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

0518915 - ÚPT 2020 JP eng A - Abstrakt
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]
Grant CEP: GA TA ČR(CZ) TN01000008; GA MŠMT ED0017/01/01
Institucionální podpora: RVO:68081731
Klíčová slova: cathodoluminescence * multicomponent garnet * liquid phase epitaxy * single-crystalline film
Obor OECD: 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.
Trvalý link: http://hdl.handle.net/11104/0303921