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Photovoltaic device

  • US 5,738,731 A
  • Filed: 08/31/1994
  • Issued: 04/14/1998
  • Est. Priority Date: 11/19/1993
  • Status: Expired due to Term
First Claim
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1. A solar cell comprising:

  • a first junction part having a first conductivity type first semiconductor film and a second conductivity type second semiconductor film being formed on an upper surface of said first semiconductor film; and

    a second junction part having a first conductivity type third semiconductor film being formed on an upper surface of said second semiconductor film and a second conductivity type fourth semiconductor film being formed on an upper surface of said third semiconductor film,said junction parts being arranged from that having a larger forbidden bandwidth along a direction of progress of light,said first, second, third and fourth semiconductor films being formed by single-crystalline films;

    wherein an interlayer conductor prepared from a metal having an ohmic junction property with respect to said junction parts and having a thickness capable of transmitting light is interposed between said first and second junction parts; and

    wherein said second semiconductor film being arranged on one side of said interlayer conductor is different in crystal orientation from said third semiconductor film being arranged on another side of said interlayer conductor.

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