The performances of polymer solar cells (PSCs) have been greatly improved in recent years mainly ascribed to the development of various donor-acceptor (D-A) conjugated photovoltaic polymers. Among the different donor monomers used for building D-A conjugated photovoltaic polymers, indacenodithiophene (IDT) has attracted much attention due to its many advantages, like high hole mobility and easy structural modification. So far, a plenty of IDT-based polymers have been proved to deliver high power conversion efficiencies through rational molecular design. In this review, we focus on structural modification strategies on IDT monomer, including attaching various side chains and importing heteroatoms substituents, and photovoltaic properties of the resultant IDT-based D-A polymers with different acceptor monomers. We hope this review could provide an important guideline for the design of high performance IDT-based PSCs.

近年来，聚合物太阳能电池（PSC）的性能已得到很大改善，这主要归因于各种供体-受体（DA）共轭的光伏聚合物的发展。在用于构建DA共轭光伏聚合物的不同供体单体中，茚并二噻吩（IDT）由于其许多优点（如高空穴迁移率和易于结构修饰）而备受关注。迄今为止，已证明大量基于IDT的聚合物通过合理的分子设计可提供高功率转换效率。在这篇综述中，我们专注于IDT单体的结构修饰策略，包括连接各种侧链和导入杂原子取代基，以及所得IDT基DA聚合物与不同受体单体的光电性能。