Abstract
Yttrium tantalate (YTaO4), yttrium niobium-tantalate (YTaNbO4), yttrium niobate (YNbO4), europium and terbium activated yttrium tantalate (YTaO4:Eu, YTaO4:Tb) and europium activated yttrium niobate (YNbO4:Eu) phosphors were prepared by solid-state reaction, from a homogeneous mixture consisting of Y2O3, Eu2O3, Tb4O7, Ta2O5, Nb2O5 and Na2SO4 as flux. Photoluminescence (PL), thermally stimulated luminescence (TSL), X-ray diffraction (XRD) and scanning electron microscopy (SEM) of yttrium tantalate based phosphors are reported. In the present study TSL characteristics of these phosphors were first investigated and reported after exposure to beta, UV (311nm) and X-ray radiations.
► Some yttrium tantalate-based phosphors are perspective materials for optoelectronics. ► Phosphors samples were prepared by solid-state reaction route. ► The techniques such as XRD, SEM and luminescence are used for these phosphors. ► The paper presents the influence of activator concentration and PL characteristics. ► TSL characteristics of these phosphors were first investigated.