钝化
材料科学
三元运算
光伏
钙钛矿(结构)
能量转换效率
卤化物
制作
光电子学
化学工程
无机化学
纳米技术
光伏系统
图层(电子)
化学
病理
工程类
生物
程序设计语言
替代医学
医学
计算机科学
生态学
作者
Meng Li,Zhao-Kui Wang,Ming‐Peng Zhuo,Yun Hu,Ke-Hao Hu,Qing-Qing Ye,Sagar M. Jain,Yingguo Yang,Xingyu Gao,Liang‐Sheng Liao
标识
DOI:10.1002/adma.201800258
摘要
Abstract Exploiting organic/inorganic hybrid perovskite solar cells (PSCs) with reduced Pb content is very important for developing environment‐friendly photovoltaics. Utilizing of Pb–Sn alloying perovskite is considered as an efficient route to reduce the risk of ecosystem pollution. However, the trade‐off between device performance and Sn substitution ratio due to the instability of Sn 2+ is a current dilemma. Here, for the first time, the highly efficient Pb–Sn–Cu ternary PSCs are reported by partial replacing of PbI 2 with SnI 2 and CuBr 2 . Sn 2+ substitution results in a redshift of the absorption onset, whereas worsens the film quality. Interestingly, Cu 2+ introduction can passivate the trap sites at the crystal boundaries of Pb–Sn perovskites effectively. Consequently, a power conversion efficiency as high as 21.08% in inverted planar Pb–Sn–Cu ternary PSCs is approached. The finding opens a new route toward the fabrication of high efficiency Pb–Sn alloying perovskite solar cells by Cu 2+ passivation.
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