Publication:
Morphological and luminescent studies on nanosized Er, Yb-Yttrium oxide up-converter prepared from different precursors

dc.contributor.authorPires, Ana Maria [UNESP]
dc.contributor.authorSerra, O. A.
dc.contributor.authorDavolos, Marian Rosaly [UNESP]
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:27:15Z
dc.date.available2014-05-20T15:27:15Z
dc.date.issued2005-06-01
dc.description.abstractIn this paper, we report luminescent and morphological studies with yttrium oxide samples doped with ytterbium and erbium. The samples were prepared by the combustion method and also from different precursors: oxalate, basic carbonate and polymeric resin. All powders were identified Lis being an yttrium oxide with a C-form structure, independent of the employed precursor. From mean crystallite size measurements, it was verified that oxides prepared through the polymeric precursor and combustion methods lead to the smallest crystallite size. Particle shape and size were investigated by SEM and TEM, and showed that both the oxalate precursor and the combustion methods do not provide oxide materials of suitable shape or size, on the other hand. The basic carbonate and polymeric precursors resulted in spherically shaped particles with an average diameter of 90 and 15 run. respectively, Upon 980 run diode laser excitation, green and red emission lines were detected for all samples and were assigned to the H-2(11/2) S-4(3/2) -> I-4(15/2) and (4)Fg(9/2) -> 4I(15/12) transitions, respectively. Such transitions are characteristic for Er3+ and result from energy transfer from Yb3+ energy levels, F-2(7/2) -> F-2(5/2). A relationship between the decrease in the mean crystallite size and the enhancement in red emission was also established as well as the influence of the presence of a high percentage of Yb-3 Both factors promote ET from Yb3+ (F-2(5/2)) to Er3+ (I-4(11/2)). (c) 2004 Elsevier B.V. All rights reserved.en
dc.description.affiliationUniv São Paulo, Dept Quim, FFCLRP, BR-14040901 Ribeirao Preto, Brazil
dc.description.affiliationUniv Estadual Paulista, Inst Quim, BR-14801970 Araraquara, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Inst Quim, BR-14801970 Araraquara, SP, Brazil
dc.format.extent174-182
dc.identifierhttp://dx.doi.org/10.1016/j.jlumin.2004.09.122
dc.identifier.citationJournal of Luminescence. Amsterdam: Elsevier B.V., v. 113, n. 3-4, p. 174-182, 2005.
dc.identifier.doi10.1016/j.jlumin.2004.09.122
dc.identifier.issn0022-2313
dc.identifier.lattes4284809342546287
dc.identifier.urihttp://hdl.handle.net/11449/37271
dc.identifier.wosWOS:000229877200002
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofJournal of Luminescence
dc.relation.ispartofjcr2.732
dc.relation.ispartofsjr0,694
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectup-conversionpt
dc.subjectrare earthpt
dc.subjectphosphorpt
dc.subjectUPTpt
dc.subjectnanoparticlespt
dc.titleMorphological and luminescent studies on nanosized Er, Yb-Yttrium oxide up-converter prepared from different precursorsen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
dspace.entity.typePublication
unesp.author.lattes4284809342546287
unesp.author.lattes5408864375841292[1]
unesp.author.orcid0000-0001-8326-1465[3]
unesp.author.orcid0000-0001-9607-0510[1]
unesp.campusUniversidade Estadual Paulista (UNESP), Instituto de Química, Araraquarapt
unesp.departmentQuímica Inorgânica - IQARpt

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