化学
X射线光电子能谱
钙钛矿(结构)
退火(玻璃)
带材弯曲
开路电压
能量转换效率
分析化学(期刊)
载流子
化学工程
光电子学
结晶学
电压
环境化学
材料科学
工程类
复合材料
量子力学
物理
作者
Zafar Iqbal,Roberto Félix,Artem Musiienko,Jarla Thiesbrummel,Hans Köbler,Emilio Gutierrez‐Partida,Thomas Gries,Elif Hüsam,Ahmed Saleh,Regan G. Wilks,Jiahuan Zhang,Martin Stolterfoht,Dieter Neher,Steve Albrecht,Marcus Bär,Antonio Abate,Qiong Wang
摘要
Here, we report a detailed surface analysis of dry- and ambient air-annealed CsPbI3 films and their subsequent modified interfaces in perovskite solar cells. We revealed that annealing in ambient air does not adversely affect the optoelectronic properties of the semiconducting film; instead, ambient air-annealed samples undergo a surface modification, causing an enhancement of band bending, as determined by hard X-ray photoelectron spectroscopy measurements. We observe interface charge carrier dynamics changes, improving the charge carrier extraction in CsPbI3 perovskite solar cells. Optical spectroscopic measurements show that trap state density is decreased due to ambient air annealing. As a result, air-annealed CsPbI3-based n-i-p structure devices achieved a 19.8% power conversion efficiency with a 1.23 V open circuit voltage.
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