Luminescence properties of Dy(3+) doped lithium zinc borosilicate glasses for photonic applications

Different concentrations of Dy(3+) ions doped lithium zinc borosilicate glasses of chemical composition (30-x) B(2)O(3) - 25 SiO(2) -10 Al(2)O(3) -30 LiF - 5 ZnO - x Dy(2)O(3) (x = 0, 0.1, 0.5, 1.0 and 2.0 mol%) were prepared by the melt quenching technique. The prepared glasses were investigated through X-ray diffraction, optical absorption, photoluminescence and decay measurements. Intensities of absorption bands expressed in terms of oscillator strengths (f) were used to determine the Judd-Ofelt (J-O) intensity parameters Ω(λ) (λ = 2, 4 and 6). The evaluated J-O parameters were used to determine the radiative parameters such as transition probabilities (A(R)), total transition probability rate (A(T)), radiative lifetime (τ(R)) and branching ratios (β(R)) for the excited (4)F(9/2) level of Dy(3+) ions. The chromaticity coordinates determined from the emission spectra were found to be located in the white light region of CIE chromaticity diagram.