Fully Inorganic CsSnI3 Mesoporous Perovskite Solar Cells with High Efficiency and Stability via Coadditive Engineering

被引：40
作者：
Ban, Huaxia [1 ]
Zhang, Tao [1 ]
Gong, Xiu [1 ]
Sun, Qiang [1 ]
Zhang, Xiao-Li [2 ]
Pootrakulchote, Nuttapol [3 ]
Shen, Yan [1 ]
Wang, Mingkui [1 ]
机构：
[1] Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan 430074, Peoples R China
[2] Zhengzhou Univ, Sch Mat Sci & Engn, State Ctr Int Cooperat Designer Low Carbon & Envi, Zhengzhou 450001, Peoples R China
[3] Chulalongkorn Univ, Fac Sci, Dept Chem Technol, Bangkok 10330, Thailand
来源：
SOLAR RRL | 2021年 / 5卷 / 07期
基金：
中国国家自然科学基金;
关键词：
additives; CsSnI3; inorganic perovskites; oxidation; solar cells;
D O I：
10.1002/solr.202100069
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
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 N-2-filled glovebox, the device still maintains an initial efficiency of 92%.
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页数：9
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