Luminescence Properties of YVO4:Eu Phosphors Prepared Using a Y(OH)CO3:Eu Precursor

摘要

A new method to synthesize the YVO4:Eu phosphor by reacting a Y(OH)CO3:Eu precursor with NH4VO3 was described. X‐ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, thermogravimetric analysis, and photoluminescence spectroscopy were used to analyze the Y(OH)CO3:Eu precursor and the YVO4:Eu product. The photoluminescence spectrum of the YVO4:Eu product showed a strong and broad absorption peak at approximately 300?nm, which was attributed to charge transfer in the host lattice and the strongest and sharp emission peak at 618?nm due to the5D0→7F2 transition of the Eu3+ activator ion. To find the brightest emission of the YVO4:Eu phosphor, the optimal conditions of the concentration of Eu3+ activator ion in the Y1???xVO4:xEu composition and calcination temperature were examined. Among the investigated compositions, the Y0.92VO4:0.08Eu phosphor showed the brightest red emission under UV excitation.