钙钛矿(结构)
钝化
材料科学
光伏系统
能量转换效率
碘化物
图层(电子)
光电子学
纳米技术
化学工程
无机化学
化学
电气工程
工程类
作者
Bowen Yang,Jishuan Suo,Francesco Di Giacomo,Selina Olthof,Dmitry Bogachuk,YeonJu Kim,Xiaoxiao Sun,Lukas Wagner,Fan Fu,Shaik M. Zakeeruddin,Andreas Hinsch,Michaël Grätzel,Aldo Di Carlo,Anders Hagfeldt
出处
期刊:ACS energy letters
[American Chemical Society]
日期:2021-10-15
卷期号:6 (11): 3916-3923
被引量:113
标识
DOI:10.1021/acsenergylett.1c01811
摘要
Tremendous efforts have been dedicated toward minimizing the open-circuit voltage deficits on perovskite solar cells (PSCs), and the fill factors are still relatively low. This hinders their further application in large scalable modules. Herein, we employ a newly designed ammonium salt, cyclohexylethylammonium iodide (CEAI), for interfacial engineering between the perovskite and hole-transporting layer (HTL), which enhanced the fill factor to 82.6% and consequent PCE of 23.57% on the target device. This can be associated with a reduction of the trap-assisted recombination rate at the 3D perovskite surface, via formation of a 2D perovskite interlayer. Remarkably, the property of the 2D perovskite interlayer along with the cyclohexylethyl group introduced by CEAI treatment also determines a pronounced enhancement in the surface hydrophobicity, leading to an outstanding stability of over 96% remaining efficiency of the passivated devices under maximum power point tracking with one sun illumination under N2 atmosphere at room temperature after 1500 h.
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