The role of the Eu3+ ions in structure and photoluminescence properties of SrBi2Nb2O9 powders

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dc.contributor.authorVolanti, Diogo P. [UNESP]
dc.contributor.authorRosa, Ieda L. V.
dc.contributor.authorParis, Elaine C.
dc.contributor.authorPaskocimas, Carlos A.
dc.contributor.authorPizani, Paulo S.
dc.contributor.authorVarela, José Arana [UNESP]
dc.contributor.authorLongo, Elson [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)
dc.contributor.institutionUniversidade Federal da Paraíba (UFPB)
dc.contributor.institutionUniversidade Federal do Rio Grande do Norte (UFRN)
dc.date.accessioned2014-05-20T14:18:40Z
dc.date.available2014-05-20T14:18:40Z
dc.date.issued2009-04-01
dc.description.abstractThis work rationalized for the first time the key role of Eu3+ ion in the doping process of SrBi2Nb2O9 (SBN) compound. This process allows LIS to understand the role of Eu3+ as lattice modifier as well as to obtain information on the crystalline structure surrounding. Therefore, the SBN and Eu3+ doped SBN (SBN:Eu) were synthesized using the polymeric precursor method (PPM). Scanning electron microscope (SEM) images reveal the strong influence of europium on the SBN microstructure. Thermogravimetry (TG) and differential thermal analysis (DTA) techniques were used to determine the weight loss and changes associated with phase transitions in SBN during thermal evolution. The behavior of the Eu3+ lattice modifier was followed in a long-range order by X-ray diffraction (XRD), while Fourier transform Raman (FT-Raman) spectroscopy was used to analyze the short-range order. To this end, the SBN orthorhombic phase was observed for all samples hear treated from 400 to 700 degrees C for 2 h. In addition, photoluminescence measurements were employed to study the structural modifications in SBN lattice. The characteristic red emission of the Eu3+ using the 488 nm exciting wavelength of an argon-ion laser was distinctly observed for SBN:Eu samples heat treated from 550 to 700 degrees C. Europium characteristic emission bands are related to D-5(l)-> F-7(J) (J = 0-2) transitions at 538 and 555 nm, as well as the D-5(0)-> F-7(J) (J = 0-4) ones at 580, 592, 615, 653 and 695 nm. By means of the emission spectra analyses it was possible to predict that the Eu3+ ions are located at sites of higher symmetry, since the relative area of the (D-5(0)-> F-7(2))/(D-5(0)-> F-7(1)) transitions for the SBN:Eu samples decrease from 3.82 to 2.60 with increasing temperature from 550 to 700 degrees C. (c) 2008 Elsevier B.V. All rights reserved.en
dc.description.affiliationSão Paulo State Univ, UNESP, Inst Chem, BR-14800900 Araraquara, SP, Brazil
dc.description.affiliationUniversidade Federal de São Carlos (UFSCar), UFSCar, Dept Chem, BR-13565905 São Carlos, SP, Brazil
dc.description.affiliationUniversidade Federal da Paraíba (UFPB), Dept Chem, UFPB, BR-58059900 Joao Pessoa, Paraiba, Brazil
dc.description.affiliationUniversidade Federal do Rio Grande do Norte (UFRN), UFRN, Dept Mech Engn, BR-59072970 Natal, RN, Brazil
dc.description.affiliationUniversidade Federal de São Carlos (UFSCar), Dept Phys, UFSCar, BR-13565905 São Carlos, SP, Brazil
dc.description.affiliationUnespSão Paulo State Univ, UNESP, Inst Chem, BR-14800900 Araraquara, SP, Brazil
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipFAPESQ
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipIdFAPESP: 98/14324-0
dc.format.extent995-999
dc.identifierhttp://dx.doi.org/10.1016/j.optmat.2008.11.006
dc.identifier.citationOptical Materials. Amsterdam: Elsevier B.V., v. 31, n. 6, p. 995-999, 2009.
dc.identifier.doi10.1016/j.optmat.2008.11.006
dc.identifier.issn0925-3467
dc.identifier.lattes2354739980406725
dc.identifier.orcid0000-0001-9315-9392
dc.identifier.urihttp://hdl.handle.net/11449/25635
dc.identifier.wosWOS:000265325400041
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofOptical Materials
dc.relation.ispartofjcr2.320
dc.relation.ispartofsjr0,592
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectPhotoluminescenceen
dc.subjectStrontium bismuth niobateen
dc.subjectEuropiumen
dc.subjectPolymeric precursor methoden
dc.titleThe role of the Eu3+ ions in structure and photoluminescence properties of SrBi2Nb2O9 powdersen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.author.lattes2354739980406725[1]
unesp.author.orcid0000-0001-9315-9392[1]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Química, Araraquarapt

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