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

Sequeira, S.; Lobato, K.; Torres, Erica; Brites, Maria João; Barreiros, M. Alexandra; Mascarenhas, João

Publication

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

2014Conference object

dc.contributor.author	Sequeira, S.
dc.contributor.author	Lobato, K.
dc.contributor.author	Torres, Erica
dc.contributor.author	Brites, Maria João
dc.contributor.author	Barreiros, M. Alexandra
dc.contributor.author	Mascarenhas, João
dc.date.accessioned	2015-01-07T16:37:16Z
dc.date.available	2015-01-07T16:37:16Z
dc.date.issued	2014
dc.description.abstract	Dye 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.citation	Sequeira, 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.uri	http://hdl.handle.net/10400.9/2565
dc.language.iso	eng	por
dc.relation.publisherversion	http://www.nanoge.org/HOPV14/index.php	por
dc.subject	Solar cells	por
dc.subject	Electrochemical properties	por
dc.subject	Dyes	por
dc.subject	Sputtering	por
dc.subject	Nanostructured materials	por
dc.title	Charge transport and recombination of dye sensitized 1D nanostructured-TiO2 films prepared by reactive sputtering	por
dc.type	conference object
dspace.entity.type	Publication
oaire.citation.conferencePlace	Lausanne, Switzerland	por
oaire.citation.title	HOPV2014 - 6th International Conference on Hybrid and Organic Photovoltaics	por
person.familyName	Brites
person.familyName	Barreiros
person.familyName	Mascarenhas
person.givenName	Maria João de Sousa
person.givenName	Maria Alexandra
person.givenName	João
person.identifier	L-4674-2014
person.identifier.ciencia-id	6710-13F6-3011
person.identifier.ciencia-id	271D-7B29-E46C
person.identifier.ciencia-id	CF18-4E59-B6B9
person.identifier.orcid	0000-0002-1081-7191
person.identifier.orcid	0000-0002-0132-4969
person.identifier.orcid	0000-0003-0440-8057
person.identifier.rid	L-3318-2014
person.identifier.scopus-author-id	6603680496
rcaap.rights	openAccess	por
rcaap.type	conferenceObject	por
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