钝化
钙钛矿(结构)
材料科学
能量转换效率
光伏
碳纤维
化学工程
光电子学
纳米技术
光伏系统
图层(电子)
复合材料
电气工程
复合数
工程类
作者
Zhipeng Ma,Songyang Yuan,Jiahuan Deng,Mengqi Wang,Wenwen Wu,Dehua Tian,Zaizhu Lou,Wenzhe Li,Jiandong Fan
出处
期刊:Solar RRL
[Wiley]
日期:2023-01-26
卷期号:7 (6)
被引量:6
标识
DOI:10.1002/solr.202201079
摘要
The fast‐track development in all‐inorganic perovskite photovoltaics for high efficiency are still facing the defect issues including vacancy, undercoordinated ions, and dislocation at the surface/interface of perovskite materials. Herein, three kinds of small‐molecules difluorobenzylamine (DFBA) are found to act as the interfacial modification materials to stabilize and enhance the efficiency of all‐inorganic carbon perovskite CsPbI 3– x Br x solar cell. The fluorine atoms with different positions in the benzene ring are demonstrated by the density‐functional theory simulations and experiments to passivate the defect at the surface/interface of perovskites, boosting the photocarrier transfer. Accordingly, the most suitable 2,6‐DFBA is used to modify the perovskite to prepare hole‐transporting materials‐free carbon‐based CsPbI 3– x Br x ( X = 0.3) perovskite solar cells, and the interface‐modified device yields a power conversion efficiency (PCE) of 14.6%, the open‐circuit voltage is increased to 1.14 V, and the PCE of the unpackaged device remained at 92% of the initial PCE after 1680 h of storage at 20–30% air humidity.
科研通智能强力驱动
Strongly Powered by AbleSci AI