钙钛矿(结构)
石墨烯
材料科学
光电子学
接口(物质)
平面的
纳米技术
化学工程
工程物理
复合材料
毛细管数
计算机科学
计算机图形学(图像)
工程类
毛细管作用
作者
Xiaojuan Zhao,Leiming Tao,Hao Li,Wenchao Huang,Pengyu Sun,Jun Liu,Shuangshuang Liu,Qiang Sun,Zhifang Cui,Lijie Sun,Yan Shen,Yang Yang,Mingkui Wang
出处
期刊:Nano Letters
[American Chemical Society]
日期:2018-03-14
卷期号:18 (4): 2442-2449
被引量:206
标识
DOI:10.1021/acs.nanolett.8b00025
摘要
Organic–inorganic hybrid lead halide perovskites have been widely investigated in optoelectronics both experimentally and theoretically. The present work incorporates chemically modified graphene into nanocrystal SnO2 as the electron transporting layer (ETL) for highly efficient planar perovskite solar cells. The modification of SnO2 with highly conductive two-dimensional naphthalene diimide-graphene can increase surface hydrophobicity and form van der Waals interaction between the surfactant and the organic–inorganic hybrid lead halide perovskite compounds. As a result, highly efficient perovskite solar cells with power conversion efficiency of 20.2% can be achieved with an improved fill factor of 82%, which could be mainly attributed to the augmented charge extraction and transport.
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