Development of n-type polymer semiconductor materials for all-polymer solar cells (all-PSCs) receives increasingly attention. A series of new n-type random terpolymers with identical perylene diimide-thiophene alternating copolymer backbone and different composition of the side chains 2-octyldodecanyl and 2-ethylhexanyl have been designed and applied as the acceptor materials in all-PSCs. The all-PSCs based on bulk heterojunction blends with side-chain engineered random terpolymer P(1/1) as acceptor and PTB7-Th as donor give a high power conversion efficiency value of 6.18% with an open-circuit voltage of 0.74 V, a short-circuit current density of 14.71 mA cm⁻², and a fill factor of 0.57. The results demonstrate that design of the poly(perylenediimide-alt-thiophene) random terpolymer acceptors via side-chain engineering is an alternative strategy for obtaining high-performance photovoltaic acceptor materials.

用于全聚合物太阳能电池（all-PSC）的n型聚合物半导体材料的开发越来越受到关注。设计了一系列具有相同n二酰亚胺-噻吩交替共聚物主链和侧链2-辛基十二烷基和2-乙基己基组成不同的新型n型无规三元共聚物，并将其用作全PSC的受体材料。基于本体异质结共混物，侧链工程无规三元共聚物P（1/1）作为受体，PTB7-Th作为施主的全PSC在开路电压为0.74 V的情况下提供了6.18％的高功率转换效率值，短路电流密度为14.71 mA cm ^-2，填充系数为0.57。结果表明聚该设计（perylenediimide- ALT-噻吩）通过侧链工程设计的无规三元共聚物受体是获得高性能光伏受体材料的另一种策略。