钙钛矿(结构)
离子液体
材料科学
能量转换效率
化学工程
热稳定性
离子键合
分解
钙钛矿太阳能电池
水分
四氟硼酸盐
量子点
热分解
相(物质)
光电子学
化学
催化作用
有机化学
离子
复合材料
工程类
作者
Jiexuan Jiang,Ronghua Li,Dongliang Liu,Xie Hongtao,Qiugui Zeng,Yanbo Li
出处
期刊:ACS applied energy materials
[American Chemical Society]
日期:2023-05-05
卷期号:6 (10): 5378-5387
被引量:5
标识
DOI:10.1021/acsaem.3c00401
摘要
The all-inorganic CsPbI2Br perovskite possesses outstanding thermal stability as a light absorber in perovskite solar cells (PSCs) or photodetectors. Still, their sensitivity to moisture induces irreversible decomposition and a large number of halogen vacancy defects, hindering their commercial applications. Herein, by incorporating 1-butyl-3-methylimidazolium tetrafluoroborate (BMIMBF4) ionic liquids (ILs) as a precursor additive, a CsPbI2Br light absorber with an improved carrier lifetime and reduced trap density is achieved. Moreover, the modification of the perovskite surface with CsPbBr3 quantum dots (QDs) further improved the efficiency and moisture stability of the PSC. As a result, the BMIMBF4 IL and CsPbBr3 QD co-modified PSC achieves a maximum power conversion efficiency (PCE) of 15.37% and retained 80% of its initial PCE after exposure to ambient air for 60 h. This work proposes a synergistic approach for developing high-performance organic-free PSCs with an improved PCE and moisture stability.
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