Recent Advances of Benzodithiophene‐Based Donor Materials for Organic Solar Cells

Recently, the power conversion efficiency (PCE) of organic solar cells (OSCs) has increased dramatically, making a big step toward the industrial application of OSCs. Among numerous OSCs, benzodithiophene (BDT)‐based OSCs stand out in achieving efficient PCE. Notably, single‐junction OSCs using BDT‐based polymers as donor materials have completed a PCE of over 19%, indicating a dramatic potential for preparing high‐performance large‐scale OSCs. This paper reviews the recent progress of OSCs based on BDT polymer donor materials (PDMs). The development of BDT‐based OSCs is concisely summarized. Meanwhile, the relationship between the structure of PDMs and the performance of OSCs is further described in this review. Besides, the development and prospect of single junction OSCs are also discussed. Among numerous organic solar cells (OSCs), benzodithiophene (BDT)‐based OSCs exhibit dramatic potential and achieve excellent power conversion efficiency of over 19%. This paper has systematically reviewed the research progress of OSCs based on BDT and may provide some guidance for further enhancing the OSCs based on BDT.