Used as a key intermediate in the synthesis of high-performance organic semiconductors, particularly in donor-acceptor copolymers for organic solar cells (OSCs). Its extended π-conjugated structure and alkoxy side chains enhance solubility and promote strong intermolecular stacking, improving charge carrier mobility. Commonly copolymerized with units like diketopyrrolopyrrole (DPP) or isoindigo to tune bandgap and optimize light absorption in photovoltaic devices. Also applied in organic field-effect transistors (OFETs) due to its favorable thin-film morphology and stability.