Used primarily as a monomer in the synthesis of conductive polymers, especially poly(2-decylthiophene) and its derivatives. These polymers are key materials in organic electronics, including organic field-effect transistors (OFETs), organic photovoltaics (OPVs), and flexible displays. The long alkyl chain enhances solubility in organic solvents, facilitating solution processing techniques like spin coating and inkjet printing. Its structural compatibility allows for good π-π stacking, contributing to improved charge carrier mobility. Also explored in sensors and printed electronics due to its stability and tunable electronic properties.