期刊
CHEMSUSCHEM
卷 9, 期 18, 页码 2708-2714出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201601030
关键词
doping; fluorination; perovskite; solar cells; stability
资金
- Swiss National Science Foundation
- European Union Seventh Framework Programme [607232]
The principle limitation of perovskite solar cells is related to their instability and, hence, their limited lifetime. Herein, we employ an imidazolium iodide dopant, 1-methyl-3-(1H,1H,2H,2H-nonafluorohexyl)-imidazolium iodide, containing a perfluorous appendage, which leads to prolonged (unencapsulated, under Ar atmosphere) device activities exceeding 100days without compromising the power conversion efficiency and other photovoltaic parameters. The extended lifetime of the device can be attributed, at least in part, to the hydrophobic nature of the imidazolium iodide salt. The functionalization of the perovskite material was found to have negligible influence on the perovskite crystal structure.
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