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The origin of slow electron recombination processes in dye-sensitized solar cells with alumina barrier coatings

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The origin of slow electron recombination processes in dye-sensitized solar cells with alumina barrier coatings

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dc.contributor.author	Fabregat-Santiago, Francisco
dc.contributor.author	Palomares Gil, Emilio
dc.contributor.author	Clifford, John N.
dc.contributor.author	Haque, Saif A.
dc.contributor.author	Durrant, James R.
dc.contributor.author	García Belmonte, Germà
dc.contributor.author	Bisquert, Juan
dc.contributor.author	García-Cañadas, Jorge
dc.date.accessioned	2010-06-02T10:38:34Z
dc.date.available	2010-06-02T10:38:34Z
dc.date.issued	2004
dc.identifier.citation	FABREGAT-SANTIAGO, Francisco ; GARCÍA-CAÑADAS, Jorge ; PALOMARES, Emilio ; CLIFFORD, John N. ; HAQUE, Saif A. ; DURRANT, James R. ; GARCÍA-BELMONTE, Germà ; BISQUERT, Juan. The origin of slow electron recombination processes in dye-sensitized solar cells with alumina barrier coatings. En: Journal of Applied Physics, 2004, vol. 96	en
dc.identifier.uri	http://hdl.handle.net/10550/12831
dc.description.abstract	We investigate the effect of a thin alumina coating of nanocrystalline TiO2 films on recombination dynamics of dye-sensitized solar cells. Both coated and uncoated cells were measured by a combination of techniques: transient absorption spectroscopy, electrochemical impedance spectroscopy, and open-circuit voltage decay. It is found that the alumina barrier reduces the recombination of photoinjected electrons to both dye cations and the oxidized redox couple. It is proposed that this observed retardation can be attributed primarily to two effects: almost complete passivation of surface trap states in TiO2 that are able to inject electrons to acceptor species, and slowing down by a factor of 3–4 the rate of interfacial charge transfer from conduction-band states.	en_US
dc.language.iso	en	en
dc.subject	Titanium compounds ; Alumina ; Nanostructured materials ; Semiconductor materials ; Thin films ; Solar cells ; Ion recombination ; Dyes ; Charge exchange ; Charge transfer states ; Charge injection ; Electrochemical impedance spectroscopy ; Time resolved spectra	en
dc.title	The origin of slow electron recombination processes in dye-sensitized solar cells with alumina barrier coatings	en
dc.type	journal article	es_ES
dc.subject.unesco	UNESCO::FÍSICA	en
dc.identifier.doi	10.1063/1.1812588	en
dc.identifier.idgrec	015320	en
dc.type.hasVersion	VoR	es_ES
dc.identifier.url	http://scitation.aip.org/getpdf/servlet/GetPDFServlet?filetype=pdf&id=JAPIAU000096000011006903000001&idtype=cvips&prog=normal&doi=10.1063/1.1812588	en