Quantification of the Effects of Recombination and Injection in the Performance of Dye-Sensitized Solar Cells Based on N-Substituted Carbazole Dyes

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dc.contributor.authorBarea, Eva M.
dc.contributor.authorZafer, Ceylan
dc.contributor.authorGultekin, Burak
dc.contributor.authorAydin, Banu
dc.contributor.authorKoyuncu, Sermet
dc.contributor.authorIcli, Siddik
dc.contributor.authorFabregat Santiago, Francisco
dc.contributor.authorBisquert, Juan
dc.date.accessioned2019-10-27T21:29:40Z
dc.date.available2019-10-27T21:29:40Z
dc.date.issued2010
dc.departmentEge Üniversitesien_US
dc.description.abstractTwo new sensitizers for dye sensitized solar cells have been designed consisting of thiophene units asymmetrically functionalized by N-aryl carbazole. The di(tert-butyl) carbazole moieties acts as an electron donor group, the thiophene chain as a bridge group, and the cyanoacrylic acid as an anchoring and electron acceptor group. An increase of the conjugation length produces two main effects: first, it leads to a red-shift of the optical absorption of the dyes, resulting in an improved overlap of the absorption with the solar spectrum. Second, the oxidation potential decreases. The photovoltaic performance of this set of dyes as sensitizers in mesoporous TiO2 solar cells was investigated using electrolytes containing the iodide/triiodide redox couple. The dye with the best absorption characteristics showed the highest photocurrent but lower open circuit voltage due to more losses by recombination. A trend between structure (molecule dyes size) and recombination is demostrated using an analysis procedure based on beta-recombination model that combines impedance spectroscopy and density current-voltage data.en_US
dc.description.sponsorshipMinisterio de Ciencia e InnovacionMinistry of Science and Innovation, Spain (MICINN) [CSD2007-00007, MAT2007-62982]; Generalitat ValencianaGeneralitat Valenciana [PROMETEO/2009/058]; State Planning Organization of Turkey (DPT)en_US
dc.description.sponsorshipWe are thankful for financial support from Ministerio de Ciencia e Innovacion under Projects HOPE CSD2007-00007 and MAT2007-62982 and Generalitat Valenciana under Project PROMETEO/2009/058. We also acknowledge financial support from State Planning Organization of Turkey (DPT).en_US
dc.identifier.doi10.1021/jp1055842
dc.identifier.endpage19848en_US
dc.identifier.issn1932-7447
dc.identifier.issue46en_US
dc.identifier.startpage19840en_US
dc.identifier.urihttps://doi.org/10.1021/jp1055842
dc.identifier.urihttps://hdl.handle.net/11454/45302
dc.identifier.volume114en_US
dc.identifier.wosWOS:000284287900040en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.language.isoenen_US
dc.publisherAmer Chemical Socen_US
dc.relation.ispartofJournal of Physical Chemistry Cen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.titleQuantification of the Effects of Recombination and Injection in the Performance of Dye-Sensitized Solar Cells Based on N-Substituted Carbazole Dyesen_US
dc.typeArticleen_US

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