A novel nonfullerene small‐molecular acceptor indacenodithiophene (IDT)‐4CN is designed and synthesized with IDT as the core and benzothiadiazole and dicyanoethxylrhodanine as end‐capping groups. Multiple noncovalent conformational locks N…S, CH…O, and CH…N are introduced into the backbone, resulting in a highly planar molecular acceptor. As a result, the IDT‐4CN‐based organic solar cells exhibit a power conversion efficiency of 8.13%, which is much higher than that of PC₇₁BM‐based devices (6.19%). A novel method is thus demonstrated to construct highly planar molecular acceptors for organic solar cells.

中文翻译：

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具有多个非共价构象锁的高度平面非富勒烯受体，用于高效有机太阳能电池

设计并合成了一种新型的非富勒烯小分子受体茚并二噻吩（IDT）-4CN，以IDT为核心，苯并噻二唑和二氰基乙基罗丹宁为封端基团。多个非共价构象锁N…S，CH …O和CH …N引入主链，形成高度平面的分子受体。结果，基于IDT-4CN的有机太阳能电池的功率转换效率为8.13％，远高于基于PC ₇₁ BM的设备的转换效率（6.19％）。因此证明了一种新颖的方法来构造用于有机太阳能电池的高度平面的分子受体。