On the correlation between dye coverage and photoelectrochemical performance in dye-sensitized solar cells
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Date
2013-06-14
Authors
Johansson, Viktor
Ellsi-Gibbings, Lilian
Clarke, Trevor
Gorlov, Mikhail
Andersson, Gunther
Kloo, Lars
Journal Title
Journal ISSN
Volume Title
Publisher
Royal Society of Chemistry
Rights
This journal is © the Owner Societies 2014
Rights Holder
The Owner Societies 2014
Abstract
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.
Description
This article is licensed under a Creative Commons Attribution 3.0 Unported Licence (http://creativecommons.org/licenses/by/3.0/)
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Citation
Johansson, V., Ellis-Gibbings, L., Clarke, T., Gorlov, M., Andersson, G. and Kloo, L. (2014). On the correlation between dye coverage and photoelectrochemical performance in dye-sensitized solar cells. Physical Chemistry Chemical Physics, 16(2) pp. 711-718.