双功能
钝化
钙钛矿(结构)
化学
卤化物
光伏
溴化物
兴奋剂
吸光度
带隙
无机化学
相(物质)
光伏系统
化学工程
光电子学
有机化学
催化作用
材料科学
色谱法
工程类
生物
图层(电子)
生态学
作者
Yong Wang,Taiyang Zhang,Miao Kan,Yixin Zhao
摘要
The all-inorganic α-CsPbI3 perovskite with the most suitable band gap faces serious challenges of low phase stability and high moisture sensitivity. We discover that a simple phenyltrimethylammonium bromide (PTABr) post-treatment could achieve a bifunctional stabilization including both gradient Br doping (or alloying) and surface passivation. The PTABr treatment on CsPbI3 only induces less than 5 nm blue shift in UV-vis absorbance but significantly stabilize the perovskite phase with much better stability. Finally, the highly stable PTABr treated CsPbI3 based perovskite solar cells exhibit a reproducible photovoltaic performance with a champion efficiency up to 17.06% and stable output of 16.3%. Therefore, this one-step bifunctional stabilization of perovskite through gradient halide doping and surface organic cation passivation presents a novel and promising strategy to design stable and high performance all-inorganic lead halide.
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