Energy Transfer Studies in Dy3+ Ions Doped Aluminium Telluroborate Glasses

Abstract

Dy3+ ions doped aluminium telluroborate glasses were prepared following the melt-quenching technique by varying the Dy3+ ions concentration with respect to borate content. The optical behavior of the title glasses was explored by recording absorption and luminescence spectra. The ionic or covalent nature was determined from the energy positions observed in the absorption spectra using Nephelauxetic ratios. The Yellow/Blue ratio was calculated from the luminescence spectra to determine the degree of asymmetry in the prepared glasses. The luminescence intensity is found to quench beyond 1.0 wt% of Dy3+ ions doped aluminium telluroborate glass which may be due to the resonance energy transfer or cross-relaxation phenomena takes place and is analyzed with Inokuti-Hirayama model.