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

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. Graphical Preparation and Luminescence Properties of YVO4:Eu Phosphors