Abstract
Terbium doped glasses with three different compositions from the system CaO-GeO2-Li2O-B2O3 and different dopant concentrations were prepared. DTA analyses show weak influence of the rare earth ion on the glass thermal properties. The FTIR spectra revealed variations between glass structures. Excitation and emission spectra of the doped glasses possess the characteristic transitions of Tb3+ ions. Peaks locations are not dependent on the rare earth ion concentration and the glass composition, but some splitting appears. Chromaticity coordinates of Tb3+ glasses are placed in a green and green-yellowish area of the color space diagram.
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