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Zhang H, Hou W, Hao Y, Song J, Zhang F. Unified Crystal Phase Control with MACl for Inducing Single-Crystal-Like Perovskite Thin Films in High-Pressure Fusion Toward High Efficiency Perovskite Solar Cell Modules. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2400173. [PMID: 38822718 DOI: 10.1002/smll.202400173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 05/13/2024] [Indexed: 06/03/2024]
Abstract
Perovskite solar cells, recognized for their high photovoltaic conversion efficiency (PCE), cost-effectiveness, and simple fabrication, face challenges in PCE improvement due to structural defects in polycrystalline films. This study introduces a novel fabrication method for perovskite films using methylammonium chloride (MACl) to align grain orientation uniformly, followed by a high-pressure process to merge these grains into a texture resembling single-crystal perovskite. Employing advanced visual fluorescence microscopy, charge dynamics in these films are analyzed, uncovering the significant impact of grain boundaries on photo-generated charge transport within perovskite crystals. A key discovery is that optimal charge transport efficiency and speed occur in grain centers when the grain size exceeds 10 µm, challenging the traditional view that efficiency peaks when grain size surpasses film thickness to form a monolayer. Additionally, the presence of large-sized grains enhances ion activation energy, reducing ion migration under light and improving resistance to photo-induced degradation. In application, a perovskite solar cell module with large grains achieve a PCE of 22.45%, maintaining performance with no significant degradation under continuous white LED light at 100 mA cm-2 for over 1000 h. This study offers a new approach to perovskite film fabrication and insights into optimizing perovskite solar cell modules.
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Affiliation(s)
- Hanhong Zhang
- State Key Laboratory of Radio Frequency Heterogeneous Integration(Shenzhen University), College of Physics and Optoelectronic Engineering, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen, 518060, P. R. China
| | - Wenjing Hou
- School of Physics and Optoelectronic Engineering, Faculty of Information Science and Engineering, Ocean University of China, Qingdao, 266100, P. R. China
| | - Yuying Hao
- College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan, 030024, P. R. China
| | - Jun Song
- State Key Laboratory of Radio Frequency Heterogeneous Integration(Shenzhen University), College of Physics and Optoelectronic Engineering, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen, 518060, P. R. China
| | - Fan Zhang
- School of Physics and Optoelectronic Engineering, Faculty of Information Science and Engineering, Ocean University of China, Qingdao, 266100, P. R. China
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Wang Y, Zha Y, Bao C, Hu F, Di Y, Liu C, Xing F, Xu X, Wen X, Gan Z, Jia B. Monolithic 2D Perovskites Enabled Artificial Photonic Synapses for Neuromorphic Vision Sensors. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2311524. [PMID: 38275007 DOI: 10.1002/adma.202311524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 01/23/2024] [Indexed: 01/27/2024]
Abstract
Neuromorphic visual sensors (NVS) based on photonic synapses hold a significant promise to emulate the human visual system. However, current photonic synapses rely on exquisite engineering of the complex heterogeneous interface to realize learning and memory functions, resulting in high fabrication cost, reduced reliability, high energy consumption and uncompact architecture, severely limiting the up-scaled manufacture, and on-chip integration. Here a photo-memory fundamental based on ion-exciton coupling is innovated to simplify synaptic structure and minimize energy consumption. Due to the intrinsic organic/inorganic interface within the crystal, the photodetector based on monolithic 2D perovskite exhibits a persistent photocurrent lasting about 90 s, enabling versatile synaptic functions. The electrical power consumption per synaptic event is estimated to be≈1.45 × 10-16 J, one order of magnitude lower than that in a natural biological system. Proof-of-concept image preprocessing using the neuromorphic vision sensors enabled by photonic synapse demonstrates 4 times enhancement of classification accuracy. Furthermore, getting rid of the artificial neural network, an expectation-based thresholding model is put forward to mimic the human visual system for facial recognition. This conceptual device unveils a new mechanism to simplify synaptic structure, promising the transformation of the NVS and fostering the emergence of next generation neural networks.
