Evaluation of bulk and surfaces absorption edge energy of sol-gel-dip-coating SnO2 thin films

Detalhes bibliográficos
Autor(a) principal: Floriano, Emerson Aparecido [UNESP]
Data de Publicação: 2010
Outros Autores: De Andrade Scalvi, Luis Vicente [UNESP], Sambrano, Julio Ricardo [UNESP], Geraldo, Viviany [UNESP]
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1590/S1516-14392010000400004
http://hdl.handle.net/11449/226216
Resumo: The 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.
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spelling Evaluation of bulk and surfaces absorption edge energy of sol-gel-dip-coating SnO2 thin filmsElectronic structureOptical absorptionSol-gelThin flmsTin dioxideThe 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.Advanced Materials Group and Defects in Semiconductors and Insulators Group State University of São Paulo - UNESP, CP 473, CEP 17033-360, Bauru, São PauloDepartment of Physics - FC State University of São Paulo - UNESP, CP 473, CEP 17033-360, Bauru, São PauloModeling and Molecular Simulation Group - DM / FC State University of São Paulo - UNESP, CP 473, CEP 17033-360, Bauru, São PauloLaboratory of Nanomaterials Federal University of Minas Gerais - UFMG, CEP 31270-901, Belo Horizonte, MGAdvanced Materials Group and Defects in Semiconductors and Insulators Group State University of São Paulo - UNESP, CP 473, CEP 17033-360, Bauru, São PauloDepartment of Physics - FC State University of São Paulo - UNESP, CP 473, CEP 17033-360, Bauru, São PauloModeling and Molecular Simulation Group - DM / FC State University of São Paulo - UNESP, CP 473, CEP 17033-360, Bauru, São PauloUniversidade Estadual Paulista (UNESP)Universidade Federal de Minas Gerais (UFMG)Floriano, Emerson Aparecido [UNESP]De Andrade Scalvi, Luis Vicente [UNESP]Sambrano, Julio Ricardo [UNESP]Geraldo, Viviany [UNESP]2022-04-28T22:02:11Z2022-04-28T22:02:11Z2010-10-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article437-443http://dx.doi.org/10.1590/S1516-14392010000400004Materials Research, v. 13, n. 4, p. 437-443, 2010.1516-1439http://hdl.handle.net/11449/22621610.1590/S1516-143920100004000042-s2.0-79551702998Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengMaterials Researchinfo:eu-repo/semantics/openAccess2024-04-25T17:39:20Zoai:repositorio.unesp.br:11449/226216Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T14:01:32.686926Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Evaluation of bulk and surfaces absorption edge energy of sol-gel-dip-coating SnO2 thin films
title Evaluation of bulk and surfaces absorption edge energy of sol-gel-dip-coating SnO2 thin films
spellingShingle Evaluation of bulk and surfaces absorption edge energy of sol-gel-dip-coating SnO2 thin films
Floriano, Emerson Aparecido [UNESP]
Electronic structure
Optical absorption
Sol-gel
Thin flms
Tin dioxide
title_short Evaluation of bulk and surfaces absorption edge energy of sol-gel-dip-coating SnO2 thin films
title_full Evaluation of bulk and surfaces absorption edge energy of sol-gel-dip-coating SnO2 thin films
title_fullStr Evaluation of bulk and surfaces absorption edge energy of sol-gel-dip-coating SnO2 thin films
title_full_unstemmed Evaluation of bulk and surfaces absorption edge energy of sol-gel-dip-coating SnO2 thin films
title_sort Evaluation of bulk and surfaces absorption edge energy of sol-gel-dip-coating SnO2 thin films
author Floriano, Emerson Aparecido [UNESP]
author_facet Floriano, Emerson Aparecido [UNESP]
De Andrade Scalvi, Luis Vicente [UNESP]
Sambrano, Julio Ricardo [UNESP]
Geraldo, Viviany [UNESP]
author_role author
author2 De Andrade Scalvi, Luis Vicente [UNESP]
Sambrano, Julio Ricardo [UNESP]
Geraldo, Viviany [UNESP]
author2_role author
author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (UNESP)
Universidade Federal de Minas Gerais (UFMG)
dc.contributor.author.fl_str_mv Floriano, Emerson Aparecido [UNESP]
De Andrade Scalvi, Luis Vicente [UNESP]
Sambrano, Julio Ricardo [UNESP]
Geraldo, Viviany [UNESP]
dc.subject.por.fl_str_mv Electronic structure
Optical absorption
Sol-gel
Thin flms
Tin dioxide
topic Electronic structure
Optical absorption
Sol-gel
Thin flms
Tin dioxide
description The 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.
publishDate 2010
dc.date.none.fl_str_mv 2010-10-01
2022-04-28T22:02:11Z
2022-04-28T22:02:11Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.1590/S1516-14392010000400004
Materials Research, v. 13, n. 4, p. 437-443, 2010.
1516-1439
http://hdl.handle.net/11449/226216
10.1590/S1516-14392010000400004
2-s2.0-79551702998
url http://dx.doi.org/10.1590/S1516-14392010000400004
http://hdl.handle.net/11449/226216
identifier_str_mv Materials Research, v. 13, n. 4, p. 437-443, 2010.
1516-1439
10.1590/S1516-14392010000400004
2-s2.0-79551702998
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Materials Research
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 437-443
dc.source.none.fl_str_mv Scopus
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
_version_ 1808128306062557184

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