钝化
材料科学
钙钛矿(结构)
电解质
平面的
磁滞
能量转换效率
阴极
化学工程
光电子学
钙钛矿太阳能电池
纳米技术
化学物理
电极
图层(电子)
物理化学
凝聚态物理
化学
计算机科学
工程类
计算机图形学(图像)
物理
作者
Ding Zheng,Ruixiang Peng,Gang Wang,Jenna L. Logsdon,Binghao Wang,Xiaobing Hu,Yao Chen,Vinayak P. Dravid,Michael R. Wasielewski,Junsheng Yu,Wei Huang,Ziyi Ge,Tobin J. Marks,Antonio Facchetti
标识
DOI:10.1002/adma.201903239
摘要
Abstract Recent perovskite solar cell (PSC) advances have pursued strategies for reducing interfacial energetic mismatches to mitigate energy losses, as well as to minimize interfacial and bulk defects and ion vacancies to maximize charge transfer. Here nonconjugated multi‐zwitterionic small‐molecule electrolytes (NSEs) are introduced, which act not only as charge‐extracting layers for barrier‐free charge collection at planar triple cation PSC cathodes but also passivate charged defects at the perovskite bulk/interface via a spontaneous bottom‐up passivation effect. Implementing these synergistic properties affords NSE‐based planar PSCs that deliver a remarkable power conversion efficiency of 21.18% with a maximum V OC = 1.19 V, in combination with suppressed hysteresis and enhanced environmental, thermal, and light‐soaking stability. Thus, this work demonstrates that the bottom‐up, simultaneous interfacial and bulk trap passivation using NSE modifiers is a promising strategy to overcome outstanding issues impeding further PSC advances.
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