Materials Research Bulletin, Vol.47, No.12, 4151-4155, 2012
VUV photoluminescence of (Y0.5Gd0.5)(0.94)VO4:Eu3+ red-emitting phosphors prepared by the solution combustion method
Spherical and nano-sized high-quality (Y0.5Gd0.5)(0.94)Eu0.06VO4 phosphor powders (27 nm in size) were synthesized by the solution combustion method. The microstructure and VUV photoluminescence properties of the (Y0.5Gd0.5)(0.94)Eu0.06VO4 were studied, depending on the annealing temperature. The mean sizes of the (Y0.5Gd0.5)(0.94)Eu0.06VO4 powders increased with an increase in the annealing temperature, i.e., 0.09, 0.95, 2.15, 3.6, and 4.4 mu m for 600, 800, 1000, 1100, and 1200 degrees C, respectively. The (Y0.5Gd0.5)(0.94)Eu0.06VO4 phosphors annealed at 1000 degrees C showed both the highest emission intensity and the highest ratio of the D-5(0) -> F-7(2) to the D-5(0) -> F-7(1) transition, indicating both the strongest and the purest red light emission. (C) 2012 Elsevier Ltd. All rights reserved.