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The effect of UV-irradiation (under short-circuit condition) on dye-sensitized solar cells sensitized with a Ru-complex dye functionalized with a (diphenylamino)styryl-thiophen group
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2009 (English)In: International Journal of Photoenergy (Online), ISSN 1110-662X, E-ISSN 1687-529X, no 471828Article in journal (Refereed) Published
Abstract [en]

A new ruthenium complex, cis-di(thiocyanato)(2,2'-bipyridine-4,4'-dicarboxylic acid)(4,4'-bis(2-(5-(2-(4-diphenylaminophenyl) ethenyl)-thiophen-2-yl)ethenyl)-2,2'-bipyridine)ruthenium(II) (named E322) has been synthesized for use in dye-sensitized solar cells (DSCs). Higher extinction coeff. and a broader absorption compared to the std. Ru-dye, N719, were aimed. DSCs were fabricated with E322, and the efficiency was 0.12% initially (4.06% for N719, as ref.). The efficiency was enhanced to 1.83% by exposing the cell under simulated sunlight contg. UV-irradn. at short-circuit condition. The reasons of this enhancement are (1) enhanceing electron injection from sensitizer to TiO2 following a shift toward pos. potentials of the conduction band of TiO2 by the adsorption of protons or cations from the sensitizer, or from the redox electrolyte and (2) improving the regeneration reaction of the oxidized dye by the redox electrolyte by the dissoln. of aggregated dye from the surface of TiO2 following the treatment.

Place, publisher, year, edition, pages
2009. no 471828
National Category
Chemical Sciences
Research subject
Physical Chemistry
URN: urn:nbn:se:uu:diva-107924DOI: 10.1155/2009/471828ISI: 000270536900001OAI: oai:DiVA.org:uu-107924DiVA: diva2:233330
Available from: 2009-08-31 Created: 2009-08-31 Last updated: 2011-08-22Bibliographically approved

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Nonomura, KazuteruBoschloo, GerritHagfeldt, Anders
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