A Simple Solvothermal Synthesis of Spherical Y2O3:Eu3+
In this study, Y2O3 microspheres have been selectively prepared by solvothermal method, without using any template and catalyst carrier. Based on the systematic analysis of the samples, we have discussed the effects of the thermal treatment temperature on the structure of the Y2O3 microspheres. Besides, we have also investigated the effect of microstructure on the photoluminescence properties of the phosphor, and the impact of rare earth ion doping concentration on the emission intensity of the phosphor. Powder X-ray diffraction analysis of the powders confirmed the formation of cubic Y2O3. Scanning electron microscope observation reveals that the as-synthesized powders are spherical particles of diameter of approximately 3 μm at 180 °C. Photoluminescence measurements indicate that the phosphor exhibits strongest emission peak at 612 nm, corresponding to the 5D0-7F2 electric-dipole transition. In addition, highest luminescence efficiency was observed in the phosphor with the rare earth ion doping concentration of 5%.
M. Lv et al., "A Simple Solvothermal Synthesis of Spherical Y2O3:Eu3+", Advanced Materials Research, Vol. 1088, pp. 58-63, 2015