Synthesis Structural and Optical Studies on Composition Dependent Dy3+ doped Fluoroborate Glasses

Abstract

The Dy3+ ions doped fluoroborate glasses with composition 39B2O3 + 20ZnO + 20NaF + 20XCO3 + 1Dy2O3 in mol% (where X = Li2, Mg) have been prepared by melt quenching technique and characterized through XRD, FTIR, absorption and luminescence spectral analysis. The XRD measurement was made to examine the amorphous nature of the prepared glasses. The stretching and bending vibrations of various functional groups have been investigated through FTIR spectra. The bonding parameters (β and δ) were calculated from the absorption spectra to understand the nature of bonding of chemical environment in the prepared glasses. The Judd-Oflet (JO) intensity parameters (Ωλ (λ=2,4,6)) were determined from the measured oscillator strength of various absorption bands in order to study the symmetry around the RE ion site and used to compute the radiative properties such as emission band position(λP) effective bandwidth (Δλeff), transition probability (A), stimulated emission cross-section (σEP) and branching ratios (βR). The emission spectra exhibit two emission bands 4F9/2→6H15/2 and 6H13/2 corresponding to nblue and yellow emission under 374 nm excitation. The emission intensities were calculated and compared with the reported literature.