Used as an organic semiconductor in organic photovoltaic (OPV) cells, particularly as an electron acceptor in bulk heterojunction solar cells. Its structure enables strong light absorption and efficient charge transfer when paired with donor polymers. Commonly employed in research to improve power conversion efficiency due to its tunable energy levels and good thermal stability. Also utilized in organic field-effect transistors (OFETs) and perovskite solar cells as a hole transport material or interfacial layer. Its brominated thiophene units enhance intermolecular interactions, supporting better charge carrier mobility.