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The gadolinium tungsten calcium silicon borate glasses doped with Tb3+ were prepared using the melt quenching technique to study physical, absorption and luminescence properties. The results show that doping with Tb2O3 in high concentration makes the glass density tendency to increase. The absorption spectra indicate the photon absorption of Tb3+ in the visible and near infrared ranges. The emission spectra of these glasses have been recorded under 275 nm (Gd3+) and 377 nm (Tb3+) excitation wavelengths, and it is has been observed that these glasses show bright green emission. From the emission spectra, Tb3+ doped glasses perform the strongest emission with the wavelength 544 nm. The optimum concentration of Tb3+ with the strongest emission in Gd2O3–WO3–CaO–SiO2–B2O3 is 1.50 mol.%. CIE 1931 chromaticity investigation shows that Tb3+ doped glasses emit the light with yellowish green color. Tb3+-doped glasses have the interesting potential to further development for using as laser medium in yellowish green solid-state lasers.

Gadolinium sodium silicoborate glasses doped with samarium ion (Sm:GNSB) are prepared by the melt quenching technique. The glasses are studied for their physical, optical, and luminescence properties. The density, molar volume, and refractive index of glass are investigated as a function of Sm2O3 concentrations. Addition of Sm3+ ions in the glass matrix shows several absorption peaks in the visible and near-infrared region, verified by the absorption spectra. The energy transfer from Gd3+ to Sm3+ is observed by photoluminescence (PL) emission spectra, which illustrates the strongest emission occurring at 600 nm (4G5/2→6H7/2). The PL decay time of 600 nm emission under 403 nm excitation decreases with increasing Sm2O3 concentrations. The color coordinates of the International Commission on Illumination chromaticity show different shades of orange color under different excitations. The result of radioluminescence shows a similar trend to PL emission spectra. Glasses doped with Sm3+ ions find potential use as an orange color-emitting optoelectronic device application. [ABSTRACT FROM AUTHOR]