Abstract
The Dy3+-doped fluoroborate glasses with the composition (40-x)B2O3+20ZnO+20MgCO3+20NaF+xDy2O3 (where x = 0.1, 0.3 and 1.0) have been prepared by conventional melt quenching technique. The bonding parameter and oscillator strength for the prepared glasses have been calculated using the optical absorption spectra. Judd–Ofelt (JO) intensity parameters (Ωλ, λ = 2,4,6) have also been evaluated using optical absorption spectra. The radiative properties such as radiative transition probabilities (A), stimulated emission cross-section (σPE), lifetime (τR) and branching ratios (βR) have been calculated from luminescence spectra corresponding to 4F9/2→6H13/2 and 6H15/2 of excited levels of Dy3+ion. The CIE chromaticity color coordinates were evaluated from the emission spectra for all the glasses and found that they fall in the white light region. The dependence of spectral characteristic of Dy3+ ions due to concentration changes have been investigated and reported. The study concludes that the Dy3+ doped fluoroborate glasses are attractive material for white light applications.
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