Please use this identifier to cite or link to this item:
https://physrep.ff.bg.ac.rs/handle/123456789/1336
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Stojadinović, Stevan | en_US |
dc.contributor.author | Ćirić, Aleksandar | en_US |
dc.date.accessioned | 2023-10-02T14:25:32Z | - |
dc.date.available | 2023-10-02T14:25:32Z | - |
dc.date.issued | 2023-01-01 | - |
dc.identifier.issn | 03615235 | - |
dc.identifier.uri | https://physrep.ff.bg.ac.rs/handle/123456789/1336 | - |
dc.description.abstract | Orthorhombic Ta2O5:Er3+ coatings were obtained by plasma electrolytic oxidation (PEO) of tantalum in an alkaline electrolyte with the addition of Er2O3 particles in various concentrations. Down-conversion photoluminescence (PL) emission spectra is featured by sharp bands attributed to 4f–4f transitions of Er3+. The most intense green PL emission band centered at 544 nm is attributed to the 4S3/2 → 4I15/2 emission of Er3+. Population paths of the Er3+ down-conversion PL happen under resonant excitation conditions of the Er3+ from ground state 4I15/2 to higher levels, and via a broad violet charge transfer excitation band. Both excitation energy and Er content have an impact on the PL emission response in Ta2O5:Er3+ coatings. The 4I15/2 → 4G11/2 transition is the dominant excitation pathway for the PL emission of Er3+. Up-conversion PL spectra created after 980 nm irradiation of Ta2O5:Er3+ coatings have characteristic 4f–4f transitions of Er3+. The intensity of the green 4S3/2 → 4I15/2 is much higher compared to the red 4F9/2 → 4I15/2 emission of Er3+. Co-doping Ta2O5:Er3+ coatings with sensitizer Yb3+ ions increased the up-conversion emission PL intensity of Er3+ thanks to the efficient energy transfer from Yb3+ to Er3+. The red up-conversion PL intensity of 4F9/2 → 4I15/2 transition increases more rapidly with respect to green emission 4S3/2 → 4I15/2. A phonon-assisted energy back transfer process from Er3+ ions (4S3/2 → 4I13/2) to the neighboring Yb3+ ions (2F7/2 → 2F5/2) leads to enhanced red emission 4F9/2 → 4I15 and decreased green emission 4S3/2 → 4I15/2. | en_US |
dc.relation.ispartof | Journal of Electronic Materials | en_US |
dc.subject | Down-conversion | en_US |
dc.subject | Er 3+ | en_US |
dc.subject | Er /Yb 3+ 3+ | en_US |
dc.subject | Photoluminescence | en_US |
dc.subject | Plasma electrolytic oxidation | en_US |
dc.subject | Up-conversion | en_US |
dc.title | Dual-Mode Photoluminescence of Er<sup>3+</sup> -Doped Ta<inf>2</inf>O<inf>5</inf> Coatings Formed by Plasma Electrolytic Oxidation of Tantalum | en_US |
dc.type | Article | en_US |
dc.identifier.doi | 10.1007/s11664-023-10658-6 | - |
dc.identifier.scopus | 2-s2.0-85169106741 | - |
dc.identifier.url | https://api.elsevier.com/content/abstract/scopus_id/85169106741 | - |
item.grantfulltext | none | - |
item.openairetype | Article | - |
item.cerifentitytype | Publications | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | No Fulltext | - |
crisitem.author.orcid | 0000-0002-6589-6296 | - |
Appears in Collections: | Journal Article |
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