Tunable luminescence of Eu3+, Sm3+ and Dy3+ doped Na2CaMg(PO4)2 phosphor for optical applications

In this work Na2CaMg(PO4)(2) and Na2CaMg(PO4)(2-x)(SO4)(x) doped with europium, samarium and dysprosium phosphors were synthesized by combustion method using urea as a fuel along with its optical, structural and morphological investigations which may be applicable for solid state lighting and near-UV excited LED. The phase homogeneity of the phosphor was established by X-ray powder diffraction (XRD) and characterized by scanning electron microscopy (SEM), photoluminescent (PL) spectroscopy and room temperature FTIR spectrum. The photoluminescence (PL) properties were investigated under ultraviolet (UV) ray excitation. Preliminary studies showed that the phosphor might be promising candidate as a light-conversion phosphor for the optical system. The luminescence intensity is enhanced considerably by tuning the host matrices after core-shell formation due to degree of decrease of non-radiative rates rising from surface sagging bonds and surpassing agent. (C) 2019 Elsevier B.V. All rights reserved.