Luminescence and energy transfer processes in Ce.sup.3+./sup. activated (Gd,Tb).sub.3./sub.Al.sub.5./sub.O.sub.12./sub. single crystalline films

0476807 - FZÚ 2018 RIV NL eng J - Journal Article
Bartosiewicz, Karol - Babin, Vladimir - Mareš, Jiří A. - Beitlerová, Alena - Zorenko, Yu. - Iskaliyeva, A. - Gorbenko, V. - Bryknar, Z. - Nikl, Martin
Luminescence and energy transfer processes in Ce³⁺ activated (Gd,Tb)₃Al₅O₁₂ single crystalline films.
Journal of Luminescence. Roč. 188, Aug (2017), s. 60-66. ISSN 0022-2313. E-ISSN 1872-7883
R&D Projects: GA ČR GA16-15569S; GA MŠMT LO1409
EU Projects: European Commission(XE) 316906 - LUMINET
Institutional support: RVO:68378271
Keywords : gadolinium terbium aluminum garnets * Ce³⁺ * energy transfer * luminescence * single crystalline flms
OECD category: Optics (including laser optics and quantum optics)
Impact factor: 2.732, year: 2017

The luminescence and scintillation properties of gadolinium terbium aluminium garnet single crystalline films, Gd3-xTbxAl5O12, doped with Ce3+ are investigated as a function of the Gd/Tb ratio with the aim of an improved understanding of the energy transfer processes between Ce3+ and Tb3+ ions in the aluminium garnet hosts. Upon replacing the Gd3+ by Tb3+, the crystal field splitting for the 5d energy level of Ce3+ does not change significantly, due to comparable sizes of the Gd3+ and Tb3+ cations. Temperature dependence of the decay time of Tb3+ and Ce3+ luminescence confirms an efficient energy transfer from the Tb3+ to Ce3+ and provides a qualitative understanding of this process. Furthermore, bidirectional energy transfer processes between the Ce3+ and Tb3+ are revealed. Scintillation decays under alpha-particles excitation show the presence of the fast and slow sub-microsecond components.
Permanent Link: http://hdl.handle.net/11104/0273224