期刊
SCIENCE BULLETIN
卷 63, 期 11, 页码 726-731出版社
ELSEVIER
DOI: 10.1016/j.scib.2018.05.003
关键词
Metal halide perovskite; Solar cells; Crystallization; Power conversion efficiency
资金
- National 1000 Young Talents Awards
- National Key Research and Development Program of China [2016YFB0700700]
- National Natural Science Foundation of China [61634001, 61574133]
- Hanergy Group
Perovskite crystal film quality is critical for obtaining efficient perovskite solar cells. Anti-solvent processing was used for fast crystallization of perovskite precursor film, which can form dense perovskite film. However, the crystals from this method are usually small due to the fast crystal growth process, which could lead to grain boundary recombination. Here, element chloride is introduced to enhance the perovskite layer crystallinity via slowing down the perovskite crystallization process by simultaneous introduction of methylammounium chloride (MACl) and cesium chloride (CsCl) into precursor solution. As a result, we achieve high quality of pin-hole free perovskite film with large crystal size. A power conversion efficiency of 21.55% with free of hysteresis of the device is obtained, which is among the highest efficiency of planar structure perovskite solar cells. (C) 2018 Science China Press. Published by Elsevier B.V. and Science China Press. All rights reserved.
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