Preparation And Luminsecent Property Of Y₂O₃:Eu³⁺ And YPO₄:Eu³⁺ Phosphors

Y2O3:Eu3+and YPO4:Eu3+fluorescent materials with different structures, sizes and morphologies were successfully synthesized through the combination of solvothermal method and high temperature calcination. The structure and morphology of the material were characterized by powder X-ray diffraction (XRD), infrared absorption spectroscopy (IR), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and energy dispersive X-ray spectroscopy (EDX). The fluorescent properties were measured by photoluminescence spectroscopy (PL). The fluorescent mechanism for the obtained materials was analyzed and discussed in detail. The reason that leads to the change of the fluorescent intensity and lifetime was explained in terms of the crystal field environment of the activator ions.The detailed content is as follows:Y2O3:Eu3+was obtained through the combination of solvothermal method and high temperature calcinations. The effects of different reaction conditions, such as the pH value, the time and temperature for solvothermal and calcination, and the amount of the surfactant, on the structures and fluorescent properties of the materials were investigated. A series of Y2O3:Eu3+fluorescent materials with different structures, sizes and morphologies were obtained through the optimization of the solvothermal reaction conditions and the calcination time and temperature. The as-synthesized Y2O3:Eu3+hollow spheres have an intense emission of red light and are expected to be used as a low-cost red phosphors.In addition, tetragonal and hexagonal YPO4:Eu3+rod, sheet and feathery structures were synthesized by choosing different kinds of phosphate and combining the solvothermal method and high temperature calcination. The control over the structures, morphologies and fluorescent properties of YPO4:Eu3+materials was realized by optimizing the solvothermal reaction conditions, such as the pH value, the reaction time and temperature, and the different phosphate salts. The effects of the reaction conditions on the structures and morphologies of YPO4:Eu3+fluorescent materials were discussed, and the influences of structures and morphologies of YPO4:Eu3+on the fluorescent properties and lifetime were investigated.