Effect of alkaline earth on decay time of Dy3+ doped in Li2O-B2O3 glasses using pulse X-ray excitation
| Autor: | Keerati Kirdsiri, J. Kaewkhao, Benchaphorn Damdee |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Quenching Alkaline earth metal Materials science Lithium borate Doping Analytical chemistry 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Ion chemistry.chemical_compound Molar volume chemistry Excited state 0103 physical sciences 0210 nano-technology Excitation |
| Zdroj: | Materials Today: Proceedings. 17:1837-1842 |
| ISSN: | 2214-7853 |
| DOI: | 10.1016/j.matpr.2019.06.221 |
| Popis: | Different types of alkaline earth lithium borate glasses doped with 0.5 mol% of Dy3+ ions in composition of 50Li2O:20MO:29.5B2O3:0.5Dy2O3 (where MO = MgO, CaO, SrO and BaO) were prepared by normal melts quenching technique. The as-prepared glasses were characterized by the density, the optical transmission spectra, and together with decay time under X-ray pulse excitation. With increasing of the molecular weight of alkaline earth oxides the density of glasses increased and the same trend has been observed for the molar volume. The transmission spectra in the wavelength region of 350-2500 nm showed the f - f excitations for Dy3+ ions from ground states 6H15/2 to other excited states 6F5/2, 6F7/2, 6F9/2, 6H7/2, (6F11/2, 6H9/2) and 6H11/2. Moreover, a large increase in decay time under pulse X-ray excitation with the larger size of alkaline earth cation have been observed. |
| Databáze: | OpenAIRE |
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