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Fully Inorganic CsSnI 3 Mesoporous Perovskite Solar Cells with High Efficiency and Stability via Coadditive Engineering
Author(s) -
Ban Huaxia,
Zhang Tao,
Gong Xiu,
Sun Qiang,
Zhang Xiao-Li,
Pootrakulchote Nuttapol,
Shen Yan,
Wang Mingkui
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.202100069
Subject(s) - mesoporous material , non blocking i/o , perovskite (structure) , energy conversion efficiency , materials science , glovebox , band gap , chemical engineering , nanotechnology , chemistry , catalysis , optoelectronics , organic chemistry , engineering
The small optical bandgap of a CsSnI 3 ‐based inorganic perovskite film makes it a hopeful candidate as an absorber layer in solar cell applications. Herein, a coadditive 2‐aminopyrazine (APZ) in the precursor solution to form SnF 2 −APZ complex with the aim to restrain Sn 2+ oxidation and thus improve the CsSnI 3 ‐based device performance is proposed. It is found that the amino group of APZ significantly suppresses oxidation of Sn 2+ through a Lewis acid–base addition reaction. Consequently, the CsSnI 3 ‐based mesoporous perovskite solar cells that use a printable c‐TiO 2 /m‐TiO 2 /Al 2 O 3 /NiO/carbon framework with high reproducibility achieve a power conversion efficiency of 5.12%. This is a champion efficiency for fully inorganic CsSnI 3 ‐based mesoporous devices reported up to now. Furthermore, after 60 days of storage in a N 2 ‐filled glovebox, the device still maintains an initial efficiency of 92%.
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