فهرست نشریات علمی دسترسی آزاد ایران

Radial CuO/ZnO p-n heterojunctions have been successfully fabricated on Si and glass substrate. The vertically aligned ZnO nanostructures are formed at 75⁰C temperature using a hot water treatment technique for deposition times of (10, 20, 30) min. Using the hydrothermal method, on ZnO nanorods, high density CuO nanostructures were produced. The investigation focused on the p-n nanostructured junction’s optical, structural, and morphological characteristics. The XRD results show that the constitutive layers show high crystalline quality. The FESEM images revealed a porous surface texture of the constructed CuO/ZnO heterojunction and become more densely packed at 30 min deposition times of ZnO. The results of the optical properties show that as the ZnO deposition time increases, the absorption spectra of the as-prepared CuO/ZnO moves from the UV region to the visible area. The optical energy gap values tend to decrease with increasing ZnO thin film’s deposition time. The photoelectrical properties of the CuO/ZnO/Si junctions were investigated through current–voltage characteristics. Results demonstrated that the radial p-CuO–n-ZnO nanostructured junction has a good photocurrent response and recovery times due to high surface-to-volume ratio and efficient electron transport which reveal their suitability for low cost photodetector devices.