Cross‐Linkable and Dual Functional Hybrid Polymeric Electron Transporting Layer for High‐Performance Inverted Polymer Solar Cells

• DOI: 10.1002/adma.201701507
• Publication Date: 2017-06-20T06:32:57Z
• Authors: Sheng Dong; Zhicheng Hu; Kai Zhang; Qingwu Yin; Xiaofang Jiang; Fei Huang; Yong Cao
• Keywords: Photocurrent; Active layer

A cross-linkable dual functional polymer hybrid electron transport layer (ETL) is developed by simply adding an amino-functionalized dopant (PN4N) and a light crosslinker into commercialized n-type semiconductor (N2200) matrix. It found that the resulting ETL not only has good solvent resistance, facilitating multilayers device fabrication but also exhibits much improved transporting/extraction properties due to doping between PN4N N2200. As result, using PTB7-Th:PC71 BM blend as active layer, inverted based on can yield prominent power conversion efficiency of around 10.07%. More interestingly, photovoltaic property studies bilayer devices suggest absorption contributes photocurrent hence simultaneously acts both cathode interlayer material acceptor. The solar cells function like novel architectures with combination bulk heterojunction miniature devices. This work provides new insights ETLs may be open up direction for design materials further improve performance.