Development of radiation sensor based on Pt/ZnO Schottky diode

We have fabricated the Pt/ZnO Schottky diode based on the single crystal substrate grown by the hydrothermal growth method. The output signals from the diode were analyzed for the incidence of x-rays and α-rays, and the clear responses for those radiations were observed. We have demonstrated a potential of the ZnO based device for ionizing radiations. In addition, we investigated the radiation hardness of the ZnO material irradiating the diode sample with the high energy proton beam. The electrical characteristics have not been significantly changed even after irradiation of 1015 protons/cm2.