甲脒
铯
光伏
钙钛矿(结构)
碘化物
化学
材料科学
无机化学
卤化物
能量转换效率
钙钛矿太阳能电池
光伏系统
化学工程
电气工程
工程类
作者
Xingtao Wang,Yuetian Chen,Taiyang Zhang,Xiaoyu Wang,Yong Wang,Miao Kan,Yanfeng Miao,Haoran Chen,Xiaomin Liu,Xinjiang Wang,Jinjing Shi,Lijun Zhang,Yixin Zhao
出处
期刊:ACS energy letters
[American Chemical Society]
日期:2021-07-13
卷期号:6 (8): 2735-2741
被引量:31
标识
DOI:10.1021/acsenergylett.1c01013
摘要
The current reported wide band gap perovskites based on iodide–bromine mixed halide composition would suffer from halide segregation. Here, we reported Cs-rich wide band gap pure-iodide CsxFA1–x–yDMAyPbI3 (x > 0.5; y < 0.01) (denoted as CsFA) perovskites and successfully solved the problem of phase segregation in wide band gap perovskites. The comprehensive experimental and theoretical results indicated that, because of a mildly deformed octahedral framework, our fabricated CsFA pure-iodide wide band gap perovskites exhibit much higher stability than those mixed halide perovskites with similar band gaps under thermal or illumination stress. On the basis of a representative Cs0.7FA0.3–yDMAyPbI3 perovskite with a 1.65 eV band gap, the corresponding solar cells delivered a stable output of 19.40% with good photostability. Overall, our reported Cs-rich pure-iodide CsFA perovskites present promising candidates for wide band gap optoelectronic applications.
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