Used as an electron-accepting unit in organic semiconductors, particularly in the development of organic photovoltaic (OPV) materials. Its extended alkoxy side chains improve solubility and film-forming properties, enabling solution processing for thin-film devices. Commonly incorporated into conjugated polymers and small molecules for high-performance organic solar cells due to its strong electron-withdrawing nature and good charge transport characteristics. Also explored in organic field-effect transistors (OFETs) and fluorescent sensors owing to its tunable optical and electronic properties.