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KLEMENT, R. DRDLÍKOVÁ, K. KACHLÍK, M. DRDLÍK, D. GALUSEK, D. MACA, K.
Original Title
Photoluminescence and optical properties of Eu3+/Eu2+-doped transparent Al2O3 ceramics
Type
journal article in Web of Science
Language
English
Original Abstract
Transparent Eu3+-doped (0.05–0.15 at. %) alumina ceramics with fine-grained microstructure were prepared and studied in terms of optical properties and photoluminescence (PL). The light transmission through ceramics up to dopant concentrations 0.125 at. % is dominated by birefringence scattering at grain boundaries. As confirmed by HRTEM/EDS element mapping, high photoluminescence intensity was achieved as the result of the dopant segregation at grain boundaries. The PL emission spectra of Al2O3:Eu3+ ceramics exhibited red light emissions with the highest intensity (394 nm excitation) for material containing 0.125 at. % of Eu3+. The luminescence decay was single-exponential with a lifetime ∼1.5 ms. The post-sintering reduction of Eu3+→Eu2+ under an H2 atmosphere (at 1300 °C) was difficult. Two simultaneously coexisting Eu2+ emitting PL centers were identified, one emitting blue light with average decay constant of 150 ns, and the other green light (more intense) with average decay constant of 1.3 μs.
Keywords
Alumina; Eu3+/Eu2+;Transparent ceramics; Luminescence; Decay time
Authors
KLEMENT, R.; DRDLÍKOVÁ, K.; KACHLÍK, M.; DRDLÍK, D.; GALUSEK, D.; MACA, K.
Released
24. 3. 2021
Publisher
Elsevier Ltd
ISBN
0955-2219
Periodical
Journal of the European Ceramic Society
Year of study
41
Number
9
State
United Kingdom of Great Britain and Northern Ireland
Pages from
4896
Pages to
4906
Pages count
11
URL
https://www.sciencedirect.com/science/article/pii/S0955221921001783
BibTex
@article{BUT171600, author="Róbert {Klement} and Katarina {Drdlíková} and Martin {Kachlík} and Daniel {Drdlík} and Dušan {Galusek} and Karel {Maca}", title="Photoluminescence and optical properties of Eu3+/Eu2+-doped transparent Al2O3 ceramics", journal="Journal of the European Ceramic Society", year="2021", volume="41", number="9", pages="4896--4906", doi="10.1016/j.jeurceramsoc.2021.03.029", issn="0955-2219", url="https://www.sciencedirect.com/science/article/pii/S0955221921001783" }