Optical properties of multicomponent borate glasses doped with trivalent terbium ions

The paper presents the results of studies of spectral and luminescent properties of new series glass multi compositions based on borate and bismuth glass heavily doped with terbium, and investigate the regularity of the characteristics of the obtained samples at different concentrations of bismuth and activator and the mutual effect on the borate glass matrix. It is shown that the intensity of spontaneous radiation increases with an increase in the concentration of terbium. Three main absorption bands were found due to fluctuations of complexes in borate glass. Characteristic absorption peaks of terbium ions at 367, 377 and 485 nm are observed, corresponding to the transitions 7F6→5D4, 7F6→5G6, 7F6→5L10. The physical parameters of a multicomponent glass doped with Tb3+ ions are calculated. The resulting phosphors have high photoluminescent properties and can be used in various optical applications.