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A mathematical model for interfacial charge transfer at the semiconductor–dye–electrolyte interface of a dye-sensitised solar cell

Record type: Article

A mathematical model for the interfacial charge transfer within dye-sensitised solar cells (DSC) is presented for the semiconductor–dye–electrolyte interface. The model explicitly accounts for each reaction at the interface involving dye molecules, electrolyte species and adsorbed electrons associated with the conduction band surface states of the semiconductor. Additionally, the model accounts for photoelectron injection via singlet and triplet excited dye states. The governing equations can be used to describe the total current produced by the DSC under illuminated and non-illuminated conditions, at steady state. Regular perturbation methods are applied to the model equations to obtain closed form analytic approximations, resulting in approximate solutions that negate the need for numerical solution of the model system. All parameter values associated with the model are obtained from the literature and from experimental data. The presented numerical results and analytic approximations compare favourably to experimental data, capturing the interfacial characteristics of current versus voltage curves of the DSC.

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Citation

Penny, Melissa, Farrell, Troy and Please, Colin (2008) A mathematical model for interfacial charge transfer at the semiconductor–dye–electrolyte interface of a dye-sensitised solar cell Solar Energy Materials and Solar Cells, 92, (1), pp. 11-23. (doi:10.1016/j.solmat.2007.07.013).

More information

Published date: January 2008
Keywords: dye-sensitised solar cells, interfacial charge transfer, mathematical modelling

Identifiers

Local EPrints ID: 146629
URI: http://eprints.soton.ac.uk/id/eprint/146629
ISSN: 0927-0248
PURE UUID: 173fe10e-da5a-43a3-8eb1-890f43ec8f32

Catalogue record

Date deposited: 28 Apr 2010 08:35
Last modified: 18 Jul 2017 23:03

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Contributors

Author: Melissa Penny
Author: Troy Farrell
Author: Colin Please

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