OS, Hu B, Jesse S, Kalinin SV. Time resolved surface photovoltage measurements using a big data capture approach to KPFM. NANOTECHNOLOGY 2018; 29:445703. [PMID: 30084391 DOI: 10.1088/1361-6528/aad873] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Optoelectronic behavior in materials such as organic/inorganic hybrid perovskites depend on a complex interplay between fast (electronic) and slower (ionic) processes. These processes are thought to be influenced by structural inhomogeneities (e.g. interfaces and grain boundaries) bringing forward the necessity for development of techniques capable of correlating nanostructure and photo-transport behavior. While Kelvin probe force microscopy (KPFM) is ideally suited to map surface potentials on relevant length scales, it lacks sufficient temporal resolution to extract the meaningful system dynamics. Here, we develop a time resolved surface photovoltage (SPV) measurement based on full information capture of the photodetector stream during open loop KPFM operation. G-Mode, or G-KPFM allows quantification of SPV with microsecond temporal and nanoscale spatial resolution. Using this technique, we observe concurrent spatial and fast temporal variations in the SPV generated across a methylammonium lead bromide (MAPbBr3) thin film, a possible indicator relating microstructure with heterogenous photo-transport behavior. We further demonstrate the advantage of adopting big data analytics including unsupervised clustering methods to quickly discern spatial variability in the information rich SPV dataset. Beyond G-KPFM, such clustering methods will be useful for interpretation of the multidimensional datasets arising from the growing number of time resolved KPFM approaches now available.
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Affiliation(s)
- Liam Collins
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN 37831, United States of America. Institute for Functional Imaging of Materials, Oak Ridge National Laboratory, Oak Ridge, TN 37831, United States of America
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42
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Zhou J, Fang HH, Wang H, Meng R, Zhou H, Loi MA, Zhang Y. Understanding the Passivation Mechanisms and Opto-Electronic Spectral Response in Methylammonium Lead Halide Perovskite Single Crystals. ACS APPLIED MATERIALS & INTERFACES 2018; 10:35580-35588. [PMID: 30246528 DOI: 10.1021/acsami.8b10782] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Attaining control over the surface traps in halide perovskites is critical for the tunability of ultimate device characteristics. Here, we present a study on the modulation of photophysical properties, surface traps, and recombination in MAPbI3 single crystals (MSCs) with methylamine (MA) vapor surface treatment. Transient photoluminescence spectroscopy in conjunction with density functional theory calculations reveals that nonradiative recombination related to Pb2+ becomes mitigated after MA vaporing while radiative recombination via bimolecular path tends to increase, which originates from the passivation of Pb ions with the Lewis base nitrogen in MA. In contrast to the broad photoresponse in the pristine MSC photodiodes, application of MA surface treatments leads to a spectral narrowing effect (SNE) in MSCs with the response peak width <40 nm. On the basis of the examined photon-cycling effect with MA treatment that indicates a reduction of exciton diffusion into the interior region of MSCs, we attempt to propose an operation mechanism for the SNE which can be related to the overall stronger surface recombination and resulting severe photocarrier losses, such that the charge collection and quantum efficiency from the above-band gap absorption decrease. This work provides a facile approach with chemical means to tune the surface properties and eventual spectral selectivity in MSCs that are promising for photon-detection device applications.
