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A Universal Strategy to Utilize Polymeric Semiconductors for Perovskite Solar Cells with Enhanced Efficiency and Longevity
Author(s) -
Li Fangchao,
Yuan Jianyu,
Ling Xufeng,
Zhang Yannan,
Yang Yingguo,
Cheung Sin Hang,
Ho Carr Hoi Yi,
Gao Xingyu,
Ma Wanli
Publication year - 2018
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201706377
Subject(s) - materials science , perovskite (structure) , passivation , polymer , chlorobenzene , conjugated system , nanotechnology , dissolution , chemical engineering , surface modification , layer (electronics) , catalysis , organic chemistry , composite material , engineering , chemistry
Abstract In this contribution, a facile and universal method is successfully reported to fabricate perovskite solar cells (PSCs) with enhanced efficiency and stability. Through dissolving functional conjugated polymers in antisolvent chlorobenzene to treat the spinning CH 3 NH 3 PbI 3 perovskite film, the resultant devices exhibit significantly enhanced efficiency and longevity simultaneously. In‐depth characterizations demonstrate that thin polymer layer well covers the top surface of perovskite film, resulting in certain surface passivation and morphology modification. More importantly, it is shown that through rational chemical modification, namely molecular fluorination, the air stability and photostability of the perovskite solar cells are remarkably enhanced. Considering the vast selection of conjugated polymer materials and easy functional design, promising new results are expected in further enhancement of device performance. It is believed that the findings provide exciting insights into the role of conjugated polymer in improving the current perovskite‐based solar cells.