Coumarin derivatives for dye sensitized solar cells: a TD-DFT study

Time dependent density functional theory (TD-DFT) calculations have been carried out to study the electronic structure and the optical properties of five coumarin based dyes: C343, NKX-2311, NKX-2586, NKX-2753 and NKX-2593. We have found out that the position and width of the first band in the elect...

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Bibliographic Details
Published in:Physical chemistry chemical physics : PCCP 2012-01, Vol.14 (1), p.225-233
Main Authors: Sánchez-de-Armas, Rocío, San Miguel, Miguel Ángel, Oviedo, Jaime, Sanz, Javier Fdez
Format: Article
Language:English
Subjects:
Coumarin
Criteria
Derivatives
Dyes
Electronics
Order disorder
Photovoltaic cells
Solar cells
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Summary:Time dependent density functional theory (TD-DFT) calculations have been carried out to study the electronic structure and the optical properties of five coumarin based dyes: C343, NKX-2311, NKX-2586, NKX-2753 and NKX-2593. We have found out that the position and width of the first band in the electronic absorption spectra, the absorption threshold and the LUMO energy with respect to the conduction band edge are key parameters in order to establish some criteria that allow evaluating the efficiency of coumarin derivatives as sensitizers in Dye Sensitized Solar Cells (DSSC). Those criteria predict the efficiency ordering for the coumarin series in good agreement with the experimental evidence. Presumably, they might be used in the design of new efficient organic based DSSC.
ISSN:1463-9076
1463-9084
DOI:10.1039/c1cp22058f