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Affiliation(s)
- Jiyu Zhou
- School of Chemistry, Beijing Advanced Innovation Center for Biomedical Engineering , Beihang University , Beijing 100191 , P. R. China
| | - Hong-Hua Fang
- Zernike Institute for Advanced Materials , University of Groningen , Groningen 9747 AG , The Netherlands
| | - Hui Wang
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in Nanoscience , National Center for Nanoscience and Technology , Beijing 100190 , P. R. China
| | - Rui Meng
- School of Chemistry, Beijing Advanced Innovation Center for Biomedical Engineering , Beihang University , Beijing 100191 , P. R. China
| | - Huiqiong Zhou
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in Nanoscience , National Center for Nanoscience and Technology , Beijing 100190 , P. R. China
| | - Maria A Loi
- Zernike Institute for Advanced Materials , University of Groningen , Groningen 9747 AG , The Netherlands
| | - Yuan Zhang
- School of Chemistry, Beijing Advanced Innovation Center for Biomedical Engineering , Beihang University , Beijing 100191 , P. R. China
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43
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Harikesh PC, Wu B, Ghosh B, John RA, Lie S, Thirumal K, Wong LH, Sum TC, Mhaisalkar S, Mathews N. Doping and Switchable Photovoltaic Effect in Lead-Free Perovskites Enabled by Metal Cation Transmutation. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1802080. [PMID: 29978516 DOI: 10.1002/adma.201802080] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2018] [Revised: 05/20/2018] [Indexed: 06/08/2023]
Abstract
Creating defect tolerant lead-free halide perovskites is the major challenge for development of high-performance photovoltaics with nontoxic absorbers. Few compounds of Sn, Sb, or Bi possess ns2 electronic configuration similar to lead, but their poor photovoltaic performances inspire us to evaluate other factors influencing defect tolerance properties. The effect of heavy metal cation (Bi) transmutation and ionic migration on the defects and carrier properties in a 2D layered perovskite (NH4 )3 (Sb(1-x) Bix )2 I9 system is investigated. It is shown, for the first time, the possibility of engineering the carriers in halide perovskites via metal cation transmutation to successfully form intrinsic p- and n-type materials. It is also shown that this material possesses a direct-indirect bandgap enabling high absorption coefficient, extended carrier lifetimes >100 ns, and low trap densities similar to lead halide perovskites. This study also demonstrates the possibility of electrical poling to induce switchable photovoltaic effect without additional electron and hole transport layers.
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Affiliation(s)
- Padinhare Cholakkal Harikesh
- Energy Research Institute @NTU (ERI@N), Research Techno Plaza, X-Frontier Block, Level 5, 50 Nanyang Drive, Singapore, 637553, Singapore
- Interdisciplinary Graduate School, Nanyang Technological University, Singapore, 639798, Singapore
| | - Bo Wu
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University (NTU), 21 Nanyang Link, Singapore, 637371, Singapore
| | - Biplab Ghosh
- Energy Research Institute @NTU (ERI@N), Research Techno Plaza, X-Frontier Block, Level 5, 50 Nanyang Drive, Singapore, 637553, Singapore
- Interdisciplinary Graduate School, Nanyang Technological University, Singapore, 639798, Singapore
| | - Rohit Abraham John
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Stener Lie
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Krishnamoorthy Thirumal
- Energy Research Institute @NTU (ERI@N), Research Techno Plaza, X-Frontier Block, Level 5, 50 Nanyang Drive, Singapore, 637553, Singapore
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore
| | - Lydia Helena Wong
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Tze Chien Sum
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University (NTU), 21 Nanyang Link, Singapore, 637371, Singapore
| | - Subodh Mhaisalkar
- Energy Research Institute @NTU (ERI@N), Research Techno Plaza, X-Frontier Block, Level 5, 50 Nanyang Drive, Singapore, 637553, Singapore
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Nripan Mathews
- Energy Research Institute @NTU (ERI@N), Research Techno Plaza, X-Frontier Block, Level 5, 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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44
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Varadwaj A, Varadwaj PR, Yamashita K. Revealing the Cooperative Chemistry of the Organic Cation in the Methylammonium Lead Triiodide Perovskite Semiconductor System. ChemistrySelect 2018. [DOI: 10.1002/slct.201703089] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Arpita Varadwaj
- Department of Chemical System Engineering; School of Engineering; The University of Tokyo 7-3-1, Hongo; Bunkyo-ku Japan 113-8656
- CREST-JST, 7 Gobancho, Chiyoda-ku; Tokyo Japan 102-0076
| | - Pradeep R. Varadwaj
- Department of Chemical System Engineering; School of Engineering; The University of Tokyo 7-3-1, Hongo; Bunkyo-ku Japan 113-8656
- CREST-JST, 7 Gobancho, Chiyoda-ku; Tokyo Japan 102-0076
| | - Koichi Yamashita
- Department of Chemical System Engineering; School of Engineering; The University of Tokyo 7-3-1, Hongo; Bunkyo-ku Japan 113-8656
- CREST-JST, 7 Gobancho, Chiyoda-ku; Tokyo Japan 102-0076
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45