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Affiliation(s)
- Yun Wang
- Center for Future Optoelectronic Functional Materials, School of Computer and Electronic Information/School of Artificial Intelligence, Nanjing Normal University, Nanjing, 210023, P. R. China
| | - Yanfang Zha
- Center for Future Optoelectronic Functional Materials, School of Computer and Electronic Information/School of Artificial Intelligence, Nanjing Normal University, Nanjing, 210023, P. R. China
| | - Chunxiong Bao
- National Laboratory of Solid State Microstructures, Nanjing University, Nanjing, 210093, P. R. China
| | - Fengrui Hu
- National Laboratory of Solid State Microstructures, Nanjing University, Nanjing, 210093, P. R. China
| | - Yunsong Di
- Center for Future Optoelectronic Functional Materials, School of Computer and Electronic Information/School of Artificial Intelligence, Nanjing Normal University, Nanjing, 210023, P. R. China
| | - Cihui Liu
- Center for Future Optoelectronic Functional Materials, School of Computer and Electronic Information/School of Artificial Intelligence, Nanjing Normal University, Nanjing, 210023, P. R. China
| | - Fangjian Xing
- Center for Future Optoelectronic Functional Materials, School of Computer and Electronic Information/School of Artificial Intelligence, Nanjing Normal University, Nanjing, 210023, P. R. China
| | - Xingyuan Xu
- State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing, 100876, P. R. China
| | - Xiaoming Wen
- Centre for Atomaterials and Nanomanufacturing, School of Science, RMIT University, Melbourne, Victoria, 3000, Australia
| | - Zhixing Gan
- Center for Future Optoelectronic Functional Materials, School of Computer and Electronic Information/School of Artificial Intelligence, Nanjing Normal University, Nanjing, 210023, P. R. China
- National Laboratory of Solid State Microstructures, Nanjing University, Nanjing, 210093, P. R. China
- College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, 266042, P. R. China
| | - Baohua Jia
- Centre for Atomaterials and Nanomanufacturing, School of Science, RMIT University, Melbourne, Victoria, 3000, Australia
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Li D, Sun X, Zhang Y, Guan Z, Yue Y, Wang Q, Zhao L, Liu F, Wei J, Li H. Uniaxial-Oriented Perovskite Films with Controllable Orientation. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2401184. [PMID: 38467038 PMCID: PMC11109632 DOI: 10.1002/advs.202401184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Indexed: 03/13/2024]
Abstract
Perovskite films with large crystal size, preferred orientation, and facile fabrication process, combining advantages of single-crystal and polycrystalline films, have gained considerable attention recently. However, there is little research on the facet properties of perovskite films. Here, (111)- and (001)-oriented perovskite films with bandgaps ranging from 1.53 to 1.77 eV, and systematically investigated their orientation-dependent properties are achieved. The (111)-oriented films show electron-dominated traps and the (001)-oriented films show hole-dominated traps, which are related to their atomic arrangement at the surface. Compared with the (001)-oriented films, the (111)-oriented films exhibit lower work function and superior water/oxygen robustness. For the wide-bandgap films, the lattice of the (001)-oriented film provides an unobstructed passage for ion migration. Comparably, the (111)-oriented films exhibit suppressed ion migration and excellent phase stability. The optimized unencapsulated solar cells based on both (001) and (111) orientations show a similar high efficiency of ≈23%. The (111)-oriented solar cell exhibits excellent stability, maintaining 95% of its initial efficiency after 1500 h maximum power point (MPP) tracking test, and 97% initial efficiency after 3000 h aging in ambient conditions. This work paves the way for the rational design, controllable synthesis, and targeted optimization of uniaxial-oriented perovskite films for various electronic applications.
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Affiliation(s)
- Dongni Li
- Beijing Key Laboratory of Construction‐Tailorable Advanced Functional Materials and Green ApplicationsExperimental Center of Advanced MaterialsSchool of Materials Science and EngineeringBeijing Institute of TechnologyBeijing100081China
| | - Xiangyu Sun
- Beijing Key Laboratory of Construction‐Tailorable Advanced Functional Materials and Green ApplicationsExperimental Center of Advanced MaterialsSchool of Materials Science and EngineeringBeijing Institute of TechnologyBeijing100081China
| | - Yao Zhang
- Beijing Key Laboratory of Construction‐Tailorable Advanced Functional Materials and Green ApplicationsExperimental Center of Advanced MaterialsSchool of Materials Science and EngineeringBeijing Institute of TechnologyBeijing100081China
| | - Zhen Guan
- Beijing Key Laboratory of Construction‐Tailorable Advanced Functional Materials and Green ApplicationsExperimental Center of Advanced MaterialsSchool of Materials Science and EngineeringBeijing Institute of TechnologyBeijing100081China
| | - Yansong Yue
- Beijing Key Laboratory of Construction‐Tailorable Advanced Functional Materials and Green ApplicationsExperimental Center of Advanced MaterialsSchool of Materials Science and EngineeringBeijing Institute of TechnologyBeijing100081China
