Abstract
This paper reports, Sm3+-doped Sodium-Zinc-Borate glasses have been prepared by the melt-quenching method and the influence of samarium concentration on their structural, optical and spectroscopic properties. The findings of X-ray diffraction and Raman demonstrate that the glasses were non-crystalline and amorphous glassy nature. The optical findings show the non-linear variation of indirect energy band gap with Sm3+ concentration. Spectroscopic intensity parameters and radiative properties of Sm3+ ions were evaluated by performing Judd-Ofelt theoretical calculations. The emission cross-section (σem) of various transitions were calculated using Futchbauer-Ladenburgh theory by means of the radiative parameters. The decay curves exhibit non-exponential behavior after 0.5 mol % Sm3+ doping, which were analyzed using Inokuti-Hirayama model. Also, 45 % quantum efficiency was attained for 0.5 mol% Sm3+ doped glasses. From the investigated luminescence studies, 0.5 mol% of Sm3+ doped glass demonstrates the maximum emission intensity in the orange-red region as evidenced from the CIE colour coordinates diagram. The findings show that the prepared glasses are appropriate for orange-red emission applications.
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