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Charge transport and recombination of dye sensitized 1D nanostructured-TiO2 films prepared by reactive sputtering

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dc.contributor.authorSequeira, S.
dc.contributor.authorLobato, K.
dc.contributor.authorTorres, Erica
dc.contributor.authorBrites, Maria João
dc.contributor.authorBarreiros, M. Alexandra
dc.contributor.authorMascarenhas, João
dc.date.accessioned2015-01-07T16:37:16Z
dc.date.available2015-01-07T16:37:16Z
dc.date.issued2014
dc.description.abstractDye sensitized solar cells (DSCs) are governed by light absorption, charge injection, electron transport and recombination and electrolyte diffusion. One way to improve the efficiency of these devices is by the design of highly ordered nanostructured semiconductor materials.The advantages can be two-fold: Firstly charge transport within the metal-oxide can be enhanced and hence thicker films can be employed and secondly, the complete permeation with a solid-state hole-transport medium of the sensitized metal-oxide can be facilitated. Nanostructured materials should promote vectorial electron diffusion and have as few recombination sights as possible so as to further enhance electron lifetimes and electron collection efficiencies. These materials should also have a high surface area so as to allow for efficient dye-loading and hence light absorption. Highly ordered TiO2 nanostructured films were prepared by reactive sputtering and their charge transport characteristics evaluated in DSCs. These were compared to DSCs employing mesoporous TiO2 films prepared by doctor blade technique using commercial paste. Charge transport characteristics were evaluated by impedance spectroscopy (IS), incident photon to current conversion efficiencies (IPCE) and current-voltage (iV) curves under simulated AM1.5G irradiation. Film morphology and structural properties were evaluated by scanning electron microscopy (SEM) and X-ray diffraction (XRD), respectively.por
dc.identifier.citationSequeira, S.; Lobato, K.; Torres, E.; Brites, M.J.; Barreiros, M.A.; Mascarenhas, J. - Charge transport and recombination of dye sensitized 1D nanostructured-TiO2 films prepared by reactive sputtering. In: HOPV2014 - 6th International Conference on Hybrid and Organic Photovoltaics, Book of Abstracts, Lausanne, Switzerland, 11-14 May, 2014, 2 p.por
dc.identifier.urihttp://hdl.handle.net/10400.9/2565
dc.language.isoengpor
dc.relation.publisherversionhttp://www.nanoge.org/HOPV14/index.phppor
dc.subjectSolar cellspor
dc.subjectElectrochemical propertiespor
dc.subjectDyespor
dc.subjectSputteringpor
dc.subjectNanostructured materialspor
dc.titleCharge transport and recombination of dye sensitized 1D nanostructured-TiO2 films prepared by reactive sputteringpor
dc.typeconference object
dspace.entity.typePublication
oaire.citation.conferencePlaceLausanne, Switzerlandpor
oaire.citation.titleHOPV2014 - 6th International Conference on Hybrid and Organic Photovoltaicspor
person.familyNameBrites
person.familyNameBarreiros
person.familyNameMascarenhas
person.givenNameMaria João de Sousa
person.givenNameMaria Alexandra
person.givenNameJoão
person.identifierL-4674-2014
person.identifier.ciencia-id6710-13F6-3011
person.identifier.ciencia-id271D-7B29-E46C
person.identifier.ciencia-idCF18-4E59-B6B9
person.identifier.orcid0000-0002-1081-7191
person.identifier.orcid0000-0002-0132-4969
person.identifier.orcid0000-0003-0440-8057
person.identifier.ridL-3318-2014
person.identifier.scopus-author-id6603680496
rcaap.rightsopenAccesspor
rcaap.typeconferenceObjectpor
relation.isAuthorOfPublicationafcf1d4c-fc7e-4486-b0f4-58f27acc6834
relation.isAuthorOfPublication3b1e7d6a-3232-443e-a747-f442427dc57a
relation.isAuthorOfPublication1b345025-eb12-4019-ab1c-e7b3b23962a8
relation.isAuthorOfPublication.latestForDiscoveryafcf1d4c-fc7e-4486-b0f4-58f27acc6834

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