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

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorFloriano, Emerson Aparecido
dc.creatorScalvi, Luis Vicente de Andrade
dc.creatorSambrano, Julio Ricardo
dc.creatorGeraldo, Viviany
dc.date2014-05-20T13:26:22Z
dc.date2014-05-20T13:26:22Z
dc.date2010-10-01
dc.date.accessioned2017-04-05T20:05:24Z
dc.date.available2017-04-05T20:05:24Z
dc.identifierMaterials 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.identifier1516-1439
dc.identifierhttp://hdl.handle.net/11449/8497
dc.identifierS1516-14392010000400004
dc.identifierWOS:000287017400003
dc.identifierS1516-14392010000400004-en.pdf
dc.identifierhttp://dx.doi.org/10.1590/S1516-14392010000400004
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/856853
dc.descriptionThe 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.
dc.languageeng
dc.publisherUniversidade Federal de São Carlos (UFSCar), Dept Engenharia Materials
dc.relationMaterials Research-ibero-american Journal of Materials
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjecttin dioxide
dc.subjectsot-gel
dc.subjectthin films
dc.subjectelectronic structure
dc.subjectoptical absorption
dc.titleEvaluation of Bulk and Surfaces Absorption Edge Energy of Sol-Gel-Dip-Coating SnO2 Thin Films
dc.typeOtro


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