介孔材料
材料科学
SN2反应
钙钛矿(结构)
带隙
非阻塞I/O
纳米技术
化学工程
能量转换效率
光电子学
化学
催化作用
有机化学
工程类
作者
Huaxia Ban,Tao Zhang,X. G. Gong,Qiang Sun,Xiaoli Zhang,Nuttapol Pootrakulchote,Yan Shen,Mingkui Wang
出处
期刊:Solar RRL
[Wiley]
日期:2021-04-23
卷期号:5 (7): 2100069-2100069
被引量:21
标识
DOI:10.1002/solr.202100069
摘要
The small optical bandgap of a CsSnI3-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 SnF2−APZ complex with the aim to restrain Sn2+ oxidation and thus improve the CsSnI3-based device performance is proposed. It is found that the amino group of APZ significantly suppresses oxidation of Sn2+ through a Lewis acid–base addition reaction. Consequently, the CsSnI3-based mesoporous perovskite solar cells that use a printable c-TiO2/m-TiO2/Al2O3/NiO/carbon framework with high reproducibility achieve a power conversion efficiency of 5.12%. This is a champion efficiency for fully inorganic CsSnI3-based mesoporous devices reported up to now. Furthermore, after 60 days of storage in a N2-filled glovebox, the device still maintains an initial efficiency of 92%.
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