Used as a high-performance donor polymer in organic solar cells, PBDB-T-2F enables efficient light absorption and charge transport when paired with non-fullerene acceptors. It is widely applied in polymer:acceptor bulk heterojunction photovoltaic devices, contributing to power conversion efficiencies exceeding 15% due to its optimized energy levels and strong intermolecular packing. Its fluorinated structure enhances open-circuit voltage and overall device stability, making it a key material in research on flexible and lightweight organic photovoltaics.