Abstract
A series of barium magnesium silicate (BMS) - based phosphors doped with different concentrations of Dy3+ is synthesized by using conventional solid-state reaction technique (SSRT). The prepared phosphors are characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDX) analysis, fourier transform infrared (FTIR) spectra, photoluminescence (PL) and thermoluminescence (TL). X-ray diffraction analysis confirms the formation of BaMgSiO4 with hexagonal structure. The excitation spectrum signifies strong 4f–4f transition in the wavelength range from 300 nm to 400 nm. The emission spectra indicate the possibility of excitation of samples by UV light (384 nm) and show strong emission band centered at 577 nm. Analysis of the emission spectra with different Dy3+ concentrations leads to the conclusion that the optimum dopant concentration for prepared BMS phosphors is 0.01 of Dy3+. TL kinetic parameters of the prepared phosphors are estimated using peak shape method. The CIE chromatic coordinates indicate the suitability of BMS phosphor for solid state lighting.
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