Enhanced Photovoltaic Performance and Thermal Stability of CH3NH3PbI3 Perovskite through Lattice Symmetrization
- Feng ShaoFeng ShaoState Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, ChinaHefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, ChinaMore by Feng Shao,
- Peng Qin*Peng Qin*E-mail: [email protected] (P.Q.).State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, ChinaMore by Peng Qin,
- Dong WangDong WangState Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, ChinaMore by Dong Wang,
- Guoqing ZhangGuoqing ZhangState Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, ChinaMore by Guoqing Zhang,
- Bo WuBo WuDivision of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371More by Bo Wu,
- Jianqiao HeJianqiao HeState Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, ChinaMore by Jianqiao He,
- Wei PengWei PengState Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, ChinaMore by Wei Peng,
- Tze Chien SumTze Chien SumDivision of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371More by Tze Chien Sum,
- Deliang Wang*Deliang Wang*E-mail: [email protected] (D.W.).Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, ChinaMore by Deliang Wang, and
- Fuqiang Huang*Fuqiang Huang*E-mail: [email protected] (F.H.).State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, ChinaState Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, ChinaMore by Fuqiang Huang
Abstract
The organic–inorganic lead halide perovskites are attractive materials for photovoltaic application. The most widely studied perovskites based on methyl ammonium organic cation are less likely to form an ideal high-symmetry configuration at room temperature, leading to the appearance of local lattice strain. Herein, this study reports a strategy for the construction of thermally stable cubic perovskites at room temperature through the incorporation of the larger organic cation dimethyl ammonium. Detailed characterization on the single crystals and thin films reveals the formation of cubic phase with the addition of a certain amount of dimethyl ammonium at room temperature. With the presence of dimethyl ammonium, the nonradiative recombination in perovskite is suppressed, showing a longer PL lifetime and hole diffusion length. The more efficient charge extraction leads to an improvement in the photocurrent density, and then the device efficiency from 17.1% to 18.6%, together with an enhanced thermal stability at 85 °C. The influence of incorporating a larger organic cation on the structural configuration, optical properties, charge extraction, as well as the photovoltaic performance is systematically investigated, which offers an alternative way to improve the intrinsic stability of hybrid perovskites.
Cited By
This article is cited by 2 publications.
- Yutong Wang, Run Long. Rapid Decoherence Induced by Light Expansion Suppresses Charge Recombination in Mixed Cation Perovskites: Time-Domain ab Initio Analysis. The Journal of Physical Chemistry Letters 2020, 11 (4) , 1601-1608. https://doi.org/10.1021/acs.jpclett.0c00139
- Dibyajyoti Ghosh, Debdipto Acharya, Liujiang Zhou, Wanyi Nie, Oleg V. Prezhdo, Sergei Tretiak, Amanda J. Neukirch. Lattice Expansion in Hybrid Perovskites: Effect on Optoelectronic Properties and Charge Carrier Dynamics. The Journal of Physical Chemistry Letters 2019, 10 (17) , 5000-5007. https://doi.org/10.1021/acs.jpclett.9b02020