Spectroscopic investigation and optical characterization of Eu3+ ions in K–Nb–Si glasses
| Autor: | C.K. Jayasankar, D. Ramachari, M. Murali Mohan, L. Rama Moorthy |
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| Rok vydání: | 2014 |
| Předmět: |
Potassium Compounds
Chemistry Niobium Analytical chemistry Color Oxides Silicon Dioxide Spectrum Analysis Raman Fluorescence Atomic and Molecular Physics and Optics Decay curve Analytical Chemistry Characterization (materials science) Ion Europium Melt quenching Cations Excited state Radiative transfer Glass Emission spectrum Absorption (chemistry) Instrumentation Spectroscopy |
| Zdroj: | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy. 118:966-971 |
| ISSN: | 1386-1425 |
| Popis: | This paper reports on the effect of concentration of Eu(3+) ions in K2O-Nb2O5-SiO2-Eu2O3 (KNbSiEu) glasses prepared by the melt quenching technique. By using the Judd-Ofelt (JO) theory, the intensity parameters Ωλ (λ=2, 4, 6) have been determined from the absorption and emission spectra of Eu(3+) ions under different constraints. The radiative properties of some of the excited states of Eu(3+) ions have been calculated. The decay curves of (5)D0 level exhibited single exponential for all the Eu(3+) ions concentrations. From these results, it is suggested that the strong red emission at 616 nm corresponding to the (5)D0→(7)F2 transition could be used for the development of optical display devices. |
| Databáze: | OpenAIRE |
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