Optimizing the components and morphology within the photoactive layer of organic solar cells (OSCs) can significantly enhance their power conversion efficiency (PCE). A new A-D-A type non-fullerene acceptor IDMIC-4F is designed and synthesized in this work, and is employed as the third component to prepare high performance ternary solar cells. IDMIC-4F can form fibrils after solution casting, and the presence of this fibrillar structure in the PBDB-T-2F:BTP-4F host confines the growth of donors and acceptors into fine domains, as well as acting as transport channels to enhance electron mobility. Single junction ternary devices incorporating 10 wt% IDMIC-4F exhibit enhanced light absorption and balanced carrier mobility, and achieve a maximum PCE of 16.6% compared to 15.7% for the binary device, which is a remarkable efficiency for OSCs reported in literature. This non-fullerene acceptor fibril network strategy is a promising method to improve the photovoltaic performance of ternary OSCs.

优化有机太阳能电池（OSC）的光敏层内的成分和形态可以显着提高其功率转换效率（PCE）。在这项工作中设计并合成了一种新的ADA型非富勒烯受体IDMIC-4F，它被用作制备高性能三元太阳能电池的第三种成分。IDMIC-4F可以在溶液流延后形成原纤维，而PBDB-T-2F：BTP-4F主体中这种原纤维结构的存在将供体和受体的生长限制在细微区域内，并充当增强电子的传输通道流动性。结合了10 wt％IDMIC-4F的单结三元器件具有增强的光吸收能力和平衡的载流子迁移率，并且最大PCE为16.6％，而二元器件为15.7％，对于文献报道的OSC，这是一个了不起的效率。这种非富勒烯受体原纤维网络策略是提高三元OSC光伏性能的一种有前途的方法。