State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , 457 Zhongshan Road, Dalian 116023, China.
Graduate University of Chinese Academy of Sciences , Beijing 100049, China.
ACS Appl Mater Interfaces. 2017 Apr 19;9(15):13390-13395. doi: 10.1021/acsami.7b00745. Epub 2017 Apr 5.
Interfacial modification is crucial for improving the photovoltaic performance. In this work, we present an aminosilane as a molecular linker between the ZnO electron-transport layer and fullerene derivative phenyl-C-butyric acid methyl ester (PCBM)-based active layer for efficient inverted polymer solar cells. An enhancement in the power-conversion efficiency (PCE), from 8.47 to 9.46%, was achieved on using PTB7-Th as donors. The aminosilane molecular linker provides dual functionalities for enhanced PCE, including (1) passivating the ZnO surface and decreasing the surface work function of ZnO for energy-level alignment and (2) bonding onto the fullerene derivative PCBM-based active layer to reduce the interface contact resistance.
界面修饰对于提高光伏性能至关重要。在这项工作中，我们提出了一种氨丙基硅烷作为 ZnO 电子传输层和富勒烯衍生物苯基-C-丁酸甲酯（PCBM）基活性层之间的分子连接体，用于高效的倒置聚合物太阳能电池。使用 PTB7-Th 作为给体，功率转换效率（PCE）从 8.47%提高到 9.46%。氨丙基硅烷分子连接体提供了增强 PCE 的双重功能，包括（1）钝化 ZnO 表面并降低 ZnO 的表面功函数以进行能级对准，以及（2）键合到富勒烯衍生物 PCBM 基活性层上以降低界面接触电阻。