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Howard JM, Tennyson EM, Barik S, Szostak R, Waks E, Toney MF, Nogueira AF, Neves BRA, Leite MS. Humidity-Induced Photoluminescence Hysteresis in Variable Cs/Br Ratio Hybrid Perovskites. J Phys Chem Lett 2018; 9:3463-3469. [PMID: 29882399 DOI: 10.1021/acs.jpclett.8b01357] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Hybrid organic-inorganic perovskites containing Cs are a promising new material for light-absorbing and light-emitting optoelectronics. However, the impact of environmental conditions on their optical properties is not fully understood. Here, we elucidate and quantify the influence of distinct humidity levels on the charge carrier recombination in Cs xFA1- xPb(I yBr1- y)3 perovskites. Using in situ environmental photoluminescence (PL), we temporally and spectrally resolve light emission within a loop of critical relative humidity (rH) levels. Our measurements show that exposure up to 35% rH increases the PL emission for all Cs (10-17%) and Br (17-38%) concentrations investigated here. Spectrally, samples with larger Br concentrations exhibit PL redshift at higher humidity levels, revealing water-driven halide segregation. The compositions considered present hysteresis in their PL intensity upon returning to a low-moisture environment due to partially reversible hydration of the perovskites. Our findings demonstrate that the Cs/Br ratio strongly influences both the spectral stability and extent of light emission hysteresis. We expect our method to become standard when testing the stability of emerging perovskites, including lead-free options, and to be combined with other parameters known for affecting material degradation, e.g., oxygen and temperature.
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Affiliation(s)
- John M Howard
- Department of Materials Science and Engineering , University of Maryland , College Park , Maryland 20740 , United States
- Institute for Research in Electronics and Applied Physics , University of Maryland , College Park , Maryland 20740 , United States
| | - Elizabeth M Tennyson
- Department of Materials Science and Engineering , University of Maryland , College Park , Maryland 20740 , United States
- Institute for Research in Electronics and Applied Physics , University of Maryland , College Park , Maryland 20740 , United States
| | - Sabyasachi Barik
- Institute for Research in Electronics and Applied Physics , University of Maryland , College Park , Maryland 20740 , United States
- Department of Physics , University of Maryland , College Park , Maryland 20740 , United States
| | - Rodrigo Szostak
- Institute of Chemistry , University of Campinas , Campinas - SP 13083-970 , Brazil
| | - Edo Waks
- Institute for Research in Electronics and Applied Physics , University of Maryland , College Park , Maryland 20740 , United States
- Department of Electrical and Computer Engineering , University of Maryland , College Park , Maryland 20740 , United States
| | - Michael F Toney
- Stanford Synchrotron Radiation Lightsource , SLAC National Accelerator Laboratory , Menlo Park , California 94025 , United States
| | - Ana F Nogueira
- Stanford Synchrotron Radiation Lightsource , SLAC National Accelerator Laboratory , Menlo Park , California 94025 , United States
- Institute of Chemistry , University of Campinas , Campinas - SP 13083-970 , Brazil
| | - Bernardo R A Neves
- Institute for Research in Electronics and Applied Physics , University of Maryland , College Park , Maryland 20740 , United States
- Department of Physics , Federal University of Minas Gerais , Belo Horizonte - MG 31270-901 , Brazil
| | - Marina S Leite
- Department of Materials Science and Engineering , University of Maryland , College Park , Maryland 20740 , United States
- Institute for Research in Electronics and Applied Physics , University of Maryland , College Park , Maryland 20740 , United States
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46
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Almadori Y, Moerman D, Martinez JL, Leclère P, Grévin B. Multimodal noncontact atomic force microscopy and Kelvin probe force microscopy investigations of organolead tribromide perovskite single crystals. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2018; 9:1695-1704. [PMID: 29977703 PMCID: PMC6009450 DOI: 10.3762/bjnano.9.161] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Accepted: 05/15/2018] [Indexed: 05/29/2023]
Abstract
In this work, methylammonium lead tribromide (MAPbBr3) single crystals are studied by noncontact atomic force microscopy (nc-AFM) and Kelvin probe force microscopy (KPFM). We demonstrate that the surface photovoltage and crystal photostriction can be simultaneously investigated by implementing a specific protocol based on the acquisition of the tip height and surface potential during illumination sequences. The obtained data confirm the existence of lattice expansion under illumination in MAPbBr3 and that negative photocarriers accumulate near the crystal surface due to band bending effects. Time-dependent changes of the surface potential occurring under illumination on the scale of a few seconds reveal the existence of slow ion-migration mechanisms. Lastly, photopotential decay at the sub-millisecond time scale related to the photocarrier lifetime is quantified by performing KPFM measurements under frequency-modulated illumination. Our multimodal approach provides a unique way to investigate the interplay between the charges and ionic species, the photocarrier-lattice coupling and the photocarrier dynamics in hybrid perovskites.
