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

0469999 - FZÚ 2017 RIV NL eng J - Journal Article
Bartosiewicz, Karol - Babin, Vladimir - Nikl, Martin - Mareš, Jiří A. - Zorenko, Yu. - Gorbenko, V.
Luminescence and energy transfer processes in (Lu,Tb)₃Al₅O₁₂ single crystalline films doped with Ce³⁺.
Journal of Luminescence. Roč. 173, May (2016), s. 141-148. ISSN 0022-2313. E-ISSN 1872-7883
R&D Projects: GA ČR GA16-15569S; GA ČR GAP204/12/0805
EU Projects: European Commission(XE) 316906 - LUMINET
Institutional support: RVO:68378271
Keywords : lutetium terbium aluminum garnets * Ce³⁺ * energy transfer * luminescence * single crystalline films
Subject RIV: BH - Optics, Masers, Lasers
Impact factor: 2.686, year: 2016

The luminescence properties of terbium lutetium aluminium garnet single crystalline films, Lu3−xTbxAl5O12, doped with Ce3+ are investigated as a function of the Tb/Lu ratio with aim of an improved understanding of the energy transfer processes between Ce3+ and Tb3+ ions in the aluminium garnet hosts. Due to replacing the smaller Lu3+ ion with the larger Tb3+ ion, the crystal field splitting for the 5d energy levels of Ce3+ ions increases, causing the shift of the lowest 5d state of Ce3+ below the 5D4 energy level of Tb3+. This allows for the efficient energy transfer from Tb3+ to Ce3+ even at the low temperatures. The measurements of temperature dependence of the decay time of Tb3+ and Ce3+ luminescence confirm an efficient energy transfer from Tb3+ to Ce3+ and provide a qualitative understanding of this process.
Permanent Link: http://hdl.handle.net/11104/0267744