钝化
载流子寿命
钙钛矿(结构)
图层(电子)
能量转换效率
钙钛矿太阳能电池
光伏系统
磁滞
材料科学
化学工程
水分
太阳能电池
纳米技术
光电子学
硅
复合材料
电气工程
工程类
物理
量子力学
作者
Erdi Akman,Ahmed Esmail Shalan,Faranak Sadegh,Seçkin Akın
出处
期刊:Chemsuschem
[Wiley]
日期:2021-01-19
卷期号:14 (4): 1176-1183
被引量:100
标识
DOI:10.1002/cssc.202002707
摘要
Abstract Perovskite solar cells (PSCs) have shown great promise for photovoltaic applications, owing to their low‐cost assembly, exceptional performance, and low‐temperature solution processing. However, the advancement of PSCs towards commercialization requires improvements in efficiency and long‐term stability. The surface and grain boundaries of perovskite layer, as well as interfaces, are critical factors in determining the performance of the assembled cells. Defects, which are mainly located at perovskite surfaces, can trigger hysteresis, carrier recombination, and degradation, which diminish the power conversion efficiencies (PCEs) of the resultant cells. This study concerns the stabilization of the α‐FAPbI 3 perovskite phase without negatively affecting the spectral features by using 2,3,4,5,6‐pentafluorobenzyl phosphonic acid (PFBPA) as a passivation agent. Accordingly, high‐quality PSCs are attained with an improved PCE of 22.25 % and respectable cell parameters compared to the pristine cells without the passivation layer. The thin PFBPA passivation layer effectively protects the perovskite layer from moisture, resulting in better long‐term stability for unsealed PSCs, which maintain >90 % of the original efficiency under different humidity levels (40–75 %) after 600 h. PFBPA passivation is found to have a considerable impact in obtaining high‐quality and stable FAPbI 3 films to benefit both the efficiency and the stability of PSCs.
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