Jinfeng Huang, Tianyi Chen, Le Mei, Mengting Wang, Yuxuan Zhu, Jiting Cui, Yanni Ouyang, Youwen Pan, Zhaozhao Bi, Wei Ma, Zaifei Ma, Haiming Zhu, Chunfeng Zhang, Xian-Kai Chen, Hongzheng Chen, Lijian Zuo
Although asymmetric molecular design has been widely demonstrated effective for organic photovoltaics (OPVs), the correlation between asymmetric molecular geometry and their optoelectronic properties is still unclear. To access this issue, we have designed and synthesized several symmetric-asymmetric non-fullerene acceptors (NFAs) pairs with identical physical and optoelectronic properties. Interestingly, we found that the asymmetric NFAs universally exhibited increased open-circuit voltage compared to their symmetric counterparts, due to the reduced non-radiative charge recombination...
April 16, 2024: Nature Communications