Surface State Passivation Effect for Nanoporous TiO2 Electrode Evaluated by Thermally Stimulated Current and Application to All-Solid State Dye-Sensitized Solar Cells
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概要
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The effect of surface state (trap) passivation of a nanoporous TiO2 electrode was examined by a thermally stimulated current method (TSC). TSC decreased after dye molecules were adsorbed or after Al2O3 thin layers were fabricated on the TiO2 electrode, suggesting that the surface trap of the TiO2 electrode was actually passivated following these surface modifications. Electron diffusion coefficient in the TiO2 electrode increased and electron recombination was retarded after the TSC peak decreased by the passivation. All-solid-type organic solar cells consisting of nanoporous TiO2/Al2O3/dye/polythiophene derivative (Cell 1) were prepared and the photovoltaic properties of Cell 1 were compared with those of Cell 2 consisting of TiO2/dye/polythiophene derivatives. By inserting the Al2O3 layer between the TiO2 layer and the dye molecule layer, we observed improvement of the photovoltaic properties.
- 2008-01-25
著者
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KADO Takashi
Kyushu Institute of Technology
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Hayase Shuzi
Kyushu Inst. Of Technol.
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Ogata Daisuke
Kyushu Institute of Technology, 2-4 Hibikino, Wakamatsu-ku, Kitakyushu 808-0196, Japan
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Kado Takashi
Kyushu Institute of Technology, 2-4 Hibikino, Wakamatsu-ku, Kitakyushu 808-0196, Japan
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Hara Yoshitaka
Kyushu Institute of Technology, 2-4 Hibikino, Wakamatsu-ku, Kitakyushu 808-0196, Japan
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Noma Yuusuke
Kyushu Institute of Technology, 2-4 Hibikino, Wakamatsu-ku, Kitakyushu 808-0196, Japan
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