Archives of Metallurgy and Materials

Abstract

In this paper YVO 4 :Dy 3+ was synthesized via solid state method at 1100°C and effects of different quantities of SiO 2 particles on microstructure and photoluminescence properties were investigated in details. To study the microstructure and properties of these composites XRD, SEM, TEM, HRTEM, XPS and PL equipments were employed. It was found that via addition of SiO 2 particles to YVO 4 :Dy 3+ phosphors, strong bonding is made between SiO 2 particles and phosphors. Furthermore, based on stronger electronegativity of Si 2p element compared to Y 3d and V 2p elements, increase of SiO 2 causes the increase of binding energy. Moreover, this research showed that the addition of 10 wt% SiO 2 particles to YVO 4 :Dy 3+ material enhances the excitation and emission luminescence properties, significantly. Further increase of SiO 2 particles results in suppress of emission intensity.