Luminescence properties YVO4 powders doped with dysprosium and alkaline-earth metals

Abstract

YVO4:Dy and YVO4:Dy,M (M = Mg, Ca, Sr, Ba) powders were prepared by sintering at 900°C. According to XRD patterns, all samples are well crystallized, single-phase YVO4. SEM showed that the morphology of the samples did not show apparent changes. Under 275 nm excitation, the strongest emission line is observed at 576.6 nm, corresponding to the transition from 4 F 9/2–6 H 13/2 level of Dy3+ ion. The yellow/blue (Y/B) intensity ratio 4 F 9/2–6 H 13/2 to 4 F 9/2–6 H 15/2 values of Dy3+ for the phosphors doped with different divalent alkaline-earth metal ions is changes slightly. For the YVO4:Dy3+ particles, this value is maximal, which indicates that the color of the with YVO4:Dy3+ samples is the most pure.