结晶度
碘化物
材料科学
醋酸铅
钙钛矿(结构)
能量转换效率
碘化氢
化学工程
光伏系统
相(物质)
纳米技术
无机化学
化学
光电子学
有机化学
碘
复合材料
生态学
冶金
工程类
生物
毒性
作者
Honggang Xie,Jiannan Xu,Can Gao,Jiejing Zhang,Gao Chen,Xizhe Liu
出处
期刊:Solar Energy
[Elsevier]
日期:2021-07-01
卷期号:222: 212-218
被引量:8
标识
DOI:10.1016/j.solener.2021.05.033
摘要
CsPbI3 triggers strong interest in the photovoltaic community for their promising photoelectric property and nonvolatility. However, CsPbI3 layers with a-phase crystal structure are difficult for preparation, and these layers easily degrade to non-photoactive δ-phase at room temperature. Tuning the composition of precursor solutions is an important method for improving the properties of CsPbI3 layers. Herein, we prepare inorganic a-CsPbI3 perovskite solar cells using lead acetate as the lead source, which is different from conventional precursors with lead iodide as the lead source. The lead acetate precursor needs neither incorporating hydrogen iodide nor preparing PbI2 complex, and it is shown to enlarge the grain size, improve the crystallinity and reduce the trap density of CsPbI3 layers. By cooperating the lead acetate precursor with EDAI2 additive, the power conversion efficiency (PCE) of devices increases from 9.2% to 12.9% and the photo-stability of these devices is improved simultaneously.
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