Photoluminescence of Rare Earth Phosphors Na_0.5Gd_0.5WO₄: RE3+ and Na_0.5Gd_0.5(Mo_0.75W_0.25)O₄: RE3+ (RE=Eu, Sm, Dy)

摘要

Two series of phosphors, Na_0.5Gd_0.5WO₄: RE3+ and Na_0.5Gd_0.5(Mo_0.75W_0.25)O₄: RE3+ (RE = Eu, Sm, Dy) have been synthesized by hydrothermal process to obtain the high purity, which have been characterized by X-ray powder diffraction (XRD), scanning electron microscope (SEM). The results suggest that Na_0.5Gd_0.5(Mo_0.75W_0.25)O₄: RE3+ phosphors are more easily to crystallize than Na_0.5Gd_0.5WO₄: RE3+ ones. Both of them present the characteristic luminescence of Eu3+, Sm3+ and Dy3+. Especially the photoluminescent properties of Na_0.5Gd_0.5WO₄: x%Eu3+ (Sm3+) can be obtained to show white luminescence as the suitable doping concentration of Eu3+ or Sm3+.