Effect of Mg.sup.2+./sup. co-doping on the photo- and thermally stimulated luminescence of the (Lu,Gd).sub.3./sub.(Ga,Al).sub.5./sub.O.sub.12./sub.:Ce epitaxial films

0511019 - FZÚ 2020 RIV NL eng J - Článek v odborném periodiku
Babin, Vladimir - Heřman, P. - Kučera, M. - Nikl, Martin - Zazubovich, S.
Effect of Mg²⁺ co-doping on the photo- and thermally stimulated luminescence of the (Lu,Gd)₃(Ga,Al)₅O₁₂:Ce epitaxial films.
Journal of Luminescence. Roč. 215, Nov (2019), s. 1-10, č. článku 116608. ISSN 0022-2313. E-ISSN 1872-7883
Grant CEP: GA ČR GA16-15569S; GA MŠMT EF16_013/0001406; GA MŠMT(CZ) LO1409
Grant ostatní: OP VVV - SAFMAT(XE) CZ.02.1.01/0.0/0.0/16_013/0001406
Institucionální podpora: RVO:68378271
Klíčová slova: luminescence * (Lu,Gd)₃(Ga,Al)₅O₁₂ * Mg epitaxial films * defects * scintillators
Obor OECD: Optics (including laser optics and quantum optics)
Impakt faktor: 3.280, rok: 2019
Způsob publikování: Omezený přístup
https://doi.org/10.1016/j.jlumin.2019.116608

Photoluminescence and thermally stimulated luminescence of Ce3+-doped (Lu,Gd)3(Ga,Al)5O12 epitaxial films co-doped with different content of Mg2+ ions are investigated in the 60–500 K temperature range under excitation in the Ce3+-related 4f→5d absorption bands and in the absorption bands arising from the 8S7/2→6IJ and 8S7/2→6PJ electronic transitions of Gd3+ ions. Influence of Mg2+ ions on the Ce3+-related luminescence intensity, spectrum, decay kinetics, temperature dependence of the emission intensity, and the activation energy of the luminescence thermal quenching is studied. The shortening of the decay time and simultaneous reduction of its light yield are explained by the presence of {Ce3+-Mg2+} centers. Co-doping with Mg2+ results in the reduction of the afterglow and thermally stimulated luminescence and shortening of the afterglow decay kinetics. It influences also defects creation spectra and the activation energy of the photostimulated defects creation.

Trvalý link: http://hdl.handle.net/11104/0301375