Efficiency of Photocarrier Injection in a VO_2/TiO_2:Nb Heterostructure(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)

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概要

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• The efficiency of photocarrier injection in a VO_2/TiO_2:Nb heterostructure is studied by measuring I-V characteristics at room temperature under ultraviolet light irradiation. It is revealed that photogenerated hole carriers in the TiO_2:Nb substrate are injected and accumulated in the VO_2 film by the photovoltaic effect. The surface charge density is controlled successfully in a wide range of 10^9-10^<13> cm^<-2> as a function of light irradiance. The maximum hole density of 9 × 10^<18> cm^<-3> is attained at a light irradiance of 133mW/cm^2, which is estimated by assuming the uniform distribution of holes in the film. It is suggested that high efficiency can be achieved by utilizing the large dielectric constant of titanium oxide substrates.

• 社団法人日本物理学会の論文
• 2003-12-15

著者

• 広井 善二

  京都大学化学研究所

• MURAOKA Yuji

  Institute for Solid State Physics, University of Tokyo

• YAMAURA Jun-Ichi

  Institute for Solid State Physics, University of Tokyo

• HIROI Zenji

  Institute for Solid State Physics, University of Tokyo

• 広井 善二

  Institute For Solid State Physics University Of Tokyo

• Yamamura Jun-ichi

  Institute For Solid State Physics University Of Tokyo

• Yamaura J

  Univ. Tokyo Chiba

• Yamaura Junichi

  Materials Design And Characterization Laboratory Institute For Solid State Physics University Of Tok

• Yamaura J

  Univ. Tokyo Chiba Jpn

• Yamaura J

  Institute For Solid State Physics University Of Tokyo

• Yamaura Jun-ichi

  Institute For Solid State Physics The University Of Tokyo

• Hiroi Z

  Institute For Solid State Physics University Of Tokyo

• Hiroi Zenji

  Institute For Chemical Research Kyoto University

• Muraoka Y

  Institute For Solid State Physics University Of Tokyo:(present Office)research Laboratory For Surfac

• Muraoka Yuji

  Institute For Solid State Physics University Of Tokyo

• Yamauchi T

  Institute For Solid State Physics University Of Tokyo

• Yamauchi Touru

  Department Of Material Physics Faculty Of Engineering Science Osaka University

• Yamauchi Touru

  Material Design And Characterization Laboratory The Institute For Solid State Physics University Of

• MURAOKA Yoshitoshi

  Department of Metal Science and Technology,Kyoto University

• HIROI Zenji

  ISSP, University of Tokyo

• Muramatsu Takaki

  Institute For Solid State Physics University Of Tokyo

• YAMAUCHI Tohru

  Institute for Solid State Physics, University of Tokyo

• Yamaughi Touru

  Institute For Solid State Physics University Of Tokyo

• Hiroi Z

  Univ. Tokyo Kashiwa Jpn

• Muraoka Y

  Univ. Tokyo Chiba

• Yasuda Jun

  Institute For Solid State Physics University Of Tokyo

• Muramatsu T

  Institute For Solid States Physics University Of Tokyo

• Yamauchi Tohru

  Institute For Solid State Physics University Of Tokyo

• Muraoka Yuji

  Institute for Solid State Physics, University of Tokyo:(Present Office)Research Laboratory for Surface Science, Okayama University

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