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Photoanode characteristics of dye-sensitized solar cell containing TiO2 layers with different crystalline orientations

Published online by Cambridge University Press:  31 January 2011

Mamiko Kawakita ,
Jin Kawakita ,
Tetsuo Uchikoshi  and
Yoshio Sakka
Mamiko Kawakita
Affiliation:
Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba 305-0047, Japan; and Nano Ceramics Center, National Institute for Materials Science, Tsukuba 305-0047, Japan
Jin Kawakita*
Affiliation:
Composites and Coatings Center, National Institute for Materials Science, Tsukuba 305-0047, Japan
Tetsuo Uchikoshi
Affiliation:
Nano Ceramics Center, National Institute for Materials Science, Tsukuba 305-0047, Japan
Yoshio Sakka
Affiliation:
Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba 305-0047, Japan; Nano Ceramics Center, National Institute for Materials Science, Tsukuba 305-0047, Japan; and World Premier International Research Center Initiative on Materials Nanoarchitectonics, National Institute for Materials Science, Tsukuba 305-0047, Japan
*
a) Address all correspondence to this author. e-mail: KAWAKITA.Jin@nims.go.jp
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Abstract

The influence of the crystalline orientation of the TiO2 photoanode on the photo-electrochemical characteristics was investigated to reveal the primary factors responsible for improving the photoelectric conversion efficiency of a dye-sensitized solar cell. It was observed that the photocurrent depended on the plane orientation, whereas the dependence of the photopotential on the open circuit was almost constant. The rate of the photoanodic reaction was attributed to the dye adsorption, depending on the surface energy of each oriented plane of the TiO2. The cathodic reaction on TiO2 during open circuit is likely to determine the rate of the entire electrochemical reaction.

Keywords

AbsorptionElectrodepositionPhotovoltaic
Type
Articles
Information
Journal of Materials Research , Volume 24 , Issue 4 , April 2009 , pp. 1417 - 1421
Copyright
Copyright © Materials Research Society 2009

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