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On the correlation between dye coverage and photoelectrochemical performance in dye-sensitized solar cells
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Applied Physical Chemistry.
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Applied Physical Chemistry.
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2014 (English)In: Physical Chemistry, Chemical Physics - PCCP, ISSN 1463-9076, E-ISSN 1463-9084, Vol. 16, no 2, 711-718 p.Article in journal (Refereed) Published
Abstract [en]

Concentration depth profiles of the ruthenium based dyes Z907 and N719 adsorbed onto titania are measured directly and used for determining the adsorption isotherm of the dyes. Dye layers formed by both grow in islands on the titania which do not cover the entire titania surface even at the maximum coverage. Impedance spectroscopy in conjunction with the adsorption isotherms shows that recombination losses mainly appear between the dye and the electrolyte solution. The short circuit current and the efficiency increase linearly with the dye coverage. The open circuit voltage slightly increases with increasing dye coverage which is interpreted as most likely to be a consequence of the higher charge in the particles upon higher dye loading on the TiO2 surface.

Place, publisher, year, edition, pages
2014. Vol. 16, no 2, 711-718 p.
Keyword [en]
Anocrystalline Tio2, N719 Dye, Electron Injection, Adsorption, Recombination, Spectroscopy, Efficiency, Films, Complexes, Molecules
National Category
Physical Sciences Chemical Sciences
URN: urn:nbn:se:kth:diva-139265DOI: 10.1039/c3cp52486hISI: 000327888100039ScopusID: 2-s2.0-84890038355OAI: diva2:685366
Swedish Research CouncilSwedish Energy AgencyKnut and Alice Wallenberg Foundation

QC 20140109

Available from: 2014-01-09 Created: 2014-01-08 Last updated: 2014-01-09Bibliographically approved

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Johansson, ViktorGorlov, MikhailKloo, Lars
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