Used as an electron-deficient building block in organic semiconductors, particularly in the synthesis of non-fullerene acceptors for high-performance organic solar cells. Its fused dithiophene structure enhances charge transport and light absorption, contributing to improved power conversion efficiency. Commonly incorporated into donor-acceptor type polymers or small molecules for optoelectronic devices. Also explored in thin-film transistors due to its stability and planar molecular framework that promotes π-π stacking.