钝化
钙钛矿(结构)
材料科学
化学工程
能量转换效率
晶界
膜
开路电压
载流子寿命
纳米技术
图层(电子)
光电子学
硅
化学
复合材料
电压
电气工程
生物化学
微观结构
工程类
作者
Haodan Guo,Yanyan Fang,Hongbo Cheng,Jinpeng Wu,Yan Lei,Shumao Wang,Xiangrong Li,Yao Dai,Wanchun Xiang,Desheng Xue,Yue‐Jian Lin,Anders Hagfeldt
标识
DOI:10.1002/anie.202204148
摘要
Defect passivation via post-treatment of perovskite films is an effective method to fabricate high-performance perovskite solar cells (PSCs). However, the passivation durability is still an issue due to the weak and vulnerable bonding between passivating functional groups and perovskite defect sites. Here we propose a cholesterol derivative self-assembly strategy to construct crosslinked and compact membranes throughout perovskite films. These supramolecular membranes act as a robust protection layer against harsh operational conditions while providing effective passivation of defects from surface toward inner grain boundaries. The resultant PSCs exhibit a power conversion efficiency of 23.34 % with an impressive open-circuit voltage of 1.164 eV. The unencapsulated devices retain 92 % of their initial efficiencies after 1600 h of storage under ambient conditions, and remain almost unchanged after heating at 85 °C for 500 h in a nitrogen atmosphere, showing significantly improved stability.
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