Size-Dependent Photoluminescence of Europium in Alumina Nanoparticles Synthesized by cw CO2 Laser Vaporization Full article
| Journal |
Journal of Alloys and Compounds
ISSN: 0925-8388 , E-ISSN: 1873-4669 |
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| Output data | Year: 2020, Volume: 815, Article number : 152476, Pages count : 12 DOI: 10.1016/j.jallcom.2019.152476 | ||||
| Tags | Defects; Laser vaporization; Nanosized Al2O3; Photoluminescence of Eu3+ and Eu2+ | ||||
| Authors |
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| Affiliations |
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Funding (2)
| 1 | Ministry of Science and Higher Education of the Russian Federation | ГЗ-2017-2020 |
| 2 | Russian Foundation for Basic Research | 18-03-00087 |
Abstract:
Nanosized Eu/γ- and/or η-Al2O3 ([Eu2О3] = 0.00, 0.02, 0.45 and 0.92 wt%) powders with the particle size from <10 nm to 21 nm synthesized by cw CO2 laser vaporization were studied. It was shown that photoluminescence (PL) properties of the obtained samples are caused by luminescence of the Eu3+ and Eu2+ ions incorporated to the Al2O3 matrix in crystallographic positions with the C3v local symmetry. A scheme based on the formation of Eu2+ ions in the Al2O3 lattice via the charge compensation by oxygen vacancies (F centers) located in the first coordination sphere of europium was proposed. The influence of size effects on PL of Eu/Al2O3 nanoparticles consists first of all in shortening the lifetime of 4f – 4f transitions in Eu3+ ions as a result of increased probability of nonradiative relaxation owing to OH groups and various structural defects. It was found that the conditions of laser vaporization (gas composition and pressure) can change the structure of the resulting Eu/Al2O3 nanoparticles.
Cite:
Kostyukov A.I.
, Snytnikov V.N.
, Zhuzhgov A.V.
, Cherepanova S.V.
, Ishchenko A.V.
, Baronskiy M.G.
, Snytnikov V.N.
Size-Dependent Photoluminescence of Europium in Alumina Nanoparticles Synthesized by cw CO2 Laser Vaporization
Journal of Alloys and Compounds. 2020. V.815. 152476 :1-12. DOI: 10.1016/j.jallcom.2019.152476 WOS Scopus РИНЦ ANCAN OpenAlex
Size-Dependent Photoluminescence of Europium in Alumina Nanoparticles Synthesized by cw CO2 Laser Vaporization
Journal of Alloys and Compounds. 2020. V.815. 152476 :1-12. DOI: 10.1016/j.jallcom.2019.152476 WOS Scopus РИНЦ ANCAN OpenAlex
Dates:
| Submitted: | Jun 28, 2019 |
| Accepted: | Sep 26, 2019 |
| Published online: | Sep 27, 2019 |
| Published print: | Jan 30, 2020 |
Identifiers:
| Web of science: | WOS:000502521900144 |
| Scopus: | 2-s2.0-85072755711 |
| Elibrary: | 41695689 |
| Chemical Abstracts: | 2019:1897690 |
| Chemical Abstracts (print): | 171:483764 |
| OpenAlex: | W2976910796 |