An in-depth study of the Judd-Ofelt analysis, spectroscopic properties and energy transfer of Dy3+ in alumino-lithium-telluroborate glasses

Abstract Dy 3+ -doped glasses with compositions of (69- x )B 2 O 3  + 10TeO 2  + 10Al 2 O 3  + 10Li 2 O +  x Dy 2 O 3 ( x  = 0.1; 0.5; 1.0 and 2.0 mol%) were prepared by a melt–quenching technique . An in-depth Judd-Ofelt analysis has been carried out to estimate the influence of the hypersensitive transitions (HST) of Dy 3+ on the validity of the obtained intensity parameters Ω λ (λ = 2, 4, 6). The thermalization effect of the three-levels system of 6 H 13/2 (level 0), 4 F 9/2 (level 1) and 4 I 15/2 (level 2) was taken into account to evaluate its radiative transition probabilities, life times and energy levels. The obtained results were compared with the experimental data to estimate the validity of the Judd-Ofelt analysis. The Inokuti-Hirayama model was used to analyze the luminescence decay curves. The dipole-dipole interaction was shown to be the dominant mechanism in energy transfer process through cross-relaxation between Dy 3+ ions. The possibility to produce the light with chromaticity coordinates in the white-light region by mixing intense blue (484 nm, 4 F 9/2  →  6 H 15/2 ) and yellow (575 nm, 4 F 9/2  →  6 H 13/2 ) emissions of the single Dy 3+ doped alumino-lithium-telluroborate glass was observed and estimated.