材料科学
钙钛矿(结构)
甲脒
佩多:嘘
带隙
热稳定性
串联
光电子学
图层(电子)
钙钛矿太阳能电池
锡
化学工程
能量转换效率
纳米技术
复合材料
冶金
工程类
作者
Dan Chi,Shengxiang Huang,Meiying Zhang,Shaiqiang Mu,Yang Zhao,Yong Chen,Jingbi You
标识
DOI:10.1002/adfm.201804603
摘要
Abstract Low bandgap lead–tin (Pb–Sn) mixed perovskite solar cells have achieved high power conversion efficiency in excess of 17%. However, methylammonium (MA) cation is usually contained, and the thermal stability of MA is always a great concern. In this work, according to composition engineering, a nearly formamidinium (FA) based low‐bandgap Pb–Sn mixed perovskite FAPb 0.75 Sn 0.25 I 3 is being tried to explore as the absorber layer. Combined with interface engineering by replacing poly(3,4‐ethylenedioxythiophene)‐polystyrenesulfonic acid (PEDOT:PSS), layer with NiO x as hole transport layer, a power conversion efficiency of 17.25% is obtained. This low‐bandgap perovskite solar cell maintains about 91% of its original efficiency at 80 °C for 20 h, and 92% of its initial performance after 46 days storage at the room temperature. The good thermal stability of nearly FA based low‐bandgap perovskite could be good for delivering efficient and stable perovskite‐perovskite tandem solar cells.
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