钙钛矿(结构)
钝化
卤化物
碱金属
材料科学
氟化物
晶界
磁滞
粒度
化学工程
能量转换效率
金属
矿物学
无机化学
光电子学
化学
纳米技术
复合材料
冶金
图层(电子)
有机化学
微观结构
物理
量子力学
工程类
作者
Pengyu Xu,Hongjing Piao,Shuai Liu,Haihua Hu,Jie Ding,Jiahui Bao,Peng Wang,Xiaoping Wu,Lingbo Xu,Ping Lin,Haiyan He
标识
DOI:10.1088/1361-6463/abfc8b
摘要
Abstract Solution-processed organic/inorganic hybrid halide perovskites are a class of very promising photovoltaic materials because of their extraordinary optoelectronic properties. However, numerous intrinsic defects within perovskite films limit the performance enhancement of perovskite solar cells (PSCs). Herein, we introduce three different alkali metal fluoride additives into the perovskite precursor to modulate the defect behaviors. The addition of alkali metal fluorides, especially potassium fluoride (KF), significantly passivates grain boundaries and point defects within bulk perovskite films, contributing to increased carrier lifetime and reduced defect state density. By optimizing the concentration of additives, the PSC device with 1% KF added has realized a significantly enhanced power conversion efficiency of 20.11%, and ignorable hysteresis.
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