A series of D-A₁-D-A₂ structured copolymers were synthesized by combining the simplest donor unit of thiophene (Th) and dual easily available acceptor units of alkoxylated benzoxadiazole (ROBO) and quinoxaline (ROQx). Short alkyl side chains were distributed over the dual acceptor units to dilute steric hindrance while guaranteeing solution processing of the polymers. The strong acceptor properties of benzoxadiazole (BO) could enhance the intramolecular charge transfer (ICT) interactions, while the weak acceptor of quinoxaline (Qx) may be used to strengthen π-π interactions through the favorable quinoidal structure form. Fixing Th and ROBO units, the effects of fluorination of the Qx unit were investigated. PSCs based on 3,9-bis(2-methylene-(3-(1,1-dicyanomethylene)-indanone))-5,5,11,11-tetrakis(4-hexylphenyl)-dithieno[2,3-d:2′,3′-d′]-s-indaceno[1,2-b:5,6-b′]dithiophene (ITIC) and PTBOQ-F exhibited a superior PCE of 5.84% due to the favorable hole mobility and blend morphology. In comparison, the separated D-A₁ and D-A₂ controls of PTBOQ-F afforded significantly lower PCEs (<1.45%). These results indicate that our approach is a feasible way to obtaining cost-effective polymers by screening the easily accessible moieties in a proper manner of dual acceptor units.

系列DA ₁ -DA ₂通过结合最简单的噻吩供体单元（Th）和烷氧基化苯并恶二唑（ROBO）和喹喔啉（ROQx）的两个容易获得的受体单元来合成结构化共聚物。短的烷基侧链分布在双受体单元上，以稀释空间位阻，同时保证聚合物的溶液加工。苯并二二唑（BO）的强受体特性可以增强分子内电荷转移（ICT）相互作用，而喹喔啉（Qx）的弱受体可以通过有利的醌型结构形式增强π-π相互作用。固定Th和ROBO单元，研究了Qx单元氟化的影响。基于3,9-双（2-亚甲基-（3-（1,1-二氰基亚甲基）-茚满酮））-5,5,11,11-四（4-己基苯基）-二硫代[2,3-d ：2′，3′-d′]- s-茚并[1,2-b：5,6-b']二噻吩（ITIC）和PTBOQ-F由于有利的空穴迁移率和共混物形态而显示出5.84％的优异PCE。相比之下，PTBOQ-F的分离的DA ₁和DA ₂对照提供了低得多的PCE（<1.45％）。这些结果表明，我们的方法是通过以双受体单元的适当方式筛选容易获得的部分来获得具有成本效益的聚合物的可行方法。