钝化
材料科学
钙钛矿(结构)
能量转换效率
开路电压
钙钛矿太阳能电池
Crystal(编程语言)
化学工程
光伏系统
晶体结构
纳米技术
光电子学
电压
结晶学
图层(电子)
化学
物理
程序设计语言
工程类
生物
量子力学
计算机科学
生态学
作者
Xiaoyin Wu,Yue Jiang,Cong Chen,Jiali Guo,Xiangyu Kong,Yongliang Feng,Sujuan Wu,Xingsen Gao,Xubing Lu,Qianming Wang,Guofu Zhou,Yiwang Chen,Junming Liu,Krzysztof Kempa,Jinwei Gao
标识
DOI:10.1002/adfm.201908613
摘要
Abstract Triple cation perovskites (Cs 0.05 (MA 0.17 FA 0.83 ) 0.95 Pb(I 0.83 Br 0.17 ) 3 ) have received lots of attention owing to the excellent stability and photovoltaic performance. However, the development toward efficient solar cells has been significantly impeded by its intrinsic precursor instability, as well as defective crystal surface. Herein, a strategy for introducing the additive of 1,4,7,10,13,16‐hexaoxacyclooctadecane (18C6) in the precursor solution, rendering an excellent stability of more than one month, and the defect passivation effect on the crystal surface are demonstrated. In those perovskite solar cells, a power conversion efficiency of 20.73% has been achieved with a substantially improved open‐circuit voltage and fill factor. As evidenced by the density functional theory calculations, the fundamental reason relating to the enhanced performance is found to be the interaction effect between the 18C6 and cations, and in particular the formation of the 18C6/Pb complex. This finding represents an alternative strategy for achieving a stable precursor solution and efficient perovskite solar cells.
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