Effect of TiO2 on Luminescent Properties of ZnO/ZnS:Eu3+ Phosphor

ZnO/ZnS/2TiO(2):Eu3+ phosphor was prepared by sol-gel-precipitation method. The structure, composition, morphology and luminescent properties were characterized by used X-ray diffraction (XRD), infrared spectroscopy (IR), transmission electron microscope (TEM) and fluorescence spectrum. The mechanism of luminescence was investigated. The results showed that phosphor changed into a stable structure when the temperature was above 600 degrees C, and structure of the irregular shape. The phosphor mainly composed of ZnO, TiO2 and ZnS. IR spectra show that the structure of Ti-O-Ti bridge oxygen bond network is conducive to pass energy among the Eu3+. Fluorescence spectra show that the addition of TiO2 can remove the inhibition of Eu3+ spectral melody and improve the luminescence properties of phosphor. And the best luminescence performance was obtained in the phosphor prepared with eta(Zn(NO3)2):eta(TiO2)=1:2. The strongest emission peak was D-5(0)-> F-7(2) electric dipole transition at 612 nm, and the optimum annealing temperature was 600 degrees C.