Optical and morphologic properties of YVO4:Eu phosphor

In this paper we present new results concerning the optical and morphologic properties of YVO 4 :Eu red nanophosphor prepared by a precipitation method and subsequently annealed in air at various temperatures. We monitored the morphologic changes induced by the thermal treatments using the optical spectroscopy (reflectance and luminescence spectra), XRD and electron microscopy. The annealing leads to an increase of the particle size and improvement of the order of the crystalline lattice of YVO 4 . The annealing at 800°C produces the sample with the highest luminescence intensity.