材料科学
钝化
钙钛矿(结构)
光伏系统
介电谱
能量转换效率
图层(电子)
光活性层
光电子学
活动层
聚合物
光致发光
聚合物太阳能电池
化学工程
纳米技术
复合材料
电极
电气工程
电化学
化学
物理化学
工程类
薄膜晶体管
作者
Fengjiu Yang,Hong En Lim,Feijiu Wang,Masaharu Ozaki,Ai Shimazaki,Jiewei Liu,Nur Baizura Mohamed,Keisuke Shinokita,Yuhei Miyauchi,Atsushi Wakamiya,Yasujiro Murata,Kazunari Matsuda
标识
DOI:10.1002/admi.201701256
摘要
Abstract Perovskite solar cells (PSCs) have attracted intensive attention as the most promising next‐generation photovoltaic technology because they both enable accelerated development of photovoltaic performance and are compatible with low‐cost fabrication methods. The strategy of interface engineering of the perovskite layer in PSCs is expected to result in further enhancement of the power conversion efficiency (PCE) of PSCs via minimizing the charge recombination loss. Here, a high current–voltage (stabilized power output) PCE of 20.4% (19.9%) in CH 3 NH 3 PbI 3 PSCs under reverse scanning conditions is demonstrated by incorporating a solution‐processed polymer layer of poly(methyl methacrylate) (PMMA) between the perovskite photoactive layer and the hole transport layer. Moreover, steady‐state and time‐resolved photoluminescence spectroscopy and impedance spectroscopy are used to reveal the mechanism of the enhancement of the photovoltaic performance and its stability by the PMMA layer in a CH 3 NH 3 PbI 3 PSC device. The morphology modification, surface passivation, and protection of the perovskite layer by the insulating PMMA layer substantially contribute to the enhancement of photovoltaic performance and its stability, despite a slight reduction of the charge extraction efficiency. The demonstrated high PCEs and insights obtained into the working mechanism of the PMMA layer pave the way for the industrial application of CH 3 NH 3 PbI 3 PSCs.
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