Combining dithieno[3,2- f :2',3'- h ]quinoxaline-based terpolymer and ternary strategies enabling high-efficiency organic solar cells.

By incorporating a dithieno[3,2-:2',3'-]quinoxaline unit into a PM6 polymer backbone, we developed a novel terpolymer family, demonstrating composition-dependent optical, electrochemical, and morphological characteristics. Organic solar cells based on the combination of a terpolymer and ternary strategy achieved a high power conversion efficiency of 17.60%, demonstrating the validity of our combination strategy.