A new π-conjugated building block containing bis-dicyanovinylidene as an end-capping group has been explored for the development of n-type organic semiconductors. This building block can be easily obtained from commercialized 2,3-thiophenedicarboxaldehyde and introduced into a π-conjugated system in high-yield. By using indaceno[1,2-b:5,6-b']dithiophene (IDT) as the core moiety, an A-π-D-π-A molecule with up to 8 cyano-groups (DH8CN) was firstly synthesized and employed as an electron-accepting material in bulk-heterojunction organic solar cells. Preliminary organic cell fabrication gave a 1.1% power conversion efficiency with PTB7-Th and DH8CN as active layer, show the potential of this bis-dicyanovinylidene group in organic photovoltaics.

为了开发n型有机半导体，已经探索了一种新的包含双二氰基亚乙烯基作为端基的π共轭结构单元。该结构单元可以容易地从商业化的2，3-噻吩二甲醛中获得，并以高收率引入到π-共轭体系中。以吲哚并[1,2-b：5,6-b']二噻吩（IDT）为核心部分，首先合成了具有最多8个氰基的A-π-D-π-A分子（DH8CN）。并用作体异质结有机太阳能电池中的电子接受材料。初步的有机电池制造以PTB7-Th和DH8CN为活性层给出了1.1％的功率转换效率，显示了这种双-二氰基亚乙烯基在有机光伏中的潜力。