Used as a key building block in organic electronics, particularly in the synthesis of conjugated polymers and small molecules for organic photovoltaics (OPVs) and organic field-effect transistors (OFETs). Its rigid, linear structure enhances π-conjugation, improving charge carrier mobility and light absorption properties. The octyloxy side chains increase solubility in organic solvents, facilitating solution processing for thin-film device fabrication. Commonly employed in donor-acceptor type copolymers to tune energy levels and optimize device performance.