The role of gel electrolyte composition in the kinetics and performance of dye-sensitized solar cells

dc.creatorde Freitas, JN
dc.creatorGoncalves, AD
dc.creatorde Paoli, MA
dc.creatorDurrant, JR
dc.creatorNogueira, AF
dc.date2008
dc.dateOCT 15
dc.date2014-11-16T13:33:01Z
dc.date2015-11-26T16:22:53Z
dc.date2014-11-16T13:33:01Z
dc.date2015-11-26T16:22:53Z
dc.date.accessioned2018-03-28T23:04:18Z
dc.date.available2018-03-28T23:04:18Z
dc.identifierElectrochimica Acta. Pergamon-elsevier Science Ltd, v. 53, n. 24, n. 7166, n. 7172, 2008.
dc.identifier0013-4686
dc.identifierWOS:000258977900019
dc.identifier10.1016/j.electacta.2008.05.009
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/72376
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/72376
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/72376
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1268167
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionGel-type polymer electrolytes based on the copolymer poly(ethylene oxide-co-epichlorohydrin) and the plasticizer gamma-butyrolactone (GBL) were optimized and applied in dye-sensitized solar cells. The plasticizer added to the electrolyte allowed the dissolution of a higher concentration of salt, reaching conductivity values close to 1 mS cm(-1) for the sample prepared with 30 wt% of LiI. Raman spectroscopy confirmed polyiodide formation in the electrolyte when the salt concentration exceeds 7.5 wt%, introducing a significant contribution of electronic conductivity in the electrolyte. The devices were characterized under AM 1.5 conditions and the I-V curves were fitted using a two diode equation. Increasing the concentration of LiI-I-2 accelerates dye cation regeneration as measured by transient absorption spectroscopy; however, it also contributes to an increase in the dark current of the cell by one order of magnitude. The best performance was achieved for the solar cell prepared with the electrolyte containing 20wt% of LiI, with efficiencies of 3.26% and 3.49% at 100 and 10 mW cm(-2) of irradiation, respectively. (C) 2008 Elsevier Ltd. All rights reserved.
dc.description53
dc.description24
dc.description7166
dc.description7172
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionFAPESP [05/56924-0, 04/14829-8]
dc.languageen
dc.publisherPergamon-elsevier Science Ltd
dc.publisherOxford
dc.publisherInglaterra
dc.relationElectrochimica Acta
dc.relationElectrochim. Acta
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectdye-sensitized solar cells
dc.subjectDSSC
dc.subjectpolymer electrolyte
dc.subjectgel electrolyte
dc.subjectpolyiodide
dc.subjectPolycrystalline Tio2 Electrodes
dc.subjectTemperature Molten-salts
dc.subjectTitanium-dioxide Films
dc.subjectFlat-band Potentials
dc.subjectPolymer Electrolyte
dc.subjectNanocrystalline Tio2
dc.subjectSpectroscopic Determination
dc.subjectPhotoelectrochemical Cells
dc.subjectCharge Recombination
dc.subjectTriiodide Ion
dc.titleThe role of gel electrolyte composition in the kinetics and performance of dye-sensitized solar cells
dc.typeArtículos de revistas


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