Structural, optical and physical properties of Dy3+ ions in barium sulphate borophosphate glasses for generation of white light

Glasses in the 25BaSO(4) - 30B(2)O(3) - (45 - x)P2O5 - xDy(2)O(3) system with x = 0.1, 0.3, 0.5, 0.7 and 1.0 mol% have been prepared by the melt quenching approach with the aim of using it for optical and white light application. The structural properties are examined by Fourier transform infrared and Raman spectroscopy. The amorphous state of the glasses matrices is determined by X-ray diffraction. Direct and indirect energy bandgap have been evaluated via the data found from UV-visible-near IR spectroscopy. The spectral absorption, emission and excitation are measured, and it is found that the glass doped Dy2O3 ions display good UV-excited luminescence of F-4(9/2)-> H-6(15/2) and F-4(9/2) -> H-6(13/2) transition around 480-500 and 570-600 nm corresponding to blue and yellow regions respectively. The physical parameters of the glasses have also been calculated. Infrared and Raman of the borosulfophosphate glasses revealed intense spectrum which is characterized by distinct bands.