Ionic Liquid-Tuned Crystallization for Stable and Efficient Perovskite Solar Cells

被引:18
作者
Ran, Junhui [1 ]
Wang, Hao [2 ]
Deng, Wen [3 ]
Xie, Haipeng [3 ]
Gao, Yongli [4 ]
Yuan, Yongbo [3 ]
Yang, Yingguo [5 ]
Ning, Zhijun [2 ]
Yang, Bin [1 ]
机构
[1] Hunan Univ, Coll Mat Sci & Engn, Changsha 410082, Hunan, Peoples R China
[2] ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China
[3] Cent South Univ, Sch Phys & Elect, Hunan Key Lab Super Microstruct & Ultrafast Proc, Changsha 410083, Hunan, Peoples R China
[4] Univ Rochester, Dept Phys & Astron, Rochester, NY 14627 USA
[5] Chinese Acad Sci, Shanghai Synchrotron Radiat Facil SSRF, Zhangjiang Lab, Shanghai Adv Res Inst,Shanghai Inst Appl Phys, Shanghai 201204, Peoples R China
基金
中国国家自然科学基金;
关键词
butylammonium acetate; ionic liquid; perovskite solar cell stability; tri-cation perovskite; STABILITY;
D O I
10.1002/solr.202200176
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
Long-term operational stability is a significant challenge for perovskite solar cells to become a commercial photovoltaic technology. Herein, a feasible approach is presented to improve both thermal and environmental stability of organic-inorganic hybrid perovskites by introducing ionic liquid butylammonium acetate (BAAc) to coordinate the PbI2 precursor solution through strong bonding interactions to tune crystallization of perovskites. Inverted planar solar cells based on BAAc-containing tri-cation perovskites result in a high efficiency of over 20%. More importantly, after 700 h of aging at 85 degrees C in the nitrogen environment and 650 h storage in the ambient condition with a relative humidity of 35 +/- 5%, the BAAc-treated devices are shown to be much more stable as maintained 79.5% and 76.3% of the initial power conversion efficiency, respectively. This work provides a promising strategy to tune crystallization of perovskites to improve long-term stability of perovskite solar cells.
引用
收藏
页数:9
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