Photoluminescent Properties of Eu3+ in Different γ-, η-, θ-, and α-Al2O3 Polymorphs Full article
| Journal |
Journal of Structural Chemistry
ISSN: 0022-4766 , E-ISSN: 1573-8779 |
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| Output data | Year: 2023, Volume: 64, Number: 12, Pages: 2391–2403 Pages count : 13 DOI: 10.1134/S0022476623120119 | ||
| Tags | γ-Al2O3; η-Al2O3; θ-Al2O3; α-Al2O3; Eu3+ luminescence; phase composition; decay kinetics; asymmetry ratio | ||
| Authors |
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| Affiliations |
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Funding (2)
| 1 | Ministry of Science and Higher Education of the Russian Federation | 0239-2021-0004 |
| 2 | Ministry of Science and Higher Education of the Russian Federation | 0239-2021-0011 |
Abstract:
Photoluminescent properties of the Eu3+ ion as a probe are studied in γ-, η-, θ-, and α-Al2O3:Eu3+ polymorphs with an europium concentration of 0.05 wt.%. The photoluminescence (PL) spectra of Eu3+ ions are analyzed in the 5D0 → 7FJ (J = 0-4) transition region along with the asymmetry ratio, decay kinetics, and PL excitation spectra. It is found that Eu3+ ions incorporate into the Al2O3 lattice and occupy the site with the C3v local symmetry. The biexponential nature of the Eu3+ PL decay kinetics in γ-, η-, θ-, and Al2O3:Eu3+ polymorphs is shown to be due to the occurrence of Eu3+ ions both in the bulk and at subsurface sites. For α-Al2O3:Eu3+ the concentration of surface centers is minimum and the PL decay kinetics is described only by one exponent. Based on the comprehensive analysis of the obtained results on PL of single-phase Al2O3 powders, the characteristic features are revealed, such as PL intensity, electronic structure of 5D0 → 7FJ transitions, asymmetry ratio, position of the O2– → Eu3+ charge transfer band, and 5D0 lifetimes. These characteristics allow the use of Eu3+ ions as structure-sensitive probes to study the local structure of Al2O3 and to identify its phase composition during structural transformations.
Cite:
Kostyukov A.I.
, Baronskii M.G.
, Zhuzhgov A.V.
Photoluminescent Properties of Eu3+ in Different γ-, η-, θ-, and α-Al2O3 Polymorphs
Journal of Structural Chemistry. 2023. V.64. N12. P.2391–2403. DOI: 10.1134/S0022476623120119 WOS Scopus РИНЦ AN OpenAlex
Photoluminescent Properties of Eu3+ in Different γ-, η-, θ-, and α-Al2O3 Polymorphs
Journal of Structural Chemistry. 2023. V.64. N12. P.2391–2403. DOI: 10.1134/S0022476623120119 WOS Scopus РИНЦ AN OpenAlex
Original:
Костюков A.И.
, Баронский М.Г.
, Жужгов А.В.
Фотолюминесцентные свойства Eu3+ в различных полиморфных модификациях γ-, η-, θ- и α-Al2O3
Журнал структурной химии. 2023. Т.64. №12. 119770 :1-14. DOI: 10.26902/jsc_id119770 РИНЦ OpenAlex
Фотолюминесцентные свойства Eu3+ в различных полиморфных модификациях γ-, η-, θ- и α-Al2O3
Журнал структурной химии. 2023. Т.64. №12. 119770 :1-14. DOI: 10.26902/jsc_id119770 РИНЦ OpenAlex
Dates:
| Submitted: | Jun 22, 2023 |
| Accepted: | Sep 19, 2023 |
| Published print: | Dec 29, 2023 |
| Published online: | Dec 29, 2023 |
Identifiers:
| Web of science: | WOS:001132105400006 |
| Scopus: | 2-s2.0-85180902225 |
| Elibrary: | 62892562 |
| Chemical Abstracts: | 2024:9898 |
| OpenAlex: | W4390414125 |
Citing:
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