DY3+ ION- DOPED ZINC BARIUM NIOBIUM BOROTELLURITE GLASSES: STRUCTURAL, OPTICAL, AND LUMINESCENCE INSIGHTS FOR WHITE LIGHT APPLICATIONS

Analysis and review of physical, structural, optical, and luminescence properties of dysprosium-doped zinc barium niobium boro-tellurite glass has been carried out. All glass samples were prepared by melting around 1.5 h at 1,150 degrees C and annealing around 3 h at 350 degrees C. Six different concentrations of Dy(2)O(3 )were used to prepare the glasses, ranging from 0.00 to 1.50 mol%. The samples were prepared, involving both shaping and refining, for density, refractive index, and optical/photoluminescence measurements at room temperature. Structural measurements were obtained using XRD, FTIR, and Raman spectroscopy. The absorption spectra demonstrate that the transition state of Dy(3+ )ion from H-6(15/2 )(ground state) to several excited states (P-6(7/2)), (F-4(7/2)+I-4(13/2)), (F-6(3/2)), (F-6(5/2)), (F-6(7/2)), (H-6(7/2)+F-6(9/2)), (H-6(9/2)+F-6(11/2)), and (H-6(11/2)) at wavelengths of 350, 394, 759, 804, 903, 1,094, 1,276 and1,681 nm, respectively. The sample was excited with a xenon flash lamp of 453 nm, which produces 3 emission peaks at 482, 574, and 661 nm associated with the transitions F-4(9/2 )-> H-6((11/2, 13/2, and 15/2)),in that order. The combination of blue light from energy level F-4(9/2)-> H-6(15/2) and yellow light from energy level F-4(9/2)->(6)H(13/2 )resulted in white light emission, as corroborated by the CIE 1931 chromaticity diagram. The Lifetime exhibits a diminishing trend as the concentration of Dy(2)O(3 )increases. According to the Judd Ofelt (JO) intensity values, the trend was Omega(2)> Omega(4) > Omega(6) observed. The radiative parameters utilized to assess the suitability of these glasses for laser operation in the visible range were the branching ratios (beta(R)), transition probabilities (A(R)), and stimulated emission cross-sections (sigma(e)) for the F-4(9/2 )-> (6)H(13/2 )transition. The current Dy(3+ )ion doped zinc barium niobium borotellurite glasses are thus suggested to be ideal for applications of white light andoptical devices.