Substantial reduction of trapping by Mg co-doping in LuAG:Ce, Mg epitaxial garnet films
| Autor: | Anna Vedda, Martin Nikl, Zuzana Lučeničová, Martin Hanus, Miroslav Kučera, Petr Průša, Tomas Vrba, Mauro Fasoli, Federico Moretti |
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| Přispěvatelé: | Prusa, P, Kucera, M, Vedda, A, Fasoli, M, Moretti, F, Hanus, M, Lucenicova, Z, Vrba, T, Nikl, M |
| Rok vydání: | 2021 |
| Předmět: |
Free electron model
Materials science Thermoluminescence Orders of magnitude (temperature) Biophysics Analytical chemistry 02 engineering and technology Trapping 010402 general chemistry Epitaxy 01 natural sciences Biochemistry Ion Al Bright burn Irradiation Mg co-doping Liquid phase epitaxy Doping General Chemistry Scintillator 021001 nanoscience & nanotechnology Condensed Matter Physics Atomic and Molecular Physics and Optics 0104 chemical sciences FIS/01 - FISICA SPERIMENTALE Lu 0210 nano-technology |
| Zdroj: | Journal of Luminescence. 238:118230 |
| ISSN: | 0022-2313 |
| Popis: | Six Mg2+ co-doped Lu3Al5O12:Ce scintillating garnet films prepared by liquid phase epitaxy, with Mg concentration from 0 to 3000 ppm, were irradiated by X-rays and underwent a series of thermoluminescence measurements from 10 to 720 K. The thermoluminescence signal of epitaxial films originated purely from electron recombination at Ce ions. It was found that the area of all the peaks present in thermoluminescence glow curves decreased rapidly with the increase of Mg concentration; for 3000 ppm, the decrease was by 4–5 orders of magnitude. Moreover, the bright burn effect was significantly suppressed by Mg co-doping. Possible explanations, i.e., trap concentration reduction or increased competition in free electron capture between thermoluminescence traps and Ce4+ centers, were discussed. |
| Databáze: | OpenAIRE |
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