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Proceedings Paper

Improving the dye-sensitized solar cell
Author(s): Frank Willig
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Paper Abstract

Two dye sensitized solar cells (DSC) can be joined to form a tandem cell with two separate absorption ranges for the two different absorber materials. This can enhance the solar conversion efficiency and in particular the photovoltage of the DSC. Water splitting appears as a realistic long term target. The DSC tandem can be realized as n-n junction employing known dye molecules with optimal absorption spectra. Dye molecules with elongated shapes can be realized by covalently attaching a conducting bridge group terminated by an anchor group to a desired chromophore. Due to the long conducting bridge group separating the hole state of the dye from the surface of the semiconductor recombination is slowed down. The ordered molecular structure can be self-assembled on the recently introduced rod or cylinder shaped oxide electrodes but will not slow down recombination in the nm-cavities of the conventional TiO2 Graetzel electrode.

Paper Details

Date Published: 17 September 2007
PDF: 9 pages
Proc. SPIE 6643, Physical Chemistry of Interfaces and Nanomaterials VI, 66430F (17 September 2007); doi: 10.1117/12.734025
Show Author Affiliations
Frank Willig, Fritz-Haber-Institut der MPG (Germany)

Published in SPIE Proceedings Vol. 6643:
Physical Chemistry of Interfaces and Nanomaterials VI
Piotr Piotrowiak; Garry Rumbles, Editor(s)

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