Effect of transition metal Mn2+ ion doping on the structural, spectral and photoluminescent properties of NaSrVO4 prepared by combustion synthesis

Abstract

The paper presents a simplistic way to synthesize NaSr(1−x)VO4:xMn2+ nanophosphors with 0.25 ≤ x ≤ 3.0 mol% by using combustion synthesis route in which urea is used as an organic fuel. The structural, spectral and optical properties were examined using XRD, UV–Vis spectroscopy, Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM) and Photoluminescence (PL) spectroscopy. Doping the host with Mn2+ ions created the mid gap absorption phenomenon. Initially, a red shift is observed in the band gap for low amount of the transition metal ion Mn2+ in NaSrVO4 host which is followed by an augment in the band gap values for higher concentrations. Photoluminescence properties shows that under excitation at 380 nm, sample possess two prominent emissions peaking at 434 nm and 523 nm. This phosphor material may possibly be considered of as a new material to be excited by UVA emitting InGaN LEDs. © 2021 Elsevier B.V.