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Highly Reproducible Fabrication of Perovskite Films with an Ultrawide Antisolvent Dripping Window for Large‐Scale Flexible Solar Cells
Author(s) -
Kong Xiangyu,
Jiang Yue,
Li Zhuoxi,
Zhou Youshuang,
Xu Zhengjie,
Cong Chen,
Gao Xingsen,
Lu Xubing,
Zhou Guofu,
Liu Jun-Ming,
Kempa Krzysztof,
Gao Jinwei
Publication year - 2021
Publication title -
solar rrl
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.544
H-Index - 37
ISSN - 2367-198X
DOI - 10.1002/solr.202000646
Subject(s) - perovskite (structure) , fabrication , materials science , energy conversion efficiency , nanotechnology , phase (matter) , window (computing) , chemical engineering , optoelectronics , chemistry , computer science , organic chemistry , medicine , alternative medicine , pathology , engineering , operating system
Although perovskite solar cells (PSCs) have exhibited a high‐power conversion efficiency, the reproducibility of high‐quality perovskite films is still a big challenge for large‐scale flexible devices. One reason is the super narrow antisolvent dripping window, the other one is the difficulty in controlling the secondary phases. Herein, 18C6 is introduced into the perovskite precursor to achieve a high‐quality and reproducible large‐scale (7 × 7 cm 2 ) flexible perovskite film by enlarging the antisolvent dripping window from 2 to 20 s, with an average efficiency of 13.33% (best 15.80%). Moreover, from the in situ grazing‐incidence wide‐angle X‐ray scattering result, the 2H phase perovskite is highly suppressed with the additive of 18C6. The generality of the approach is also demonstrated in other antisolvents such as ethyl acetate. This finding provides an innovative solution to the realization of repeatable, large‐scale solution fabrication of PSCs.