Improving photovoltaic parameters of all-polymer solar cells through integrating two polymeric donors

• 作者: Kang An Feng Peng Wenkai Zhong Wanyuan Deng Difei Zhang Lei Ying Hongbin Wu Fei Huang Yong Cao
• 来源期刊: 中国科学：化学（英文版）
• 年，卷（期）: 2021,（11）
• 所属期刊栏目: ARTICLES
• 页码范围: 2010-2016
• 页数: 7页
• 语种: 英文

摘要

The incorporation of an additional component into the bulk-heterojunction light-harvesting layer of polymer solar cells has been considered as an effective strategy to enhance photovoltaic performance.Here we demonstrated that the photovoltaic parameters of all-polymer solar cells could be enhanced upon replacing a certain ratio of electron-donating polymer PTzBI-oF with a widely used wide-bandgap polymer donor PM6.The photoluminescent characterizations confirmed the F(o)rster resonance energy transfer from incorporated PM6 to PTzBI-oF.Moreover,the combination of Fourier-transform photocurrent spectroscopy and electroluminescence external quantum efficiencies measurements demonstrated reduced non-radiative recombination energy loss upon the incorporation of PM6,resulting in a slightly enhanced open-circuit voltage of 0.88 V of the ternary cell regarding the binary PTzBI-oF:PFA1 device.The optimized ternary blend devices comprising of PTzBI-oF:PM6:PFA1 presented an impressively high power conversion efficiency of 16.3％,and the efficiency remains 15％ on a device with an enlarged effective area of 1 cm2,demonstrating the great potential of these all-PSCs for potential applications.