Research on Fluorescence of ZnO Film on ZnWO₄ Crystal Substrates

ZnO thin films of high optical quality are prepared on single crystal substrates by sol-gel technique, and zinc acetate is used as precursor in this process.The feasibility of ZnWO₄ crystal used as a substrate material was analyzed and proved by theory and experiment.The results of experiment show that lattice between ZnWO₄ a-plane and ZnO c-plane closely matches,while the mismatch of the optimum orientation lattice is only 0.83%,and the ZnWO₄ crystal wafers can be used as a fine substrate material for forming ZnO film.The strong fluorescence of the thin film is observed at 396nm when it is excited by 325nm wavelength light.