钝化
材料科学
钙钛矿(结构)
结晶
能量转换效率
Crystal(编程语言)
晶体生长
相(物质)
光电子学
光伏系统
纳米技术
化学工程
结晶学
化学
计算机科学
电气工程
程序设计语言
有机化学
图层(电子)
工程类
作者
Meizi Wu,Hongyan Wang,Yong Li,Ran Chen,Hui Zhou,Song Yang,Dong Xu,Kun Li,Zhongwei An,Shengzhong Liu,Zhike Liu
标识
DOI:10.1002/anie.202313472
摘要
It is found that the disordered growth of bottom perovskite film deteriorates the buried interface of perovskite solar cells (PSCs), so developing a new material to modify the buried interface for regulating the crystal growth and defect passivation is an effective approach for improving the photovoltaic performance of PSCs. Here, we developed a new ionic liquid crystal (ILC, 1-Dodecyl-3-methylimidazolium tetrafluoroborate) as both crystal regulator and defect passivator to modify the buried interface of PSCs. The high lattice matching between this ILC and perovskite promotes preferential growth of perovskite film along [001] direction, while the oriented ILC with mesomorphic phase has a strong chemical interaction with perovskite to passivate the interface defect, as a result, the modified buried interface exhibits suppressed defects, improved band alignment, reduced nonradiative recombination losses, and enhanced charge extraction. The ILC-modified PSC delivers a power conversion efficiency of 24.92 % and maintains 94 % of the original value after storage in ambient for 3000 h.
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