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http://dx.doi.org/10.5012/bkcs.2008.29.2.463

Method to Increase the Surface Area of Titania Films and Its Effects on the Performance of Dye-Sensitized Solar Cells  

Ko, Young-Seon (SKKU Advanced Institute of Nanotechnology, Sungkyunkwan University)
Kim, Min-Hye (Department of Chemistry, BK-21 School of Chemical Materials Science, Sungkyunkwan University)
Kwon, Young-Uk (SKKU Advanced Institute of Nanotechnology, Sungkyunkwan University)
Publication Information
Bulletin of the Korean Chemical Society / v.29, no.2, 2008 , pp. 463-466 More about this Journal
Abstract
We report a method to increase the surface area of the titania films used as the anodes of dye-sensitized solar cells (DSSCs) by applying additional titania-coating. The modification was achieved by spin-coating a coating solution that contained a surfactant with a titania source onto the titania electrodes, followed by calcination. Previous similar attempts without a surfactant all reported decreased surface areas. We fabricated DSSCs by using the modified titania films as the anode and measured their performances. The increased surface area increased the amount of adsorbed dyes, which resulted in increased current densities. At the same time, the titania-coating increased both the open-circuit voltage and the current density by reducing the charge-recombination rates of the injected electrons, similar to the results of literatures. Therefore, our method shows an additional mechanism to increase the current density of DSSCs in addition to the other mechanisms of surface modifications with titania-coatings.
Keywords
Dye-sensitized solar cell; Titania-coating; Surface modification
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
Times Cited By Web Of Science : 6  (Related Records In Web of Science)
Times Cited By SCOPUS : 6
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