钙钛矿(结构)
氧化镍
镍
材料科学
氧化还原
氧化物
能量转换效率
光伏
结晶
化学工程
无机化学
纳米技术
化学
光伏系统
光电子学
冶金
生态学
工程类
生物
作者
Sajjad Ahmad,Ruiman Ma,Jiawei Zheng,Cheuk Kai Gary Kwok,Qisen Zhou,Zhenwei Ren,Jin-Wook Kim,Xinjun He,Xiaoliang Zhang,Kin Man Yu,Wallace C. H. Choy
标识
DOI:10.1002/smtd.202200787
摘要
The inorganic hole transport layer of nickel oxide (NiOx ) has shown highly efficient, low-cost, and scalable in perovskite photovoltaics. However, redox reactions at the interface between NiOx and perovskites limit their commercialization. In this study, ABABr (4-(2-Aminoethyl) benzoic acid bromide) between the NiOx and different perovskite layers to address the issues has been introduced. How the ABABr interacts with NiOx and perovskites is experimentally and theoretically investigated. These results show that the ABABr molecule chemically reacts with the NiOx via electrostatic attraction on one side, whereas on the other side, it forms a strong hydrogen bond via the NH3+ group with perovskites layers, thus directly diminishing the redox reaction between the NiOx and perovskites layers and passivating the layer surfaces. Additionally, the ABABr interface modification leads to significant improvements in perovskite film morphology, crystallization, and band alignment. The perovskites solar cells (PSCs) based on an ABABr interface modification show power conversion efficiency (PCE) improvement by over 13% and maintain over 90% of its PCE after continuous operation at maximum power point for over 500 h. The work not only contributes to the development of novel interlayers for stable PSCs but also to the understanding of how to prevent interface redox reactions.
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