Dependence of Ce.sup.3+./sup. related photo- and thermally stimulated luminescence characteristics on Mgt.sup.2+./sup. content in single crystals and epitaxial films of Gd.sub.3./sub.(Ga,Al).sub.5./sub.O.sub.12./sub.:Ce,Mg

0492846 - FZÚ 2019 RIV NL eng J - Článek v odborném periodiku
Babin, Vladimir - Boháček, Pavel - Jurek, Karel - Kučera, M. - Nikl, Martin - Zazubovich, S.
Dependence of Ce³⁺ related photo- and thermally stimulated luminescence characteristics on Mgt²⁺ content in single crystals and epitaxial films of Gd₃(Ga,Al)₅O₁₂:Ce,Mg.
Optical Materials. Roč. 83, Sep (2018), s. 290-299. ISSN 0925-3467. E-ISSN 1873-1252
Grant CEP: GA ČR GA16-15569S
Institucionální podpora: RVO:68378271
Klíčová slova: luminescence * Gd₃(Ga,Al)₅O₁₂:Ce,Mg * single crystals * epitaxial films * scintillators
Obor OECD: Optics (including laser optics and quantum optics)
Impakt faktor: 2.687, rok: 2018

Photoluminescence and thermally stimulated luminescence of Gd-3(Ga,Al)(5)O-12:Ce single crystals and epitaxial films co-doped with different concentrations of Mg2+ ions are investigated in the 77-500 K temperature range under excitation in the 4f 5d(1) and 4f 5d(2) absorption bands of Ce3+ ions. Influence of Mg2+ ions on the photoluminescence intensity, spectrum, decay kinetics, temperature dependence of the photoluminescence intensity, and the activation energy of luminescence thermal quenching is observed. Co-doping with Mg2+ is shown to result in a drastic reduction of the afterglow and thermally stimulated luminescence and in a strong shortening of the afterglow decay kinetics. It influences also defects creation spectra and the activation energy of the photostimulated defects creation. The Mg2+ induced changes in the characteristics of the Gd-3(Ga,Al)(5)O-12:Ce, Mg single crystals and epitaxial films are found to be strongly different, and possible reasons of these differences are discussed.
Trvalý link: http://hdl.handle.net/11104/0286273