Substantial reduction of trapping by Mg co-doping in LuAG:Ce,Mg epitaxial garnet films

0549998 - FZÚ 2022 RIV NL eng J - Journal Article
Průša, Petr - Kučera, M. - Vedda, A. - Fasoli, M. - Moretti, F. - Hanuš, M. - Lučeničová, Z. - Vrba, T. - Nikl, Martin
Substantial reduction of trapping by Mg co-doping in LuAG:Ce,Mg epitaxial garnet films.
Journal of Luminescence. Roč. 238, Oct (2021), č. článku 118230. ISSN 0022-2313. E-ISSN 1872-7883
Institutional support: RVO:68378271
Keywords : scintillator * Lu3Al5O12 * Mg co-doping * liquid phase epitaxy * thermoluminescence * bright burn
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 4.171, year: 2021
Method of publishing: Limited access
https://doi.org/10.1016/j.jlumin.2021.118230

Six Mg2+co-doped Lu3Al5O12:Ce scintillating garnet films prepared by liquid phase epitaxy, with Mg concen-tration from 0 to 3000 ppm, were irradiated by X-rays and underwent a series of thermoluminescence mea-surements 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 explana-tions, i.e., trap concentration reduction or increased competition in free electron capture between thermolu-minescence traps and Ce4+centers, were discussed.
Permanent Link: http://hdl.handle.net/11104/0325875