Luminescent properties of YVO 4:Dy 3+ phosphors prepared by spray pyrolysis

Abstract

Starting from nitrate aqueous solutions with citrate acid and polyethylene glycol (PEG) as additives, YVO 4:Dy 3+ phosphors were prepared by a two-step spray pyrolysis (SP). The obtained phosphors had spherical morphology. The luminescence properties of YVO 4:Dy 3+ phosphors were investigated by changing the concentration of Dy 3+ and the annealing temperatures, respectively. The emission intensity of the phosphors increased with increasing the annealing temperature due to the increase of the crystallinity and particles size. The optimum concentration for the luminescence of Dy 3+ was determined to be 2 mol% of Y 3+ in YVO 4 host.