An expression for the bridge-mediated electron transfer rate in dye-sensitized solar cells

We have derived an expression for the rate of electron transfer between a semiconductor and a redox centre connected to the semiconductor via a molecular bridge. This model is particularly useful to study the charge recombination (CR) process in dye-sensitized solar cells, where the dye is often con...

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Bibliographic Details
Published in:Philosophical transactions of the Royal Society of London. Series A: Mathematical, physical, and engineering sciences physical, and engineering sciences, 2014-04, Vol.372 (2013), p.1-13
Main Authors: Maggio, Emanuele, Troisi, Alessandro
Format: Article
Language:English
Subjects:
Chromophores
Conduction bands
Dyes
Electron transfer
Electrons
Greens function
Molecules
Photovoltaic cells
Semiconductors
Spectral energy distribution
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Summary:We have derived an expression for the rate of electron transfer between a semiconductor and a redox centre connected to the semiconductor via a molecular bridge. This model is particularly useful to study the charge recombination (CR) process in dye-sensitized solar cells, where the dye is often connected to the semiconductor by a conjugated bridge. This formalism, designed to be coupled with density functional theory electronic structure calculations, can be used to explore the effect of changing the bridge on the rate of interfacial electron transfer. As an example, we have evaluated the CR rate for a series of systems that differ in the bridge length.
ISSN:1364-503X