| | - Qingya Wang
- Beijing Key Laboratory of Construction‐Tailorable Advanced Functional Materials and Green ApplicationsExperimental Center of Advanced MaterialsSchool of Materials Science and EngineeringBeijing Institute of TechnologyBeijing100081China
| | - Lu Zhao
- Beijing Key Laboratory of Construction‐Tailorable Advanced Functional Materials and Green ApplicationsExperimental Center of Advanced MaterialsSchool of Materials Science and EngineeringBeijing Institute of TechnologyBeijing100081China
| | - Fangze Liu
- Beijing Key Laboratory of Construction‐Tailorable Advanced Functional Materials and Green ApplicationsExperimental Center of Advanced MaterialsSchool of Materials Science and EngineeringBeijing Institute of TechnologyBeijing100081China
| | - Jing Wei
- Beijing Key Laboratory of Construction‐Tailorable Advanced Functional Materials and Green ApplicationsExperimental Center of Advanced MaterialsSchool of Materials Science and EngineeringBeijing Institute of TechnologyBeijing100081China
| | - Hongbo Li
- Beijing Key Laboratory of Construction‐Tailorable Advanced Functional Materials and Green ApplicationsExperimental Center of Advanced MaterialsSchool of Materials Science and EngineeringBeijing Institute of TechnologyBeijing100081China
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Wright AD, Patel JB, Johnston MB, Herz LM. Temperature-Dependent Reversal of Phase Segregation in Mixed-Halide Perovskites. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2210834. [PMID: 36821796 DOI: 10.1002/adma.202210834] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Revised: 01/24/2023] [Indexed: 05/12/2023]
Abstract
Understanding the mechanism of light-induced halide segregation in mixed-halide perovskites is essential for their application in multijunction solar cells. Here, photoluminescence spectroscopy is used to uncover how both increases in temperature and light intensity can counteract the halide segregation process. It is observed that, with increasing temperature, halide segregation in CH3 NH3 Pb(Br0.4 I0.6 )3 first accelerates toward ≈290 K, before slowing down again toward higher temperatures. Such reversal is attributed to the trade-off between the temperature activation of segregation, for example through enhanced ionic migration, and its inhibition by entropic factors. High light intensities meanwhile can also reverse halide segregation; however, this is found to be only a transient process that abates on the time scale of minutes. Overall, these observations pave the way for a more complete model of halide segregation and aid the development of highly efficient and stable perovskite multijunction and concentrator photovoltaics.
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Affiliation(s)
- Adam D Wright
- Clarendon Laboratory, Department of Physics, University of Oxford, Parks Road, Oxford, OX1 3PU, UK
| | - Jay B Patel
- Clarendon Laboratory, Department of Physics, University of Oxford, Parks Road, Oxford, OX1 3PU, UK
| | - Michael B Johnston
- Clarendon Laboratory, Department of Physics, University of Oxford, Parks Road, Oxford, OX1 3PU, UK
| | - Laura M Herz
- Clarendon Laboratory, Department of Physics, University of Oxford, Parks Road, Oxford, OX1 3PU, UK
- Institute for Advanced Study, Technical University of Munich (TUM), Lichtenbergstraße 2a, 85748, Garching bei München, Germany
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Lv Y, Zhang J, Chen X, Wang L. Enlighten the non-illuminated region by phase segregation of mixed halide perovskites. LIGHT, SCIENCE & APPLICATIONS 2022; 11:311. [PMID: 36289194 PMCID: PMC9606264 DOI: 10.1038/s41377-022-01019-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The well-known ion migration in mixed halide perovskites has been intensely investigated within the area under uniform light illumination. Here, the authors demonstrate that the anion segregation in these materials is a nonlocal effect of which the ion redistribution may occur at a macroscopic or mesoscopic scale beyond.
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Affiliation(s)
- Yan Lv
- School of Flexible Electronics (Future Technologies) & Institute of Advanced Materials, Key Laboratory of Flexible Electronics, Jiangsu National Synergetic Innovation Center for Advanced Materials, School of Physical and Mathematical Sciences, Nanjing Tech University, Nanjing, 211816, China
| | - Junran Zhang
- School of Flexible Electronics (Future Technologies) & Institute of Advanced Materials, Key Laboratory of Flexible Electronics, Jiangsu National Synergetic Innovation Center for Advanced Materials, School of Physical and Mathematical Sciences, Nanjing Tech University, Nanjing, 211816, China
| | - Xiaolong Chen
- Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen, 518055, China.
| | - Lin Wang
- School of Flexible Electronics (Future Technologies) & Institute of Advanced Materials, Key Laboratory of Flexible Electronics, Jiangsu National Synergetic Innovation Center for Advanced Materials, School of Physical and Mathematical Sciences, Nanjing Tech University, Nanjing, 211816, China.
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