锡
光伏
钙钛矿(结构)
材料科学
钝化
结晶
能量转换效率
硫氰酸盐
化学工程
光伏系统
纳米技术
光电子学
无机化学
化学
冶金
电气工程
图层(电子)
工程类
作者
Junjie Cao,Yanhui Lou,Wanlin Yang,Kai‐Li Wang,Zhenhuang Su,Jing Chen,Chun‐Hao Chen,Chong Dong,Xingyu Gao,Zhao‐Kui Wang
标识
DOI:10.1016/j.cej.2021.133832
摘要
Serious issues such as easy-oxidation of Sn2+, fast crystallization rate and high defect density are still existing in tin perovskites to restrain their photovoltaic performance. Herein, a strategy of bottom passivation by potassium thiocyanate (KSCN) has been developed in FA0.75MA0.25SnBrI2-based perovskite solar cells. KSCN interlayer exhibited multifunctional roles in aligning energy levels, assisting perovskite crystallization and promoting charge transport. The resulting champion device delivered superior power conversion efficiency (PCE) as high as 11.17% under AM 1.5G illumination. It is worth noting that the champion indoor photovoltaics efficiency under 2956 [email protected] lx (334.41 μW/cm2) illumination could approach 17.57%, which is the highest PCE for tin perovskite photovoltaics to our knowledge. The outstanding indoor performance demonstrates the huge application potential of eco-friendly tin perovskites.
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