发光
有机太阳能电池
接受者
材料科学
电致发光
能量转换效率
量子效率
光电子学
富勒烯
光化学
辐射传输
化学物理
纳米技术
化学
物理
光学
有机化学
图层(电子)
复合材料
凝聚态物理
聚合物
作者
Chengliang He,Zeng Chen,Tonghui Wang,Ziqiu Shen,Yaokai Li,Jiadong Zhou,Jianwei Yu,Huiyu Fang,Yuhao Li,Shuixing Li,Xinhui Lu,Wei Ma,Feng Gao,Zengqi Xie,Veaceslav Coropceanu,Haiming Zhu,Jean‐Luc Brédas,Lijian Zuo,Hongzheng Chen
标识
DOI:10.1038/s41467-022-30225-7
摘要
Enhancing the luminescence property without sacrificing the charge collection is one key to high-performance organic solar cells (OSCs), while limited by the severe non-radiative charge recombination. Here, we demonstrate efficient OSCs with high luminescence via the design and synthesis of an asymmetric non-fullerene acceptor, BO-5Cl. Blending BO-5Cl with the PM6 donor leads to a record-high electroluminescence external quantum efficiency of 0.1%, which results in a low non-radiative voltage loss of 0.178 eV and a power conversion efficiency (PCE) over 15%. Importantly, incorporating BO-5Cl as the third component into a widely-studied donor:acceptor (D:A) blend, PM6:BO-4Cl, allows device displaying a high certified PCE of 18.2%. Our joint experimental and theoretical studies unveil that more diverse D:A interfacial conformations formed by asymmetric acceptor induce optimized blend interfacial energetics, which contributes to the improved device performance via balancing charge generation and recombination.
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