(190r) Synthesis and Fluorescent Properties of YVO4:Eu Nanoparticle Prepared by Polymer-Assisted Chemical Solution Method

Inorganic luminescent materials have practical applications in many devices involving the artificial production of light. Recent work showed that nanosized yttrium orthovanadate doped with europium (YVO₄:Eu) has significant promise in plasma display panels. Here we prepared YVO₄:Eu nanoparticles using a chemical solution method with PEI and EDTA polymers binding with Y, V and Eu ions by varying reaction temperatures (500, 600, 700, and 800ºC) and EDTA/PEI ratio(1:4 to 4:1). The structure and morphologies of nanoparticles were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The photoluminescence properties were performed by fluorescence spectra. In addition, the Brunauer-Emmett-Teller (BET) surface area of YVO₄:Eu samples were estimated using N₂ adsorption data. Sheetlike structures formed by aggregated nanoparticles existed in wide range of temperature. Red shift from 300nm to 350nm was observed in the excitation spectra as temperature increased from 500 to 800ºC. By this method, the highest BET surface area of the nanoparticles was 35m²/g corresponding to the particle diameter of 20nm.