Please use this identifier to cite or link to this item: https://physrep.ff.bg.ac.rs/handle/123456789/1336
DC FieldValueLanguage
dc.contributor.authorStojadinović, Stevanen_US
dc.contributor.authorĆirić, Aleksandaren_US
dc.date.accessioned2023-10-02T14:25:32Z-
dc.date.available2023-10-02T14:25:32Z-
dc.date.issued2023-01-01-
dc.identifier.issn03615235-
dc.identifier.urihttps://physrep.ff.bg.ac.rs/handle/123456789/1336-
dc.description.abstractOrthorhombic 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.ispartofJournal of Electronic Materialsen_US
dc.subjectDown-conversionen_US
dc.subjectEr 3+en_US
dc.subjectEr /Yb 3+ 3+en_US
dc.subjectPhotoluminescenceen_US
dc.subjectPlasma electrolytic oxidationen_US
dc.subjectUp-conversionen_US
dc.titleDual-Mode Photoluminescence of Er<sup>3+</sup> -Doped Ta<inf>2</inf>O<inf>5</inf> Coatings Formed by Plasma Electrolytic Oxidation of Tantalumen_US
dc.typeArticleen_US
dc.identifier.doi10.1007/s11664-023-10658-6-
dc.identifier.scopus2-s2.0-85169106741-
dc.identifier.urlhttps://api.elsevier.com/content/abstract/scopus_id/85169106741-
item.openairetypeArticle-
item.cerifentitytypePublications-
item.fulltextNo Fulltext-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.grantfulltextnone-
crisitem.author.orcid0000-0002-6589-6296-
Appears in Collections:Journal Article
Show simple item record

SCOPUSTM   
Citations

3
checked on Nov 19, 2024

Page view(s)

23
checked on Nov 22, 2024

Google ScholarTM

Check

Altmetric

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.