Used as a high-performance dopant in organic semiconductor materials, particularly in p-type doping applications for organic thin-film transistors (OTFTs) and organic photovoltaics (OPVs). Enhances charge carrier mobility by increasing the density of free holes in the semiconductor layer. Shows excellent stability and solubility in common organic solvents, enabling uniform film formation via solution processing. Its strong electron-accepting nature due to brominated cyclopentadithiophene core improves conductivity in conjugated polymers. Also employed in perovskite solar cells to modify hole transport layers, boosting device efficiency and operational stability.