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Rhodanine dyes for dye-sensitized solar cells: spectroscopy, energy levels and photovoltaic performance
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Materials Science, Surface and Interface Science.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Materials Chemistry, Inorganic Chemistry. (oorganisk kemi)
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2009 (English)In: Physical Chemistry, Chemical Physics - PCCP, ISSN 1463-9076, E-ISSN 1463-9084, Vol. 11, no 1, 133-141 p.Article in journal (Refereed) Published
Abstract [en]

Three new sensitizers for photoelectrochemical solar cells were synthesized consisting of a triphenylamine donor, a rhodanine-3-acetic acid acceptor and a polyene connection. The conjugation length was systematically increased, which resulted in two effects: first, it led to a red-shift of the optical absorption of the dyes, resulting in an improved spectral overlap with the solar spectrum.Secondly, the oxidation potential decreased systematically. The excited state levels were, however, calculated to be nearly stationary. The experimental trends were in excellent agreement with density functional theory (DFT) computations. The photovoltaic performance of this set of dyes as sensitizers in mesoporous TiOredox couple. The dye with the best absorption characteristics showed the poorest solar cell efficiency, due to losses by recombination of electrons in TiOthe electrolyte led to a strongly reduced photocurrent for all dyes due to a reduced electron injection efficiency, caused by a 0.15 V negative shift of the TiO 2 solar cells was investigated using electrolytes containing the iodide/triiodide2 with triiodide. Addition of 4-tert butylpyridine to2 conduction band potential.

Place, publisher, year, edition, pages
2009. Vol. 11, no 1, 133-141 p.
National Category
Inorganic Chemistry
Research subject
Inorganic Chemistry
URN: urn:nbn:se:uu:diva-120847DOI: 10.1039/b812154kISI: 000263278900011OAI: oai:DiVA.org:uu-120847DiVA: diva2:304030
Available from: 2010-03-16 Created: 2010-03-16 Last updated: 2016-04-20Bibliographically approved

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Edvinsson, TomasBoschloo, GerritRensmo, HåkanHagfeldt, Anders
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Surface and Interface ScienceInorganic ChemistryPhysical Chemistry
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