Nano Archive

Sensitization of Nanostructured TiO2 by Electostatic Coupling of Ionic Dyes to Ionic Absorbates

Pitigala , P. K. and Seneviratne , M. K. and Perera , V. P. and Tennakone, K. (2004) Sensitization of Nanostructured TiO2 by Electostatic Coupling of Ionic Dyes to Ionic Absorbates. Langmuir,, 20 (12). pp. 5100-5103. ISSN

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Official URL: http://www.labmeeting.com/paper/25926603/pitigala-...

Abstract

It is shown that an ionic dye Y can be electrostatically bonded to an ionic molecule X of opposite charge anchored to a TiO2 surface via suitable ligands. Dye-sensitized solid-state photovoltaic cells of the configuration n-TiO2/X-Y/p-CuSCN were constructed with X = trihydroxybenzoic acid or mercurochrome and Y = methyl violet. Cells of this configuration were found to be more efficient and delivered higher short-circuit photocurrents and open-circuit photovoltages compared to the cells based only on methyl violet or mercurochrome. It is suggested that this technique would be a means of extending the spectral response of dye-sensitized photovoltaic devices. The formation of a wider barrier by coupling of anionic and cationic species also improves the cell performance by suppression of recombination.

Item Type:Article
Subjects:Physical Science > Nanophysics
Physical Science > Nano objects
Material Science > Nanochemistry
Material Science > Nanostructured materials
Divisions:Faculty of Engineering, Science and Mathematics > School of Physics
Faculty of Engineering, Science and Mathematics > School of Chemistry
ID Code:7166
Deposited By:JNCASR
Deposited On:28 Oct 2009 05:21
Last Modified:28 Oct 2009 05:21

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