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Affiliation(s)
- Yann Almadori
- Université Grenoble Alpes, CNRS, CEA, INAC-SyMMES, 38000 Grenoble, France
| | - David Moerman
- Laboratory for Chemistry of Novel Materials, Center of Innovation and Research in Materials & Polymers (CIRMAP), University of Mons, Place du Parc 20, B7000 Mons, Belgium
| | - Jaume Llacer Martinez
- Laboratory for Chemistry of Novel Materials, Center of Innovation and Research in Materials & Polymers (CIRMAP), University of Mons, Place du Parc 20, B7000 Mons, Belgium
| | - Philippe Leclère
- Laboratory for Chemistry of Novel Materials, Center of Innovation and Research in Materials & Polymers (CIRMAP), University of Mons, Place du Parc 20, B7000 Mons, Belgium
| | - Benjamin Grévin
- Université Grenoble Alpes, CNRS, CEA, INAC-SyMMES, 38000 Grenoble, France
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47
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Saraf R, Pu L, Maheshwari V. A Light Harvesting, Self-Powered Monolith Tactile Sensor Based on Electric Field Induced Effects in MAPbI 3 Perovskite. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30. [PMID: 29333705 DOI: 10.1002/adma.201705778] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Revised: 11/22/2017] [Indexed: 06/07/2023]
Abstract
Organolead trihalide perovskite MAPbI3 shows a distinctive combination of properties such as being ferroelectric and semiconducting, with ion migration effects under poling by electric fields. The combination of its ferroelectric and semiconducting nature is used to make a light harvesting, self-powered tactile sensor. This sensor interfaces ZnO nanosheets as a pressure-sensitive drain on the MAPbI3 film and once poled is operational for at least 72 h with just light illumination. The sensor is monolithic in structure, has linear response till 76 kPa, and is able to operate continuously as the energy harvesting mechanism is decoupled from its pressure sensing mechanism. It has a sensitivity of 0.57 kPa-1 , which can be modulated by the strength of the poling field. The understanding of these effects in perovskite materials and their application in power source free devices are of significance to a wide array of fields where these materials are being researched and applied.
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Affiliation(s)
- Rohit Saraf
- Department of Chemistry, Waterloo Institute of Nanotechnology, 200 University Ave. West, Waterloo, ON, N2L 3G1, Canada
| | - Long Pu
- Department of Chemistry, Waterloo Institute of Nanotechnology, 200 University Ave. West, Waterloo, ON, N2L 3G1, Canada
| | - Vivek Maheshwari
- Department of Chemistry, Waterloo Institute of Nanotechnology, 200 University Ave. West, Waterloo, ON, N2L 3G1, Canada
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Wang H, Zhou M, Luo H. Electric-Field-Induced Dynamic Electronic Junctions in Hybrid Organic-Inorganic Perovskites for Optoelectronic Applications. ACS OMEGA 2018; 3:1445-1450. [PMID: 31458473 PMCID: PMC6641526 DOI: 10.1021/acsomega.7b02009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Accepted: 01/23/2018] [Indexed: 05/30/2023]
Abstract
Organic-inorganic metal halide perovskites have attracted great attention as optoelectronic materials because of their low cost, relative insensitivity to defects, and solution-processible properties. However, some of their properties, such as thermal instability, toxicity, and current-voltage hysteresis still remain elusive. Ion migration, which has been proven to be a thermal-activated process, is regarded as one of the major origins of the hysteresis and thus detrimental to the long-term stability of the optoelectronic devices. Nevertheless, by using the external electric field to pole the perovskite, ion migration would be possible to be utilized to create dynamic electronic junctions. In this paper, electric-field-induced dynamic electronic junctions have been manipulated for photodetection and energy harvesting through the ion migration under external electric field. Ion-migration-induced p-n or n-p junction has been successfully created via tuning the polarity of the external applied voltage, which is used for photodetection with a relatively fast response. By freezing out of the nonuniformly distributed ions after migration at low temperature, we demonstrate that the ion-migration-induced dynamic junctions can function as an energy harvesting device with an external quantum efficiency of 20%.
