Flexible pentacene organic thin film transistor circuits fabricated directly onto elastic silicone membranes

We have fabricated flexible pentacene thin film transistors (OTFTs) and active load inverter circuits directly onto polydimethylsiloxane (PDMS) membranes. Gold electrodes, parylene C gate dielectric, and pentacene films are deposited using a room temperature and all-vapor phase process on spin-coated or cast PDMS. The channel stack on PDMS is wrinkled but crack-free. The devices have good electrical properties with saturation mobilities up to 0.2cm2∕Vs, and on/off current ratio of 5×104. The OTFT circuits on PDMS withstand modest repeated bending without electrical failure.