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Light-detectable solid thin-film secondary battery

  • US 7,276,312 B2
  • Filed: 12/26/2003
  • Issued: 10/02/2007
  • Est. Priority Date: 01/14/2003
  • Status: Expired due to Fees
First Claim
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1. A photosensitive solid-state thin-film lithium-ion secondary cell comprising:

  • a substrate;

    a photosensitive negative-electrode active material layer comprising porous silicon formed on said substrate by anodizing;

    a solid electrolyte layer formed on said photosensitive negative-electrode active material;

    a positive-electrode active material layer formed on said solid electrolyte layer; and

    a current collector layer formed on said positive-electrode active material layer,wherein the photosensitive solid-state thin-film lithium-ion secondary cell is structured so as to make said photosensitive negative-electrode active material layer receive extraneous light,wherein extraneous light is to be constantly detected by utilizing a change in open-circuit voltage of the cell caused when the extraneous light is incident on the photosensitive negative-electrode active material layer.

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