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Origin of high efficiency and long-term stability in ionic liquid perovskite photovoltaic
Chao, Lingfeng1; Niu, Tingting1; Gu, Hao2; Yang, Yingguo3; Wei, Qi1; Xia, Yingdong2; Hui, Wei2; Zuo, Shouwei4; Zhu, Zhaohua2; Pei, Chengjie2; Li, Xiaodong5; Zhang, Jing4; Fang, Junfeng5; Xing, Guichuan6; Li, Hai2; Huang, Xiao2; Gao, Xingyu3; Ran, Chenxin1; Song, Lin1; Fu, Li1; Chen, Yonghua1,2; Huang, Wei1,2,7
Source PublicationResearch
AbstractEnvironment-friendly protic amine carboxylic acid ionic liquids (ILs) as solvents is a significant breakthrough with respect to traditional highly coordinating and toxic solvents in achieving efficient and stable perovskite solar cells (PSCs) with a simple one-step air processing and without an antisolvent treatment approach. However, it remains mysterious for the improved efficiency and stability of PSCs without any passivation strategy. Here, we unambiguously demonstrate that the three functions of solvents, additive, and passivation are present for protic amine carboxylic acid ILs. We found that the ILs have the capability to dissolve a series of perovskite precursors, induce oriented crystallization, and chemically passivate the grain boundaries. This is attributed to the unique molecular structure of ILs with carbonyl and amine groups, allowing for strong interaction with perovskite precursors by forming C=O Pb chelate bonds and N-H I hydrogen bonds in both solution and film. This finding is generic in nature with extension to a wide range of IL-based perovskite optoelectronics. © 2020 Lingfeng Chao et al.
KeywordPerovskite solar cells Carboxylic acids Efficiency Grain boundaries Hydrogen bonds Ionic liquids Passivation Perovskite Solvents Environment friendly High efficiency Ionic liquid (ils) Long term stability Oriented crystallization Passivation strategy Strong interaction Toxic solvents
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Affiliation1.Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE), Xi'an Institute of Biomedical Materials and Engineering, Northwestern Polytechnical University, 127 West Youyi Road, Xi'an; 710072, China;
2.Key Laboratory of Flexible Electronics (KLOFE), Institution of Advanced Materials (IAM), Nanjing Tech University (Nanjing Tech), Nanjing, Jiangsu; 211816, China;
3.Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai; 201204, China;
4.Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing; 100049, China;
5.School of Physics and Electronic Science, Ministry of Education, Nanophotonics and Advanced Instrument Engineering Research Center, East China Normal University, Shanghai; 200062, China;
6.Institute of Applied Physics and Materials Engineering, University of Macau, 999078, China;
7.Key Laboratory for Organic Electronics and Information Displays (KLOEID), Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, Nanjing, Jiangsu; 210023, China
Recommended Citation
GB/T 7714
Chao, Lingfeng,Niu, Tingting,Gu, Hao,et al. Origin of high efficiency and long-term stability in ionic liquid perovskite photovoltaic[J]. Research,2020,2020.
APA Chao, Lingfeng.,Niu, Tingting.,Gu, Hao.,Yang, Yingguo.,Wei, Qi.,...&Huang, Wei.(2020).Origin of high efficiency and long-term stability in ionic liquid perovskite photovoltaic.Research,2020.
MLA Chao, Lingfeng,et al."Origin of high efficiency and long-term stability in ionic liquid perovskite photovoltaic".Research 2020(2020).
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