Spectroscopic investigation of Dy₂O₃ doped B₂O₃-SiO₂-Na₂O-K₂O glass for W-LEDs and laser application

B₂O₃-SiO₂-Na₂O-K₂O-Dy₂O₃ glasses were prepared and study for their spectroscopic and physical properties in detail. The density of present BSNK glasses increases with an increase in Dy-ions concentration. Moreover, Dy-ion concentration (N) and field Strength also show an increasing trend. Absorption spectra exhibit eight characteristic peaks in Vis and NIR region. The trend in JO parameters is Ω₂ > Ω₆ > Ω₄ for the BSNKDy1.5 glass sample with a higher value of Ω₂. Six transitions are observed in the excitation spectra (300-500 range and λem=573 nm) of the BSNKDy samples. Emission cross section (σ_p(λ_p)) for ⁴F_9/2 → ⁶H_13/2 transition has the highest value among other transition of NSNKD1.5 glass. The quantum efficiency for BSNKDY1.5 glass is 55%. The CIE coordinates and CCT-value for BSNKDy glasses are (0.37, 0.41) and 4461 K, respectively. Hence, these are suitable for high-gain, continuous low-threshold laser action and W-LEDs. (author)