Hydrothermal growth and their optoelectronic device application of CuI nanostructure

Abstract

Cuprous iodide (CuI) was grown on the Si (100) and Cu films/Si(100) substrate by hydrothermal methods. Different nanostructured CuI have been obtained using hydrothermal reaction and hydrothermal evaporation methods. It has been found that all the nanostructured CuI films have a γ phase with polycrystalline structure. Having analyzed the photoluminescence (PL) character of nanostructured CuI, the origin of different PL emissions and the different growth mechanisms have been discussed. Then, the photoelectric properties of n-ZnO/p-CuI photodetector with UV light illumination under a different reverse bias have been investigated. Based on the current-voltage curve, the photocurrent to dark current ratio is approximately 80.8 at −3 V.