In this work, the synthesis of a novel star-shaped donor-acceptor molecule I with acridine-based core being a fused derivative of triphenylamine linked through π-conjugated terthiophene spacers and terminal hexyldicyanovinyl electron-withdrawing units is reported. Its physicochemical and photovoltaic properties were comprehensively studied and compared to those of molecule II being a structural analog but with a pristine propeller-like triphenylamine core. The novel molecule shows combination of the higher crystallinity, solubility and thermal stability. As compared to II, bulk heterojunction organic solar cells based on I as a donor and PC₇₁BM as an acceptor showed the three times higher hole mobility, 50% larger external quantum efficiency, which resulted in up to twice higher power conversion efficiency reaching 6.14%. This work demonstrates that the triphenylamine core fused by p-tolylmethylene groups in the star-shaped donor acceptor molecules is a promising building block to design highly soluble and crystalline materials for organic optoelectronic devices.

在这项工作中，报告了一种新颖的星形供体-受体分子I的合成，该分子具有a啶基核，该核是通过π-共轭对噻吩间隔基和末端己基二氰基乙烯基吸电子单元连接的三苯胺的稠合衍生物。对它的物理化学和光电性质进行了全面的研究，并将其与结构类似但具有原始螺旋桨状三苯胺核心的分子II进行了比较。该新型分子显示出较高的结晶度，溶解度和热稳定性的组合。与II相比，基于I作为施主和PC _71的体异质结有机太阳能电池BM作为受体显示出高出三倍的空穴迁移率，高50％的外部量子效率，这导致功率转换效率提高了两倍，达到6.14％。这项工作表明，在星形供体受体分子中被对甲苯基亚甲基稠合的三苯胺核是设计用于有机光电器件的高可溶性和结晶性材料的有前途的基础。