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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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.uri http://hdl.handle.net/10550/12831
dc.language.iso en en
dc.relation http://scitation.aip.org/getpdf/servlet/GetPDFServlet?filetype=pdf&id=JAPIAU000096000011006903000001&idtype=cvips&prog=normal&doi=10.1063/1.1812588 en
dc.source 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.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 info:eu-repo/semantics/article en
dc.type info:eu-repo/semantics/publishedVersion en
dc.subject.unesco UNESCO::FÍSICA en
dc.identifier.doi 10.1063/1.1812588 en
dc.description.abstractenglish 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
dc.description.private emilio.palomares@uv.es en
dc.identifier.idgrec 015320 en

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