| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1494208 | Optical Materials | 2014 | 9 Pages |
•Eu3+:Li–K–Zn fluorotellurite glasses were fabricated for laser applications.•Judd–Ofelt and radiative parameters were investigated.•Strong red emission occurred under blue light irradiation.•Phonon side band at the high energy side of the 5D2 level of Eu3+.•Single exponential and concentration independent decay curve.
Eu3+ ions incorporated Li–K–Zn fluorotellurite glasses, (70 − x)TeO2 + 10Li2O + 10K2O + 10ZnF2 + xEu2O3, (0 ⩽ x ⩽ 2 mol%) were prepared via melt quenching technique. Optical absorption from 7F0 and 7F1 levels of the Eu3+-doped glass has been studied to examine the covalent bonding characteristics, energy band gap and Judd–Ofelt intensity parameters. The emission spectra (5D0 → 7F0,1,2,3,4) of the glasses were used to estimate the luminescence enhancement, asymmetric environment in the vicinity of Eu3+ ions, stimulated emission cross section and branching ratios. The phonon side band mechanism of 5D2 level of the Eu3+ ions in the prepared glass was examined by considering the excitation and Raman spectra. The radiative lifetime calculated using Judd–Ofelt parameters was compared with the experimental lifetime to estimate the quantum efficiency of 5D0 level of Eu3+ ions in Li–K–Zn fluorotellurite glass.
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