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Annealing effects on the microstructure and photoluminescence of Eu3+-doped GdVO4 powders
dc.creator | Jovanović, Dragana J. | |
dc.creator | Antić, Željka | |
dc.creator | Krsmanović, Radenka | |
dc.creator | Mitrić, Miodrag | |
dc.creator | Đorđević, Vesna R. | |
dc.creator | Bartova, Barbora | |
dc.creator | Dramićanin, Miroslav | |
dc.date.accessioned | 2018-03-01T23:37:47Z | |
dc.date.available | 2018-03-01T23:37:47Z | |
dc.date.issued | 2013 | |
dc.identifier.issn | 0925-3467 | |
dc.identifier.uri | https://vinar.vin.bg.ac.rs/handle/123456789/5639 | |
dc.description.abstract | This work explores the influence of annealing temperature on microstructure and optical characteristics of Eu3+ doped GdVO4 (0.5, 1, 2 and 3 at.% Eu3+) nanopowders produced via co-precipitation synthesis. Samples were annealed at different temperatures (300 degrees C, 600 degrees C, 800 degrees C and 1000 degrees C) for 2 h and XRD analyses confirmed their tetragonal zircon structure. As-synthesized powders were composed of nanorods (diameter similar to 5 nm, length similar to 20 nm) organized in bundles, which by annealing grew to faceted crystals of round and rectangular shape (50-150 nm in size). Energy band gap shifts to higher energy (3.56 eV - GT 3.72 eV) with decreasing crystallite size (43 nm - GT 13 nm). Photoluminescence emission spectra were recorded using two different excitation wavelengths: lambda(ex) = 330 nm and lambda(ex) = 466 nm, aiming to excite directly the host matrix and Eu3+ ions, respectively. The intensity of most pronounced red transitions is one order of magnitude higher for lambda(ex) = 330 nm due to a strong energy absorption of VO43- groups, followed by efficient energy transfer to Eu3+ ions. We investigated the influence of annealing temperature and concentration of Eu3+ ions on the optical properties, namely photoluminescence emission and excitation, and decay time. The maximum intensity of D-5(0) - GT F-7(2) red emission is observed for sample treated at 1000 degrees C, containing 2 at.% of Eu3+ ions. With the increase of Eu3+ concentration (0.5-3 at.%) the decay time of D-5(0) - GT F-7(2) transition decreases from similar to 1 ms to 0.5 ms. (c) 2013 Elsevier B.V. All rights reserved. | en |
dc.relation | info:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/45020/RS// | |
dc.relation | info:eu-repo/grantAgreement/MESTD/Basic Research (BR or ON)/172056/RS// | |
dc.rights | restrictedAccess | en |
dc.source | Optical Materials | en |
dc.subject | Co-precipitation synthesis | en |
dc.subject | GdVO4 | en |
dc.subject | Rare earths | en |
dc.subject | Photoluminescence | en |
dc.title | Annealing effects on the microstructure and photoluminescence of Eu3+-doped GdVO4 powders | en |
dc.type | article | en |
dcterms.abstract | Јовановић Драгана; Крсмановић Раденка; Митрић Миодраг; Ђорђевић Весна; Драмићанин Мирослав; Aнтиц, Зељка; Бартова, Барбора; | |
dc.citation.volume | 35 | |
dc.citation.issue | 10 | |
dc.citation.spage | 1797 | |
dc.citation.epage | 1804 | |
dc.identifier.wos | 000323401700009 | |
dc.identifier.doi | 10.1016/j.optmat.2013.03.012 | |
dc.citation.other | Special Issue: SI | |
dc.citation.rank | M21 | |
dc.identifier.scopus | 2-s2.0-84880922070 |
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