Studying the properties of Gd2O3-WO3-CaO-SiO2-B2O3 glasses doped with Tb3+

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.