Physical and optical properties of Dy3+ bismuth barium borate glasses

Abstract

Trivalent dysprosium (Dy3+) doped bismuth barium borate glasses with composition (40-x) B2O3:40Bi2O3:20BaO:xDy2O3 (where x = 0, 0.50, 1.00, 1.50, 2.00 and 2.50 mol.%) were prepared by melt quench technique at 1,100 oC. The density of the prepared samples was measured using Archimedes’ principle. The results show the increasing in the glass density with respect to increasing in the doping concentrations of Dy2O3. The molar volume of the bismuth barium borate glasses doped with Dy3+ were calculated and found to be in the range 30.63-30.95 cm3/mol. The analysis of FTIR spectrum of the sample depicts that the glass network is built up of mainly BiO3, BO3 and BO4 units. The UV visible absorption spectra of the dysprosium doped bismuth barium borate glasses were found to be consists of five absorption peaks which correspond to transitions from ground state 6H15/2 to various excited states.