中国科学院化学研究所林禹泽团队发现，具有低乌尔巴赫能量的硒杂环电子受体可用于铸态高性能有机太阳能电池。这一研究成果于2020年10月21日在线发表在国际学术期刊《美国化学会志》上。

Title: Selenium Heterocyclic Electron Acceptor with Small Urbach Energy for As-Cast High-Performance Organic Solar Cells

Author: Zhenzhen Zhang, Yawen Li, Guilong Cai, Yihang Zhang, Xinhui Lu, Yuze Lin

Issue&Volume: October 21, 2020

Abstract: Typical organic photovoltaic materials show high Urbach energies (ca. 25–50 meV), which is considerably higher than those of their inorganic counterparts and limits further improvement in the device efficiency of organic solar cells (OSCs). In this study, we introduce a facile method of selenium substitution to reduce the Urbach energy of organic photovoltaic materials to 20.4 meV (Y6Se), which is the lowest value reported for high-performance organic photovoltaic materials and very close to those (ca. 15 meV) of typical inorganic/hybrid semiconductors, such as crystalline silicon, gallium nitride, and lead-halide perovskite. Next, OSCs based on Y6Se showed 17.7% efficiency, which is among the best results for OSCs and the record efficiency of as-cast single junction OSCs to date.

DOI: 10.1021/jacs.0c08557

Source: https://pubs.acs.org/doi/10.1021/jacs.0c08557