Holmium doped Lead Tungsten Tellurite glasses for green luminescent applications

摘要: Abstract Lead Tungsten Tellurite (LTT) glasses doped with different concentrations of Ho 3+ ions have been synthesized using the melt quenching method and characterized to understand their visible emission characteristic features optical absorption photoluminescence spectral studies. The Judd–Ofelt (JO) parameters measured from were used evaluate radiative properties such as transition probability ( A R ), branching ratio β ) lifetimes τ for prominent fluorescent levels in LTT glasses. spectra recorded all at an excitation wavelength 452 nm gives three transitions 5 F 4 → I 8 , 7 which observed green region (546 nm) is relatively more intense than other two transitions. intensity these increases up 1 mol% beyond concentration observed. Branching ratios cross-sections σ se evaluated luminescence efficiency (546 nm). CIE chromaticity coordinates also order suitability luminescence. From coordinates, it was found that are most suitable principle.