The photoluminescence, optical absorption and physical properties of Dy³⁺ ions in Li₂O-La₂O₃-B₂O₃ glass system

The lithium lanthanum borate glasses doped with Dy₂O₃ were prepared by the melt quenching technique. The Dy₂O₃ doped concentration has been increased and substituted B₂O₃ from 0. 00 to 1. 50 mol% in the glasses. The photoluminescence, optical absorption and physical properties of these glasses have been investigated in this work. The experimental results show that, the molar volume of glasses tended to increase with increasing of Dy₂O₃ concentration, but the density were not depending on the concentration of Dy₂O₃. The UV-Vis-NIR spectra, absorption bands at 451, 798, 894, 1085 1264 and 1676 nm have been observed. For Dy³⁺ doped glasses, emission bands centered at 483, 575 and 664 nm have been observed with 388 nm excitation wavelength. The emission spectra have shown the strongest band in the glasses with 0. 50 mol% Dy₂O₃ concentration.