材料科学
兴奋剂
富勒烯
能量转换效率
钙钛矿(结构)
光伏系统
光电子学
钙钛矿太阳能电池
电子迁移率
太阳能电池
有机太阳能电池
电导率
纳米技术
化学
复合材料
电气工程
有机化学
结晶学
物理化学
工程类
聚合物
作者
Enas M. Younes,Ashim Gurung,Behzad Bahrami,E.M. El-Maghraby,Quinn Qiao
出处
期刊:Carbon
[Elsevier]
日期:2021-08-01
卷期号:180: 226-236
被引量:22
标识
DOI:10.1016/j.carbon.2021.05.008
摘要
[6, 6]-phenyl C61butyric acid methyl ester (PC61BM) is a common fullerene derivative widely employed as an electron transport layer in inverted perovskite solar cells. However, major challenges such as interfacial recombination, current leakage and low mobility results in poor photovoltaic performance and stability for PC61BM-based devices. To overcome these issues, we demonstrated, for the first time, doping of the PC61BM with fullerene C60 to tailor the properties of the PC61BM. This doping approach helped to realize superior power conversion efficiency of perovskite solar cell with 17.46% versus pristine device with 14.20%. The C60 doped PC61BM reinforced the surface morphology of the PC61BM layer with reduced roughness and better coverage, up-shift of Fermi Level, higher electrical conductivity, higher maximum charge carrier generation rate, and higher charge collection probability. All these improvements contributed to reduced charge leakage at the interface, reduced charge recombination and promoted efficient charge transfer, transport, and collection. Furthermore, the enhanced hydrophobicity of the C60 doped PC61BM enabled superior ambient device stability compared to the pristine device. This work facilitates a simple and effective route to tailor perovskite solar cell performance towards higher efficiency and better stability.
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