Near-infrared and blue cooperative Yb3+ luminescence in Lu3Sc2Ga3O12 nano-garnets
| Autor: | Víctor Lavín, R Praveena, C.K. Jayasankar, V. Sravani Sameera, Inocencio R. Martín, Vemula Venkatramu, P. Venkatalakshmamma |
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| Rok vydání: | 2018 |
| Předmět: |
Ytterbium
Materials science Quenching (fluorescence) Mechanical Engineering Doping Analytical chemistry chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Spectral line Nanocrystalline material Ion 010309 optics chemistry Mechanics of Materials 0103 physical sciences General Materials Science Diffuse reflection 0210 nano-technology Luminescence |
| Zdroj: | Materials Research Bulletin. 101:347-352 |
| ISSN: | 0025-5408 |
| Popis: | Nanocrystalline Lu3Sc2Ga3O12 garnet powders doped with different concentrations of trivalent ytterbium (Yb3+) ions have been prepared by sol-gel method. These garnet nano-powders have been characterized for their structural and luminescence properties using X-ray diffraction, diffuse reflectance and luminescence spectra. Near-infrared and blue cooperative upconversion luminescence spectra and decay curves of Yb3+ ions in these nano-garnets have been measured as a function of the optically active ion concentration. Quenching of near-infrared and cooperative luminescence intensity beyond 5.0 mol% of Yb3+ ion concentration have been observed. Variation of blue cooperative luminescence intensity with pump power has also been discussed. |
| Databáze: | OpenAIRE |
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