期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 59, 期 32, 页码 13354-13361出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202004256
关键词
all-inorganic perovskite; chemical interactions; perovskite solar cells; solution processed in air
资金
- Natural Science Foundation of China [51972172, 61705102, 61935017, 91833304]
- Projects of International Cooperation and Exchanges NSFC [51811530018]
- Young 1000 Talents Global Recruitment Program of China
- Jiangsu Specially Appointed Professor Program
All-inorganic lead halide perovskites are promising candidates for optoelectronic applications. However, fundamental questions remain over the component interaction in the perovskite precursor solution due to the limitation of the most commonly used solvents of N,N-dimethylformamide (DMF) and dimethyl sulfoxide (DMSO). Here, we report an interaction tailoring strategy for all-inorganic CsPbI3-xBrx perovskites by involving the ionic liquid solvent methylammonium acetate (MAAc). C=O shows strong interaction with lead (Pb2+) and N-H...I hydrogen bond formation is observed. The interactions stabilize the perovskite precursor solution and allow production of the high-quality perovskite films by retarding the crystallization. Without the necessity for antisolvent treatment, the one-step air-processing approach delivers photovoltaic cells regardless of humidity, with a high efficiency of 17.10 % along with long operation stability over 1500 h under continuous light illumination.
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