<i>n</i>-type amorphous (or microcrystalline) silicon/<i>p</i>-type crystalline silicon heterojunction electrodes for efficient and stable solar-to-chemical conversion

DOI PDF 被引用文献2件
  • Keiichi Ueda
    Laboratory for Chemical Conversion of Solar Energy and Department of Chemistry, Faculty of Engineering Science, Osaka University, Toyonaka, Osaka 560, Japan
  • Yoshihiro Nakato
    Laboratory for Chemical Conversion of Solar Energy and Department of Chemistry, Faculty of Engineering Science, Osaka University, Toyonaka, Osaka 560, Japan
  • Yuichi Sakai
    Laboratory for Chemical Conversion of Solar Energy and Department of Chemistry, Faculty of Engineering Science, Osaka University, Toyonaka, Osaka 560, Japan
  • Michio Matsumura
    Laboratory for Chemical Conversion of Solar Energy and Department of Chemistry, Faculty of Engineering Science, Osaka University, Toyonaka, Osaka 560, Japan
  • Hiroshi Tsubomura
    Laboratory for Chemical Conversion of Solar Energy and Department of Chemistry, Faculty of Engineering Science, Osaka University, Toyonaka, Osaka 560, Japan

書誌事項

公開日
1988-08-01
DOI
  • 10.1063/1.341826
公開者
AIP Publishing

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<jats:p>Silicon (Si) electrodes having a n-p heterojunction for hydrogen photoevolution were prepared by depositing n-type amorphous or microcrystalline Si layers on p-type single-crystal Si wafers by the plasma chemical-vapor-deposition method. Electrodes of this type, each coated with a thin platinum layer (about 1 nm) as a reaction catalyst, generated photocurrents much higher than those for Pt-coated n+ -p homojunction single-crystal Si electrodes, together with photovoltages nearly the same as those for the latter electrodes, clearly indicating the ‘‘window’’ effect of the n-type amorphous or microcrystalline Si layer. A photoelectrochemical cell equipped with a Si electrode of the present type and a Pt-plate counterelectrode, separated with a cation exchange membrane, photodecomposed hydrogen iodide into hydrogen and iodine with a solar-to-chemical conversion efficiency of 10.8% (air mass 1, 100 mW/cm2 ), the highest of the efficiencies so far reported for the direct solar-to-chemical conversion without any externally applied voltage.</jats:p>

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