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Please use this identifier to cite or link to this item: http://acervodigital.unesp.br/handle/11449/67002
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dc.contributor.authorSoledade, L. E B-
dc.contributor.authorLongo, Elson-
dc.contributor.authorLeite, E. R.-
dc.contributor.authorPontes, F. M.-
dc.contributor.authorLanciotti, F.-
dc.contributor.authorCampos, C. E M-
dc.contributor.authorPizani, P. S.-
dc.contributor.authorVarela, José Arana-
dc.date.accessioned2014-05-27T11:20:31Z-
dc.date.accessioned2016-10-25T18:18:02Z-
dc.date.available2014-05-27T11:20:31Z-
dc.date.available2016-10-25T18:18:02Z-
dc.date.issued2002-11-01-
dc.identifierhttp://dx.doi.org/10.1007/s003390101140-
dc.identifier.citationApplied Physics A: Materials Science and Processing, v. 75, n. 5, p. 629-632, 2002.-
dc.identifier.issn0947-8396-
dc.identifier.urihttp://hdl.handle.net/11449/67002-
dc.identifier.urihttp://acervodigital.unesp.br/handle/11449/67002-
dc.description.abstractRoom-temperature photoluminescence (PL) was observed in undoped and 2 mol% Cr-, Al- and Y-doped amorphous SrTiO3 thin films. Doping increased the PL, and in the case of Cr significantly reduced the associated PL wavelength. The optical bandgaps, calculated by means of UV-vis absorption spectra, increased with crystallinity and decreased with the doping level. It was considered that yttrium and aluminum substituted Sr2+, whereas chromium replaced Ti4+. It is believed that luminescence centers are oxygen-deficient BO6 complexes, or the same centers with some other defects, such as oxygen or strontium vacancies, or BO6 complexes with some other defects placed in their neighborhood. The character of excitation and the competition for negatively charged non-bridging oxygen (NBO) among numerous types of BO6 defect complexes in doped SrTiO3 results in various broadband luminescence peak positions. The results herein reported are an indicative that amorphous titanates are sensitive to doping, which is important for the control of the electro-optic properties of these materials. The probable incorporation of Cr into the Ti site suggests that the existence of a double network former can lead to materials displaying a more intense photoluminescence.en
dc.format.extent629-632-
dc.language.isoeng-
dc.sourceScopus-
dc.subjectAbsorption spectroscopy-
dc.subjectAmorphous materials-
dc.subjectComposition effects-
dc.subjectCrystal defects-
dc.subjectCrystalline materials-
dc.subjectDoping (additives)-
dc.subjectElectrooptical effects-
dc.subjectNumerical analysis-
dc.subjectPhotoluminescence-
dc.subjectSubstitution reactions-
dc.subjectTemperature-
dc.subjectUltraviolet spectroscopy-
dc.subjectAcceptor type dopants-
dc.subjectNonbridging oxygen-
dc.subjectStrontium titanate-
dc.subjectStrontium compounds-
dc.titleRoom-temperature photoluminescence in amorphous SrTiO3-The influence of acceptor-type dopantsen
dc.typeoutro-
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)-
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.description.affiliationCMDMC LIEC, Department of Chemistry Federal University of São Carlos, C. Postal 676, 13565-905, São Carlos, SP-
dc.description.affiliationDepartment of Physics UFSCar Federal University of São Carlos, São Carlos, SP-
dc.description.affiliationCMDMC LIEC, Institute of Chemistry São Paulo State University, 13560-905, Araraquara, SP-
dc.description.affiliationUnespCMDMC LIEC, Institute of Chemistry São Paulo State University, 13560-905, Araraquara, SP-
dc.identifier.doi10.1007/s003390101140-
dc.rights.accessRightsAcesso restrito-
dc.relation.ispartofApplied Physics A: Materials Science and Processing-
dc.identifier.scopus2-s2.0-0036833282-
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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