有机太阳能电池
激子
材料科学
能量转换
接受者
能量转换效率
富勒烯
离解(化学)
光电效应
光电子学
化学物理
太阳能
太阳能电池
作者
Yanan Shi,Yilin Chang,Kun Lu,Zhihao Chen,Jianqi Zhang,Yangjun Yan,Dingding Qiu,Yanan Liu,Muhammad Abdullah Adil,Wei Ma,Xiaotao Hao,Lingyun Zhu,Zhixiang Wei
标识
DOI:10.1038/s41467-022-30927-y
摘要
Minimizing energy loss is of critical importance in the pursuit of attaining high-performance organic solar cells. Interestingly, reorganization energy plays a crucial role in photoelectric conversion processes. However, the understanding of the relationship between reorganization energy and energy losses has rarely been studied. Here, two acceptors, Qx-1 and Qx-2, were developed. The reorganization energies of these two acceptors during photoelectric conversion processes are substantially smaller than the conventional Y6 acceptor, which is beneficial for improving the exciton lifetime and diffusion length, promoting charge transport, and reducing the energy loss originating from exciton dissociation and non-radiative recombination. So, a high efficiency of 18.2% with high open circuit voltage above 0.93 V in the PM6:Qx-2 blend, accompanies a significantly reduced energy loss of 0.48 eV. This work underlines the importance of the reorganization energy in achieving small energy losses and paves a way to obtain high-performance organic solar cells.
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