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Co and (Co,Mo) doping effects on the properties of highly reduced TiO2 anatase thin films

2017-02Journal article Restricted access
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dc.contributor.authorSilvestre, António Jorge
dc.contributor.authorRout, S.
dc.contributor.authorDalui, S.
dc.contributor.authorPereira, Laura
dc.contributor.authorViana, Ana
dc.contributor.authorConde, Olinda
dc.date.accessioned2016-12-21T10:34:46Z
dc.date.available2016-12-21T10:34:46Z
dc.date.issued2017-02
dc.description.abstractThis work reports on the structural, optical, electrical and magnetic properties of Co:TiO2 and (Co,Mo):TiO2 anatase thin films grown onto (0001) sapphire substrates by Pulsed Laser Deposition in highly reducing conditions and at a low temperature of 350 _C. Undoped TiO2_d as well as doped films with nominal compositions of Ti0.95Co0.05O2_d, Ti0.94Co0.05Mo0.01O2_d, and Ti0.92Co0.05Mo0.03O2_d were studied. They all show similar microstructures, with smooth surfaces and RMS roughness values less than 0.5 nm. The optical band gap energies of the doped films are red shifted with respect to that deduced for the undoped TiO2_d. The correlation between the band gaps and the Urbach energies of the films is discussed. All samples show semiconductor behavior with n-type conduction. The Co:TiO2 sample is ferromagnetic with a saturation magnetization of 1.3 mB/Co, a high electrical conductivity of 123 S cm_1 and a carrier density of 1.88 _ 1021 cm_3 at room temperature. The ferromagnetic order of the Co:TiO2 system is suppressed when carriers are added by codoping with Mo.pt_PT
dc.description.versioninfo:eu-repo/semantics/acceptedVersionpt_PT
dc.identifier.citationSILVESTRE, A. J.; [et al] - Co and (Co,Mo) doping effects on the properties of highly reduced TiO2 anatase thin films. Current Applied Physics. ISSN 1567-1739. Vol. 17, N.º 2 (2017), pp. 174-180pt_PT
dc.identifier.doihttp://dx.doi.org/10.1016/j.cap.2016.11.015pt_PT
dc.identifier.issn1567-1739
dc.identifier.urihttp://hdl.handle.net/10400.21/6639
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relation.publisherversionhttp://www.sciencedirect.com/science/article/pii/S1567173916303303pt_PT
dc.subjectPulsed laser depositionpt_PT
dc.subjectCo-doped TiO2_d thin filmspt_PT
dc.subjectMo codopingpt_PT
dc.subjectOxide based DMSpt_PT
dc.titleCo and (Co,Mo) doping effects on the properties of highly reduced TiO2 anatase thin filmspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage180pt_PT
oaire.citation.issue2pt_PT
oaire.citation.startPage174pt_PT
oaire.citation.titleCurrent Applied Physicspt_PT
oaire.citation.volume17pt_PT
person.familyNameSilvestre
person.familyNamePereira
person.familyNameViana
person.familyNameConde
person.givenNameAntónio Jorge
person.givenNameLaura
person.givenNameAna
person.givenNameOlinda
person.identifier.ciencia-id5317-7110-E52E
person.identifier.ciencia-idB114-FD5F-2C7B
person.identifier.orcid0000-0001-6517-6275
person.identifier.orcid0000-0002-8818-0039
person.identifier.orcid0000-0001-8405-9672
person.identifier.orcid0000-0003-0413-1967
person.identifier.ridG-3579-2013
person.identifier.ridD-7048-2012
person.identifier.ridA-2321-2011
person.identifier.scopus-author-id25224208600
person.identifier.scopus-author-id7201962472
person.identifier.scopus-author-id7007140974
person.identifier.scopus-author-id7005302308
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationda27d795-d2eb-4f8c-bfa5-7053ef20f339
relation.isAuthorOfPublication58e0bfa5-881b-41e7-b962-a893ffa7ce9e
relation.isAuthorOfPublicationb3158569-e54c-45cf-94ee-7357ec73145d
relation.isAuthorOfPublication3ef22430-3b22-45fa-ad31-e13284b38d8f
relation.isAuthorOfPublication.latestForDiscoveryda27d795-d2eb-4f8c-bfa5-7053ef20f339

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