Influence of MO/MF2 modifiers (M = Ca, Sr, Ba) on spectroscopic properties of Eu3+ ions in germanate and borate glasses
| Autor: | Joanna Janek, Ewa Pietrasik, Marta Sołtys, L. Zur, Wojciech A. Pisarski, Joanna Pisarska |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Analytical chemistry Mineralogy chemistry.chemical_element 02 engineering and technology 010402 general chemistry 01 natural sciences Ion Inorganic Chemistry Germanate Emission spectrum Electrical and Electronic Engineering Physical and Theoretical Chemistry Boron Spectroscopy Organic Chemistry Doping 021001 nanoscience & nanotechnology Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials Amorphous solid chemistry Excited state 0210 nano-technology Luminescence |
| Zdroj: | Optical Materials. 61:59-63 |
| ISSN: | 0925-3467 |
| DOI: | 10.1016/j.optmat.2016.05.045 |
| Popis: | Series of Eu 3+ -doped lead-free germanate and borate glasses were synthesized. The MO glass modifiers (M = Ca, Sr or Ba) were partially or totally substituted by MF 2 in chemical composition. In contrast to samples modified by CaO/CaF 2 or SrO/SrF 2 , the germanate glass samples containing BaO and/or BaF 2 are fully amorphous, while the lead-free borate glasses are fully amorphous, independently from glass modifiers. Effect of glass modifiers on spectroscopic properties of Eu 3+ were systematically investigated. For that reason, excitation and emission spectra of Eu 3+ ions in examined systems were registered. Based on the emission spectra, ratio of integrated luminescence intensity of the 5 D 0 → 7 F 2 transition to that of the 5 D 0 → 7 F 1 transition (R factor) was calculated. Moreover, the luminescence decay curves were collected and the luminescence lifetimes of the 5 D 0 excited state of Eu 3+ ions were determined in function of MF 2 concentration. |
| Databáze: | OpenAIRE |
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