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Incorporation of a fluorophenylene spacer into a highly efficient organic dye for solid-state dye-sensitized solar cells
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Molecular Biomimetics.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Physical Chemistry.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Molecular Biomimetics.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Physical Chemistry.
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2016 (English)In: Journal of Photochemistry and Photobiology A: Chemistry, ISSN 1010-6030, E-ISSN 1873-2666, Vol. 328, 59-65 p.Article in journal (Refereed) Published
Abstract [en]

A new efficient organic dye LEG4F, incorporating a fluorine-substituted phenylene unit in the π-spacer, has been synthesized and tested in dye-sensitized solar cells. Direct comparison with the parent dye LEG4 shows very similar performances in case of liquid electrolyte devices based on iodide/triiodide, yielding a power conversion efficiency of 6.8% under 1 sun and 8.0–8.2% under 0.5 sun illumination. However, LEG4F outperforms its fluorine-free analogue when the liquid electrolyte is replaced by the solid-state hole-transport material Spiro-OMeTAD, reaching 5.3% efficiency compared to 4.8% achieved by LEG4. We show that this improvement is due to the enhancement of the electron lifetime, which reduces recombination at the TiO2/dye/Spiro-OMeTAD interfaces.

Place, publisher, year, edition, pages
2016. Vol. 328, 59-65 p.
Keyword [en]
Dye sensitized solar cells; Organic dyes; Fluorine dyes
National Category
Physical Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-300747DOI: 10.1016/j.jphotochem.2016.05.015ISI: 000381165200008OAI: oai:DiVA.org:uu-300747DiVA: diva2:952253
Funder
Carl Tryggers foundation Knut and Alice Wallenberg FoundationSwedish Research Council
Available from: 2016-08-12 Created: 2016-08-12 Last updated: 2016-10-04Bibliographically approved

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