钝化
钙钛矿(结构)
铁电性
材料科学
电子
光电子学
光致发光
能量转换效率
离子键合
电场
化学物理
光伏系统
纳米技术
离子
电介质
化学
物理
结晶学
图层(电子)
电气工程
有机化学
工程类
量子力学
作者
Xiaoli Xu,Lingbo Xiao,Jie Zhao,Bing‐Kun Pan,Jun Li,Wei‐Qiang Liao,Ren‐Gen Xiong,Guifu Zou
标识
DOI:10.1002/anie.202008494
摘要
The nonradiative recombination of electrons and holes has been identified as the main cause of energy loss in hybrid organic-inorganic perovskite solar cells (PSCs). Sufficient built-in field and defect passivation can facilitate effective separation of electron-hole pairs to address the crucial issues. For the first time, we introduce a homochiral molecular ferroelectric into a PSC to enlarge the built-in electric field of the perovskite film, thereby facilitating effective charge separation and transportation. As a consequence of similarities in ionic structure, the molecular ferroelectric component of the PSC passivates the defects in the active perovskite layers, thereby inducing an approximately eightfold enhancement in photoluminescence intensity and reducing electron trap-state density. The photovoltaic molecular ferroelectric PSCs achieve a power conversion efficiency as high as 21.78 %.
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