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Cathodoluminescence Performance of LuAG:Pr Single-Crystalline Films Optimized by Sc,Ga-codoping

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    0518915 - ÚPT 2020 JP eng A - Abstract
    Lalinský, Ondřej - Schauer, Petr - Hanuš, M. - Kučera, M.
    Cathodoluminescence Performance of LuAG:Pr Single-Crystalline Films Optimized by Sc,Ga-codoping.
    SCINT 2019. 15th International Conference on Scintillating Materials and their Applications. Proceedings. Sendai: Tohoku University, 2019. s. 135.
    [SCINT 2019. International Conference on Scintillating Materials and their Applications /15./. 29.09.2019-04.10.2019, Sendai]
    R&D Projects: GA TA ČR(CZ) TN01000008; GA MŠk ED0017/01/01
    Institutional support: RVO:68081731
    Keywords : cathodoluminescence * multicomponent garnet * liquid phase epitaxy * single-crystalline film
    OECD category: Condensed matter physics (including formerly solid state physics, supercond.)

    Pr3+-activated lutetium aluminum garnet (LuAG:Pr) scintillator exhibits a broad emission band in the UV range between 300 and 400 nm and short decay time of ~20 ns, but also noticeable slow components
    caused probably by the antisite defects. It was shown previously, that Ga substitution suppressed these components, but also lowered scintillators’ light yield. Also previously, the light yield was improved by 60-80% due to Sc-codoping in LuAG:Pr,Sc single crystalline films. In this study, LuA(G)G:Pr,Sc single crystalline films were grown by the liquid-phase epitaxy with various substituent concentrations. These specimens were studied by the spectrally-, time- and temperature-resolved cathodoluminescence (CL). Due to slight (1.1) Ga substitution, the integrated CL intensity doubled and decay remained similar in comparison to Ga-free film. Higher Ga concentration lowers the afterglow, shortens the decay, somehow reduces CL
    intensity, which is, however, still slightly higher than that of Ga-free film.
    Permanent Link: http://hdl.handle.net/11104/0303921

     
     
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