Determination of spectroscopic parameters and thermoluminescence studies of Dy3+-activated Ba2ZnSi2O7 phosphor

The presented study deals with white light emission from Dy3+-activated Ba2ZnSi2O7 phosphors with a variable concentration of the dopant (0.1–2.5 mol.%). Ba2ZnSi2O7:Dy3+ phosphors are prepared using the modified solid-state synthesis method. The structural analysis of phosphors was conducted using the powder X-ray diffraction analysis (XRD), and refined parameters were calculated using the match software. Morphology and particle size were analysed using transmission electron microscopy (TEM) and scanning electron microscopy (SEM). Intense white light emission with the Commission Internationale de I'Eclairage (CIE) chromaticity coordinates (0.30, 0.33) was achieved for an optimal doping concentration of 1.5 mol.%. Highest emission intensity was obtained for the 487, 544 and 594-nm emission, indicating its potential applicability in the fields of lighting and displays. Thermoluminescence (TL) glow curves are composite in nature and a broad band, found at 300°C, was deconvoluted by the computerized glow curve deconvolution program to calculate its kinetic parameters. The glow curve intensity increases upon increasing the UV exposure time. This study is useful in detecting trap parameters and TL dosimeters.