Photodetectors for weak signal conditions from Au/Cu co-doped ZnO

Abstract

Here, we have used a simple method for polyol synthesis, analysis, and testing of Au/Cudoped ZnO Ultraviolet (UV) photodetectors (PD). Our results are reported and discussed by X-ray diffraction (XRD) to ensure that the manufactured samples show a hexagonal wurtzite ZnO structure. Transmission electron microscopy (TEM) confirmed the nanoparticle growth in the hexagonal sample on the surface, which is the key to improving the light response. Our prepared UV PD Au/Cu codoped ZnO showed a rapid time at a power density of 7.6 mW. the highest responsivity of R= 575 mA/W and sensitivity 10 3 obtained at 7.6 mW with an applied voltage of 1V. Our results demonstrate the obvious substitution of Au and Cu in ZnO, thereby improving the UV-sensing light response.