Evaluation of Bulk and Surfaces Absorption Edge Energy of Sol-Gel-Dip-Coating SnO2 Thin Films

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dc.contributor.authorFloriano, Emerson Aparecido [UNESP]
dc.contributor.authorScalvi, Luis Vicente de Andrade [UNESP]
dc.contributor.authorSambrano, Julio Ricardo [UNESP]
dc.contributor.authorGeraldo, Viviany [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Federal de Minas Gerais (UFMG)
dc.date.accessioned2014-05-20T13:26:22Z
dc.date.available2014-05-20T13:26:22Z
dc.date.issued2010-10-01
dc.description.abstractThe absorption edge and the bandgap transition of sol-gel-dip-coating SnO2 thin films, deposited on quartz substrates, are evaluated from optical absorption data and temperature dependent photoconductivity spectra. Structural properties of these films help the interpretation of bandgap transition nature, since the obtained nanosized dimensions of crystallites are determinant on dominant growth direction and, thus, absorption energy. Electronic properties of the bulk and (110) and (101) surfaces are also presented, calculated by means of density functional theory applied to periodic calculations at B3LYP hybrid functional level. Experimentally obtained absorption edge is compared to the calculated energy band diagrams of bulk and (110) and (101) surfaces. The overall calculated electronic properties in conjunction with structural and electro-optical experimental data suggest that the nature of the bandgap transition is related to a combined effect of bulk and (101) surface, which presents direct bandgap transition.en
dc.description.affiliationState Univ São Paulo UNESP, Adv Mat Grp, BR-17033360 São Paulo, Brazil
dc.description.affiliationState Univ São Paulo UNESP, Defects Semicond & Insulators Grp, BR-17033360 São Paulo, Brazil
dc.description.affiliationState Univ São Paulo UNESP, Dept Phys FC, BR-17033360 São Paulo, Brazil
dc.description.affiliationState Univ São Paulo UNESP, Modeling & Mol Simulat Grp DM FC, BR-17033360 São Paulo, Brazil
dc.description.affiliationFed Univ Minas Gerais UFMG, Lab Nanomat, BR-31270901 Belo Horizonte, MG, Brazil
dc.description.affiliationUnespState Univ São Paulo UNESP, Adv Mat Grp, BR-17033360 São Paulo, Brazil
dc.description.affiliationUnespState Univ São Paulo UNESP, Defects Semicond & Insulators Grp, BR-17033360 São Paulo, Brazil
dc.description.affiliationUnespState Univ São Paulo UNESP, Dept Phys FC, BR-17033360 São Paulo, Brazil
dc.description.affiliationUnespState Univ São Paulo UNESP, Modeling & Mol Simulat Grp DM FC, BR-17033360 São Paulo, Brazil
dc.format.extent437-443
dc.identifierhttp://dx.doi.org/10.1590/S1516-14392010000400004
dc.identifier.citationMaterials Research-ibero-american Journal of Materials. São Carlos: Universidade Federal de São Carlos (UFSCar), Dept Engenharia Materials, v. 13, n. 4, p. 437-443, 2010.
dc.identifier.fileS1516-14392010000400004-en.pdf
dc.identifier.issn1516-1439
dc.identifier.lattes7730719476451232
dc.identifier.lattes6284168579617066
dc.identifier.orcid0000-0001-5762-6424
dc.identifier.scieloS1516-14392010000400004
dc.identifier.urihttp://hdl.handle.net/11449/8497
dc.identifier.wosWOS:000287017400003
dc.language.isoeng
dc.publisherUniversidade Federal de São Carlos (UFSCar), Dept Engenharia Materials
dc.relation.ispartofMaterials Research-ibero-american Journal of Materials
dc.relation.ispartofjcr1.103
dc.relation.ispartofsjr0,398
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjecttin dioxideen
dc.subjectsot-gelen
dc.subjectthin filmsen
dc.subjectelectronic structureen
dc.subjectoptical absorptionen
dc.titleEvaluation of Bulk and Surfaces Absorption Edge Energy of Sol-Gel-Dip-Coating SnO2 Thin Filmsen
dc.typeArtigo
dcterms.licensehttp://www.scielo.br/revistas/mr/paboutj.htm
dcterms.rightsHolderUniversidade Federal de São Carlos (UFSCar), Dept Engenharia Materials
unesp.author.lattes7730719476451232[2]
unesp.author.lattes6284168579617066
unesp.author.orcid0000-0001-5762-6424[2]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências, Baurupt
unesp.departmentMatemática - FCpt

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