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Xu RP, Li YQ, Jin TY, Liu YQ, Bao QY, O'Carroll C, Tang JX. In Situ Observation of Light Illumination-Induced Degradation in Organometal Mixed-Halide Perovskite Films. ACS APPLIED MATERIALS & INTERFACES 2018; 10:6737-6746. [PMID: 29389110 DOI: 10.1021/acsami.7b18389] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Organometal mixed-halide perovskite materials hold great promise for next-generation solar cells, light-emitting diodes, lasers, and photodetectors. Except for the rapid progress in the efficiency of perovskite-based devices, the stability issue over prolonged light illumination has severely hindered their practical application. The deterioration mechanism of organometal halide perovskite materials under light illumination has seldom been conducted to date, which is indispensable to the understanding and optimization of photon-harvesting process inside perovskite-based optoelectronic devices. Here, explicit degradation pathways and comprehensive microscopic understandings of white-light-induced degradation have been put forward for two organometal mixed-halide perovskite materials (e.g., MAPbI3-xClx and MAPbBr3-xClx) under high vacuum conditions. In situ compositional analysis and real-time film characterizations reveal that the decomposition of both mixed-halide perovskites starts at the grain boundaries, leading to the formation of hydrocarbons and ammonia gas with the residuals of PbI2(Cl), Pb, or PbClxBr2-x in the films. The degradation has been correlated to the localized trap states that induce strong coupling between photoexcited carriers and the crystal lattice.
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Affiliation(s)
- Rui-Peng Xu
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University , Suzhou 215123, P. R. China
| | - Yan-Qing Li
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University , Suzhou 215123, P. R. China
| | - Teng-Yu Jin
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University , Suzhou 215123, P. R. China
| | - Yue-Qi Liu
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University , Suzhou 215123, P. R. China
| | - Qin-Ye Bao
- Key Laboratory of Polar Materials and Devices, Ministry of Education, East China Normal University , Shanghai 200241, P. R. China
| | - Conor O'Carroll
- School of Physics, Trinity College Dublin, The University of Dublin , Dublin 2, Ireland
| | - Jian-Xin Tang
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University , Suzhou 215123, P. R. China
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50
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Varadwaj A, Varadwaj PR, Yamashita K. Revealing the Chemistry between Band Gap and Binding Energy for Lead-/Tin-Based Trihalide Perovskite Solar Cell Semiconductors. CHEMSUSCHEM 2018; 11:449-463. [PMID: 29218846 DOI: 10.1002/cssc.201701653] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Revised: 10/13/2017] [Indexed: 06/07/2023]
Abstract
A relationship between reported experimental band gaps (solid) and DFT-calculated binding energies (gas) is established, for the first time, for each of the four ten-membered lead (or tin) trihalide perovskite solar cell semiconductor series examined in this study, including CH3 NH3 PbY3 , CsPbY3 , CH3 NH3 SnY3 and CsSnY3 (Y=I(3-x) Brx=1-3 , I(3-x) Clx=1-3 , Br(3-x) Cl x=1-3 , and IBrCl). The relationship unequivocally provides a new dimension for the fundamental understanding of the optoelectronic features of solid-state solar cell thin films by using the 0 K gas-phase energetics of the corresponding molecular building blocks.
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Affiliation(s)
- Arpita Varadwaj
- Department of Chemical System Engineering, School of Engineering, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
- CREST-JST, 7 Gobancho, Chiyoda-ku, Tokyo, 102-0076, Japan
| | - Pradeep R Varadwaj
- Department of Chemical System Engineering, School of Engineering, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
- CREST-JST, 7 Gobancho, Chiyoda-ku, Tokyo, 102-0076, Japan
| | - Koichi Yamashita
- Department of Chemical System Engineering, School of Engineering, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
- CREST-JST, 7 Gobancho, Chiyoda-ku, Tokyo, 102-0076, Japan
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