Effects of AZO Seed Layer on the Growth and UV Photoconductive Properties of ZnO Nanowires

ZnO nanowires are fabricated on substrate coated with AZO thin film in Zn(NO3)2/C6H12N4 mixture using solution chemical method. AZO films are prepared by radiofrequency (RF) magnetron sputter deposition with different sputtering time and substrate temperature to change the growth state of the film. The effects of the states of the films on the morphology and structure of ZnO nanowires are focused, and the results show that, sputtering for 2 hours at substrate temperature of 250℃, well-ligned ZnO nanowires oriented perpendicular to the substrate are synthesized. Based on the previous research, UV photoconductive properties of ZnO nanowires with different morphologies are investigated. The results show that because of the different areas exposed to UV irradiation, the vertically aligned nanowire arrays respond faster than the lodging ones.