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Solar cell

  • US 5,100,478 A
  • Filed: 11/27/1990
  • Issued: 03/31/1992
  • Est. Priority Date: 12/01/1989
  • Status: Expired due to Term
First Claim
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1. A solar cell comprising:

  • a semiconductor substrate of a first conductivity type having opposed first and second surfaces and including a plurality of recesses disposed in the substrate at the first surface leaving a plurality of mutually isolated area of the substrate exposed at the first surface;

    an electrically insulating material filling the recesses;

    a first semiconductor film of a second conductivity type, opposite from the first conductivity type, disposed on the substrate and the electrically insulating material at the first surface and forming a plurality of mutually isolated rectifying junctions with the substrate;

    second and third semiconductor films of opposite conductivity types forming a rectifying junction and disposed on the first semiconductor film; and

    a first electrode in electrical contact with the third semiconductor film at a light incident surface of the solar cell and a second electrode disposed on the second surface of the substrate in electrical contact with the substrate.

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