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Li Y, Qu S, Wu J, Fang H, Liu N, Cui P, Li M, Ai X. Unraveling Ion Migration Mechanisms under Operating Conditions in Perovskite Solar Cells by Variable-Load Transient Photoelectric Technique. J Phys Chem Lett 2024; 15:11903-11910. [PMID: 39571147 DOI: 10.1021/acs.jpclett.4c03068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/06/2024]
Abstract
Ion migration in perovskite solar cells (PSCs) significantly impacts their photoelectric performance and physicochemical stability. Existing research has predominantly focused on inhibiting ion migration through chemical strategies or observing it under open-circuit or short-circuit conditions. This focus has led to a limited theoretical understanding and control of ion migration under practical conditions, constraining advances in long-term stability. In this study, we introduce a novel variable-load transient photoelectric technique (VL-TPT) to investigate ion migration dynamics in PSCs under practical operating conditions. Results show that ion accumulation correlates with photogenerated carrier concentration under open-circuit conditions. During operation, ion accumulation decreases with reduced load, because charge is transferred to the external circuit, leading to a reduction in carrier concentration within the device. An unusual increase in interface ions is observed at low loads due to interactions between charges accumulated in the potential well and ions. Introducing FA+ in MA0.75FA0.25PbI3 devices suppresses ion migration in the open-circuit state but accelerates interface ion buildup under operating conditions. These findings provide valuable insights for enhancing device stability and performance.
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Affiliation(s)
- Yiyi Li
- Key Laboratory of Advanced Light Conversion Materials and Biophotonics, Department of Chemistry, Renmin University of China, Beijing 100872, China
| | - Shujie Qu
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China
| | - Jiyuan Wu
- Key Laboratory of Advanced Light Conversion Materials and Biophotonics, Department of Chemistry, Renmin University of China, Beijing 100872, China
| | - Haohui Fang
- Key Laboratory of Advanced Light Conversion Materials and Biophotonics, Department of Chemistry, Renmin University of China, Beijing 100872, China
| | - Ning Liu
- Key Laboratory of Advanced Light Conversion Materials and Biophotonics, Department of Chemistry, Renmin University of China, Beijing 100872, China
| | - Peng Cui
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China
| | - Meicheng Li
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China
| | - Xicheng Ai
- Key Laboratory of Advanced Light Conversion Materials and Biophotonics, Department of Chemistry, Renmin University of China, Beijing 100872, China
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Kalnoor BS, Bisht PB, Jena KC, Velkannan V, Bhyrappa P. Mixed β-Pyrrole Substituted meso-Tetraphenylporphyrins and Their Metal Complexes: Optical Nonlinearity Using Degenerate Four Wave Mixing Technique. J Phys Chem A 2013; 117:8216-21. [DOI: 10.1021/jp404451x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Basanth S. Kalnoor
- Department
of Physics and ‡Department of Chemistry, Indian Institute of Technology Madras, Chennai, 600 036, India
| | - Prem B. Bisht
- Department
of Physics and ‡Department of Chemistry, Indian Institute of Technology Madras, Chennai, 600 036, India
| | - Kailash C. Jena
- Department
of Physics and ‡Department of Chemistry, Indian Institute of Technology Madras, Chennai, 600 036, India
| | - V. Velkannan
- Department
of Physics and ‡Department of Chemistry, Indian Institute of Technology Madras, Chennai, 600 036, India
| | - P. Bhyrappa
- Department
of Physics and ‡Department of Chemistry, Indian Institute of Technology Madras, Chennai, 600 036, India
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Knox KJ, Symes R, Reid JP. Fluorescence spectroscopy and signalling from optically-tweezed aerosol droplets. Chem Phys Lett 2010. [DOI: 10.1016/j.cplett.2010.01.046] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Ishizaka S, Suzuki Y, Kitamura N. Laser trapping and picosecond time-resolved spectroscopy of water droplets in air: cavity-enhanced spontaneous emission of Ru(bpy)3Cl2. Phys Chem Chem Phys 2010; 12:9852-7. [DOI: 10.1039/c003887c] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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