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1987 Fiscal Year Final Research Report Summary

Efficient conversiton of light energy by using funational semiconductor surfaces

Research Project

Project/Area Number 60470078
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 工業物理化学
Research InstitutionUniversity of Tokyo

Principal Investigator

FUJISHIMA Akira  Faculty of Engineering, University of Tokyo : Professor, 工学部, 教授 (30078307)

Co-Investigator(Kenkyū-buntansha) ITOH Kiminori  Faculty of Engineering, University of Tokyo : Associate, 工学部, 助手 (40114376)
Project Period (FY) 1985 – 1987
KeywordsLight Energy / Semiconductor / Photoelectrochemistry / 表面修飾
Research Abstract

Lihhy rnergy conversion systems based on the semiconductor liquid junctions have been focusing on fuel production as well as electrical energy generation.
When a semiconductor electrode receives photons with energy greater than its band gap, electron-hole pairs are generated within a space charge layer. In the case of an n-type semiconductor, electric field existing within the space charge layer drives photo- generated holes toward the interfacial region and electrons toward the interior of the electrode. Thus, by combining a semiconductor electrode with an appropriate counter-electrode, a photo-cell can be constructed.
The possibiliy of solar photoelectrolysis of water was demonstrated by us for the first time with a system in which an n-type titanium dioxide electrode was connected to a platinum black electorde, construction of an efficient photoelectrochemical cell in which water is decomposed to H2 and O2, as well as for the construction of an efficient regenerative photovoltaic cell in which a common redox couple is reacting at both the photoanode and the metal cathode.
Following three subjects have been studiel.
1) Increase of conversion efficiency by using semiconductor surfaces loaded with catalytic metals
2) determination of reaction sites of photocatalytic semiconductor surfaces by separation factor method
3) surface modification of semiconductor surface with chemical modification and polymer coating.

  • Research Products

    (11 results)

All Other

All Publications (11 results)

  • [Publications] 原田馨: 化学と生物. 25. 462-470 (1987)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K. Itoh;Y. Nakajima;A. Fujishima: Chemistry Letters. 2125-2128 (1987)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M. Okano;K. Itoh;A. Fujishima: Chemistry Letters. 2129-2130 (1987)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K. Itoh;R. Baba;A. Fujishima: Chemical Physics Letters. 135. 521-524 (1987)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M. Okano;K. Itoh;E. Kikuchi;A. Fujishima: J. Appl. Phys.62. 2143-2145 (1987)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] R. Baba;S. Nakabayashi;A. Fujishima;K. Honda: J. Amr. Chem. Soc.109. 2273-2277 (1987)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K. Itoh, Y. Nakajima, A. Fujishima: "Hole Transfer Rates at Illuminated <alpha>Fe2O3 Electrodes. Rate Declining in Highly Exothermic Reaction and Hole Transfer Via Surface States" Chemistry Letters. 2125-2128 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Okano, K. Itoh, A. Fujishima: "Incorporation of Dye Molecules in Polypyrrole Films in the Process of Photoelectrochemical Depodition" Chemistry Letters. 2129-2130 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K. Itoh, R. Baba, A, Fujishima: "Application of Apulsed Laser-Tnduced Photopotential Technique to the Current Doubling Process on Polycrystalline Oxide Semiconductor Electrodes" Chemical physics Letters. 135 (6). 521-524 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Okano, K. Itoh, E. Kikuchi, A. Fujishima: "Area-Selective Deposition of Organic Conducting Polymers on Semiconductor Polypyrrole-ZnO System" J. Appl. Phys.62 (5). 2143-2145 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] R. Baba, S. Nakabayashi, A. Fujishima, K. HOnda: "Photocatalytic Hydrogenation of Ethylene on the Bimetal-Deposited Semiconductor Powders" J. Amr. Chem. Soc.109. 2273-2277 (1987)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1989-03-30  

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