Photocurrent spectroscopy of ion-implanted organic thin film transistors

► Photocurrent (PC) spectroscopy of pentacene thin films and thin film transistors (OTFT) of different thicknesses. ► PC spectroscopy identifies the film active thickness range through the distribution density of electrically active states. ► Effects of ion implantation on organic thin film transistors. ► Non-invasive, direct study of the active semiconductor film in fully operational OTFTs.