材料科学
能量转换效率
钙钛矿(结构)
钙钛矿太阳能电池
光伏系统
单层
化学工程
混合太阳能电池
太阳能电池
纳米技术
密度泛函理论
光电子学
聚合物太阳能电池
计算化学
化学
工程类
生物
生态学
作者
Tao Zhu,Jun Su,Frédèric Labat,Ilaria Ciofini,Thierry Pauporté
标识
DOI:10.1021/acsami.9b18034
摘要
The family of organic-inorganic hybrid perovskite (OIHPs) materials is one of the most promising for very high-efficiency photovoltaic solar cell application. In the present work, the effect of a series of self-assembled monolayers placed at the TiO2-perovskite junction, on the functioning of triple cation perovskite solar cells has been investigated. We show that employing 4-chlorobenzoic acid leads to the marked boosting of the solar cell performances. The starting pristine cell had a power conversion efficiency (PCE) of 20.3% and the chemical engineering permitted to reach a PCE up to 21.35%. Our experimental study completed by density functional theory calculations and modeling show that this progress is due to the reduction of interfacial states, to the improvement of the quality of the OIHP material and to the structural continuity between TiO2 and the OIHP. Especially, we demonstrate that the interfacial chemical interactions are important to consider in the design of highly efficient devices.
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