Upconversion luminescence in transparent glass ceramics containing beta-PbF2 nanocrystals doped with erbium

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dc.contributor.authorNeto, A. S.
dc.contributor.authorda Costa, E. B.
dc.contributor.authorBueno, L. A.
dc.contributor.authorRibeiro, SJL
dc.contributor.institutionUniversidade Federal Rural de Pernambuco (UFRPE)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:24:22Z
dc.date.available2014-05-20T15:24:22Z
dc.date.issued2004-07-28
dc.description.abstractFrequency upconversion luminescence in erbium-doped PbGeO3-PbF2-CdF2-based transparent glass ceramics (TGC) under 980 nm infrared excitation is investigated. Upconversion emission signals around 410, 525, 550, 660, and 850 nm were generated and identified as due to the H-2(9/2) H-2(11/2), S-4(3/2), and F-4(9/2) transitions to the I-4(15/2) ground-state, and S-4(3/2)-I-4(13/2), respectively. The erbium ions excited-state emitting levels were populated via a combination of stepwise ground-state absorption (GSA), excited-state absorption (ESA), and cross-relaxation processes. The results also disclosed that both blue (410 nm) and red (660 nm) upconversion emission signals in the transparent glass ceramic sample presented twice as much intensity as compared to its vitreous counterpart. (C) 2003 Elsevier B.V. All rights reserved.en
dc.description.affiliationUniv Fed Rural Pernambuco, Lab Foto, Dept Fis & Matemat, BR-52171900 Recife, PE, Brazil
dc.description.affiliationUNESP, Inst Quim, BR-14800900 Araraquara, SP, Brazil
dc.description.affiliationUnespUNESP, Inst Quim, BR-14800900 Araraquara, SP, Brazil
dc.format.extent224-228
dc.identifierhttp://dx.doi.org/10.1016/j.jallcom.2003.11.040
dc.identifier.citationJournal of Alloys and Compounds. Lausanne: Elsevier B.V. Sa, v. 375, n. 1-2, p. 224-228, 2004.
dc.identifier.doi10.1016/j.jallcom.2003.11.040
dc.identifier.issn0925-8388
dc.identifier.urihttp://hdl.handle.net/11449/34996
dc.identifier.wosWOS:000222543800037
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofJournal of Alloys and Compounds
dc.relation.ispartofjcr3.779
dc.relation.ispartofsjr1,020
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectupconversionpt
dc.subjectvitroceramicspt
dc.subjectrare-earthpt
dc.subjectluminescencept
dc.titleUpconversion luminescence in transparent glass ceramics containing beta-PbF2 nanocrystals doped with erbiumen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.

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