期刊
ADVANCED MATERIALS
卷 30, 期 11, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201705786
关键词
bifunctional; conjugated molecules; perovskites; printable; solar cells
类别
资金
- Ministry of Science and Technology of China [2015AA034601]
- 111 Project [B07038]
- National Natural Science Foundation of China [91733301, 61474049, 21702069, 91433203, 51502141]
- Science and Technology Department of Hubei Province [2017AAA190]
- China Postdoctoral Science Foundation [2016M600588]
A bifunctional conjugated organic molecule 4-(aminomethyl) benzoic acid hydroiodide (AB) is designed and employed as an organic cation in organic-inorganic halide perovskite materials. Compared with the monofunctional cation benzylamine hydroiodide (BA) and the nonconjugated bifunctional organic molecule 5-ammonium valeric acid, devices based on AB-MAPbI(3) show a good stability and a superior power conversion efficiency of 15.6% with a short-circuit current of 23.4 mA cm(-2), an open-circuit voltage of 0.94 V, and a fill factor of 0.71. The bifunctional conjugated cation not only benefits the growth of perovskite crystals in the mesoporous network, but also facilitates the charge transport. This investigation helps explore new approaches to rational design of novel organic cations for perovskite materials.
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