二亚胺
苝
异质结
钙钛矿(结构)
材料科学
电极
能量转换效率
阴极
图层(电子)
光电子学
等效串联电阻
光伏系统
纳米技术
化学工程
化学
分子
电气工程
工程类
有机化学
物理化学
电压
作者
Jie Min,Zhiguo Zhang,Yi Hou,César Omar Ramírez Quiroz,Thomas Przybilla,Carina Bronnbauer,Fei Guo,Karen Forberich,Hamed Azimi,Tayebeh Ameri,Erdmann Spiecker,Yongfang Li,Christoph J. Brabec
摘要
Perovskite hybrid solar cells (pero-HSCs) were demonstrated to be among the most promising candidates within the emerging photovoltaic materials with respect to their power conversion efficiency (PCE) and inexpensive fabrication. Further PCE enhancement mainly relies on minimizing the interface losses via interface engineering and the quality of the perovskite film. Here, we demonstrate that the PCEs of pero-HSCs are significantly increased to 14.0% by incorporation of a solution-processed perylene–diimide (PDINO) as cathode interface layer between the [6,6]-phenyl-C61 butyric acid methyl ester (PCBM) layer and the top Ag electrode. Notably, for PDINO-based devices, prominent PCEs over 13% are achieved within a wide range of the PDINO thicknesses (5–24 nm). Without the PDINO layer, the best PCE of the reference PCBM/Ag device was only 10.0%. The PCBM/PDINO/Ag devices also outperformed the PCBM/ZnO/Ag devices (11.3%) with the well-established zinc oxide (ZnO) cathode interface layer. This enhanced performance is due to the formation of a highly qualitative contact between PDINO and the top Ag electrode, leading to reduced series resistance (Rs) and enhanced shunt resistance (Rsh) values. This study opens the door for the integration of a new class of easily-accessible, solution-processed high-performance interfacial materials for pero-HSCs.
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