Photoluminescence activity of Ba1-xCaxTiO3: dependence on particle size and morphology

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dc.contributor.authorSouza, Agda Eunice [UNESP]
dc.contributor.authorTeixeira, Silvio Rainho [UNESP]
dc.contributor.authorMorilla-Santos, Cassio
dc.contributor.authorSchreiner, Wido Herwig
dc.contributor.authorLisboa Filho, Paulo Noronha [UNESP]
dc.contributor.authorLongo, Elson [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniv Fed Parana
dc.date.accessioned2015-03-18T15:54:18Z
dc.date.available2015-03-18T15:54:18Z
dc.date.issued2014-01-01
dc.description.abstractIt was shown that the higher photoluminescence emission of Ba1-xCaxTiO3 titanates is associated with the substitution of Ba by Ca, for the composition x = 0.75, which interferes with structural ordering, morphology and particle growth. Although the XRD data of this sample showed that the crystals do not exhibit long range order, FTIR, Raman and XPS confirmed the presence of Ti-O bonds in this sample, indicating the particle nucleation of titanates, but without growth and maintaining only short range order. These nanoparticles show perturbations in the symmetry of the unit cell, causing structural distortions, which result in changes in their electronic structure of atoms, destabilizing the whole lattice. This fact gives rise to points of intrinsic defects, changing the intermediate levels in the band gap, subsequently adding to the population of charge carriers and, consequently, radiative recombination with higher photoluminescence emission.en
dc.description.affiliationUniv Estadual Paulista, Fac Ciencias & Tecnol, Dept Fis Quim & Biol, Presidente Prudente, SP, Brazil
dc.description.affiliationUniv Fed Parana, Inst Tecnol Desenvolvimento LACTEC, BR-80060000 Curitiba, Parana, Brazil
dc.description.affiliationUniv Fed Parana, Dept Fis, BR-80060000 Curitiba, Parana, Brazil
dc.description.affiliationUniv Estadual Paulista, Fac Ciencias, Dept Fis, Bauru, SP, Brazil
dc.description.affiliationUniv Estadual Paulista, Inst Quim, Araraquara, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Fac Ciencias & Tecnol, Dept Fis Quim & Biol, Presidente Prudente, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Fac Ciencias, Dept Fis, Bauru, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Inst Quim, Araraquara, SP, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipINCTMN
dc.description.sponsorshipIdFAPESP: 13/07296-2
dc.description.sponsorshipIdCNPq: 573636/2008-7
dc.description.sponsorshipIdINCTMN2008/57872-1
dc.format.extent7056-7070
dc.identifierhttp://dx.doi.org/10.1039/c4tc00897a
dc.identifier.citationJournal Of Materials Chemistry C. Cambridge: Royal Soc Chemistry, v. 2, n. 34, p. 7056-7070, 2014.
dc.identifier.doi10.1039/c4tc00897a
dc.identifier.issn2050-7526
dc.identifier.lattes9256541983393135
dc.identifier.lattes1353862414532005
dc.identifier.orcid0000-0002-7734-4069
dc.identifier.urihttp://hdl.handle.net/11449/116869
dc.identifier.wosWOS:000340587100018
dc.language.isoeng
dc.publisherRoyal Soc Chemistry
dc.relation.ispartofJournal Of Materials Chemistry C
dc.relation.ispartofjcr5.976
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.titlePhotoluminescence activity of Ba1-xCaxTiO3: dependence on particle size and morphologyen
dc.typeArtigo
dcterms.rightsHolderRoyal Soc Chemistry
unesp.author.lattes9256541983393135
unesp.author.lattes1353862414532005[5]
unesp.author.orcid0000-0002-7734-4069[5]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências e Tecnologia, Presidente Prudentept
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências, Baurupt
unesp.departmentFísica - FCpt

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Artigos - Física, Química e Biologia - FCT
Bauru - FC - Faculdade de Ciências