Specific absorption in Y.sub.3./sub.Al.sub.5./sub.O.sub.12./sub.:Eu ceramics and the role of stable Eu.sup.2+./sup. in energy transfer processes

0538671 - FZÚ 2021 RIV GB eng J - Článek v odborném periodiku
Buryi, Maksym - Havlák, Lubomír - Jarý, Vítězslav - Bárta, Jan - Laguta, Valentyn - Beitlerová, Alena - Li, J. - Chen, X. - Yuan, Y. - Liu, Q. - Pan, Y. - Nikl, Martin
Specific absorption in Y₃Al₅O₁₂:Eu ceramics and the role of stable Eu²⁺ in energy transfer processes.
Journal of Materials Chemistry C. Roč. 8, č. 26 (2020), s. 8823-8839. ISSN 2050-7526. E-ISSN 2050-7534
Grant CEP: GA MŠMT(CZ) EF16_019/0000760; GA ČR(CZ) GA20-12885S
Grant ostatní: OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institucionální podpora: RVO:68378271
Klíčová slova: scintillating ceramics * YAG garnet * Eu²⁺ * F⁺ center * annealing
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 7.393, rok: 2020
Způsob publikování: Omezený přístup
https://doi.org/10.1039/d0tc01957g

Several sets of Eu-doped Y3Al5O12 (YAG) ceramic samples were synthesized by the vacuum sintering technique. Their structural, optical and magnetic properties were investigated by means of X-ray diffraction, X-ray fluorescence, optical absorption, time-resolved luminescence spectroscopy and electron paramagnetic resonance. Multiple annealing in different atmospheres was employed to understand the nature of strong specific absorption bands peaking at about 250, 370 and 550 nm in the case of these ceramics. The influence of sintering aids used during the preparation of ceramics (such as tetraethyl orthosilicate and/or magnesium oxide) on the optical properties is thoroughly studied. The charge transfer transition in the EuY+ + F+ pair center is suggested to explain the nature of these absorption bands which is also supported by the peculiarities of the Eu2+ 5d–4f and F+/F luminescence occurrence.
Trvalý link: http://hdl.handle.net/11104/0316425