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Additive‐Enhanced Crystallization of Solution Process for Planar Perovskite Solar Cells with Efficiency Exceeding 19 %
Author(s) -
You Shuai,
Bi Shiqing,
Huang Jing,
Jia Qiushuang,
Yuan Yuhe,
Xia Yanjie,
Xiao Zhenyu,
Sun Zhuzhu,
Liu Jiangfeng,
Sun Shujie,
Zhao Zhiqiang
Publication year - 2017
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201704181
Subject(s) - crystallization , perovskite (structure) , materials science , energy conversion efficiency , chemical engineering , crystal (programming language) , crystal growth , planar , optoelectronics , crystallography , chemistry , computer science , computer graphics (images) , engineering , programming language
To reduce intrinsic defect density in perovskite films, various additives are often added into the precursor solution. In this paper, a novel solution, in which isopropanol (IPA) was added into the precursor solution, was developed for the preparation of normal planar perovskite solar cells (PSCs). A champion power conversion efficiency (PCE) of 19.70 % was achieved with this approach. By adding IPA into the precursor solution, CH 3 NH 3 PbI 3 perovskite showed better crystallization and stability, indicating improved film quality. Because of the improved morphology of perovskite crystal, the PCE of PSCs increased. In addition, the unencapsulated PSCs retained high output for up to 40 days in air at room temperature, indicating the stability of PSCs. These results may provide a new avenue for manufacturing high efficiency and high stability PSCs.