Luminescence studies on Ba2MgSi2O7 doped with Eu2+ and Tm3+ phosphors (original) (raw)

Journal of Display Technology, 2016

Abstract

Di-barium magnesium silicate doped with Eu 2+^{2+}2+ and Tm 3+^{3+}3+ phosphors were prepared for different concentrations of Tm 3+^{3+}3+ ions keeping the concentration of Eu 2+^{2+}2+ as 0.5 mol%. Photoluminescence (PL) studies of prepared samples were carried out. Emission spectra exhibited optimum green color emission at 509 nm when Tm 3+^{3+}3+ was 1.5 mol%. Emission is expected to arise due to the transition of Eu 2+^{2+}2+ ions from any of the sublevels of 4d 6^{6}6 5f 1^{1}1 to its ground state ( 8{}^{8}8 S 7/2)_{7/2})7/2) . This sample with 1.5 mol% of Tm 3+^{3+}3+ is taken for X-ray diffraction analysis. XRD pattern confirmed that the sample follows monoclinic structure with C 1 2/c 1 (15) space group. Scanning Electron Microscope image of the sample exhibited the uniform morphology with average particle size of 222.54 mu\mumu m . Thermoluminescence (TL) glow curves of the sample for different UV irradiation were also recorded which presented single broaden peak centered at about hbox91circ{\hbox{91}}\ ^{\circ}hbox91circ C. Phosphorescence decay curve was indicative of presence of dual exponential decaying section with a fast decay followed by a long decaying part.

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