Luminescence Studies on Ba$_{2}$MgSi$_{2}$O$_{7}$ Doped With Eu$^{2+}$ and Tm$^{3+}$ Phosphors

摘要

Di-barium magnesium silicate doped with Eu and Tm phosphors were prepared for different concentrations of Tm ions keeping the concentration of Eu 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 was 1.5 mol%. Emission is expected to arise due to the transition of Eu ions from any of the sublevels of 4d5f to its ground state (S. This sample with 1.5 mol% of Tm 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 m . Thermoluminescence (TL) glow curves of the sample for different UV irradiation were also recorded which presented single broaden peak centered at about C. Phosphorescence decay curve was indicative of presence of dual exponential decaying section with a fast decay followed by a long decaying par- .