The effect of SiO2 dielectric layer on ultraviolet detecting properties of pentacene thin film transistor

▶ Electrical characteristics of the pentacene transistor subjected to a UV light excitation at a wavelength of 365 nm were analyzed. ▶ A significant increase in the drain current of the pentacene thin film transistor under a UV excitation of 365 nm is observed with a maximum photosensitivity of 4.51 in the depletion regime. ▶ It is evaluated that the pentacene thin film transistor can be used in UV photo-detecting devices.