ABSTRACT The pursuit of efficient and environmentally benign synthetic routes for electron acceptors via is vital to advancing the commercialization of organic solar cells (OSCs). In this study, we leverage a direct C–H arylation strategy to synthesis a novel A‐D‐π‐D‐A‐type acceptor ( D1 ), which offers significant advantages in step and atom economy, along with a reduced environmental impact compared to conventional cross‐coupling methods. When combined with the polymer donor PM6, the optimized PM6:D1 binary devices attained a power conversion efficiency (PCE) of 9.85%. Furthermore, capitalizing on the well‐aligned energy levels and complementary absorption with the benchmark blend PM6:Y6, D1 was successfully incorporated as a third component to fabricate ternary OSCs. The resulting PM6:Y6:D1 devices exhibited more balanced charge transport, enhanced exciton dissociation, and improved photovoltaic parameters, yielding a champion PCE of 16.58%. This work highlights the considerable potential of C–H arylation as a green synthesis method for constructing high‐performance acceptors and offers key insights for designing efficient multi‐component organic photovoltaic systems.
Peng et al. (Thu,) studied this question.