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Issue 6, 2010
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Transparent electrodes of ordered opened-end TiO2-nanotube arrays for highly efficient dye-sensitized solar cells

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Abstract

We introduce a version of a dye-sensitized solar cell (DSSC), in which the transparent electrode comprises an opened-end TiO2-nanotube (TiNT) film oriented perpendicular to the fluorine-doped tin oxide (FTO) conductive glass. This electrode is fabricated using a facile process involving flaking the anodic TiNT film off the Ti-metal substrate to open its closed bottom and strongly adhering it onto FTO glass by a nanocrystalline TiO2 (NP-TiO2) thin underlayer. Apart from the enhanced light-harvesting and electron-collecting efficiencies, the use of opened-end TiNT film allows the redox electrolyte (iodide, Iāˆ’ and triiodide, I3āˆ’) easy access to the NP-TiO2 underlayer. As compared to the closed-end TiNT-based DSSC, the opened-end TiNT-based device exhibited an increase in one-sun efficiency from 5.3% to 9.1%, corresponding to 70% enhancement.

Graphical abstract: Transparent electrodes of ordered opened-end TiO2-nanotube arrays for highly efficient dye-sensitized solar cells

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Article information


Submitted
01 Sep 2009
Accepted
09 Nov 2009
First published
15 Dec 2009

J. Mater. Chem., 2010,20, 1073-1077
Article type
Paper

Transparent electrodes of ordered opened-end TiO2-nanotube arrays for highly efficient dye-sensitized solar cells

C. Lin, W. Yu and S. Chien, J. Mater. Chem., 2010, 20, 1073
DOI: 10.1039/B917886D

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