Narrow bandgap Sn-Pb perovskite solar cells with high operational stability modulated by imidazoline derivative

被引:1
|
作者
Zou, Feilin [1 ]
Duan, Chenghao [1 ,2 ]
Lin, Zhuojia [1 ]
Zhang, Zheng [1 ]
Xu, Shuang [1 ]
Chen, Chang [1 ]
Chen, Jianwei [1 ]
Li, Jiong [1 ]
Zou, Shibing [1 ]
Ding, Liming [3 ]
Luo, Hongze [4 ]
Yan, Keyou [1 ]
机构
[1] South China Univ Technol, Sch Environm & Energy, State Key Lab Luminescent Mat & Devices, Guangdong Prov Key Lab Solid Wastes Pollut Control, Guangzhou 510000, Peoples R China
[2] Chinese Univ Hong Kong, Dept Phys, Shatin, Hong Kong, Peoples R China
[3] Chinese Acad Sci, Natl Ctr Nanosci & Technol, Key Lab Nanosyst & Hierarch Fabricat CAS, Ctr Excellence Nanosci, Beijing 100190, Peoples R China
[4] Council Sci & Ind Res CSIR, Energy Ctr, POB 395, ZA-0001 Pretoria, South Africa
基金
中国国家自然科学基金;
关键词
Sn-Pb perovskites; 2-hydrazino-2-imidazoline hydrobromide; Hydrogen bond; Operational stability; Ion migration; EFFICIENCY;
D O I
10.1016/j.cej.2024.152118
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Sn-Pb mixed perovskites with narrow bandgap (NBG) are important for high-performance single- and multijunction perovskite solar cells (PSCs). However, the inherent Sn2+ oxidation and ion migration lead to inferior stability. Herein, 2-hydrazino-2-imidazoline hydrobromide (2H2I) is employed as a coordinating additive to regulate the film crystallization and inhibit Sn2+ oxidation. Meanwhile, 2H2I can form hydrogen bonds with Iions to suppress ion migration, thereby improving photovoltaic stability. The target FA0.8Cs0.2Sn0.5Pb0.5I3:2H2I PSC exhibits a champion power conversion efficiency (PCE) of 22.44 %, higher than that of the control device (19.16 %). The target devices retain 90 % (T90) and 80 % (T80) of the initial PCE under maximum power point (MPP) tracking for 1360 h at room temperature and for 436 h at 65 degrees C, respectively, the highest values for NBG Sn-Pb PSCs. This work demonstrates an effective strategy toward photothermally stable Sn-Pb PSCs.
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页数:8
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