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Protective layer for the back reflector of a photovoltaic device

  • US 5,221,854 A
  • Filed: 11/18/1991
  • Issued: 06/22/1993
  • Est. Priority Date: 11/18/1991
  • Status: Expired due to Term
First Claim
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1. In a photoresponsive device comprising a light reflective electrode formed at least partially of silver;

  • a transparent conductive oxide layer disposed atop said light reflective electrode;

    a photovoltaic semi-conductor body disposed atop said transparent conductive oxide layer said semi-conductor body being operative to provide for a flow of electrical current in response to light energy incident thereon; and

    a light transmissive electrode disposed atop said semi-conductor body, the improvement comprising;

    a discontinuous protective layer operatively disposed between said light reflective electrode and the transparent conductive oxide layer, so as to provide a substantially protected region on said reflective electrode and a substantially unprotected region on said reflective electrode said discontinuous protective layer being operative to substantially prevent the oxidation of said light reflective electrode by said transparent conductive oxide layer while allowing the flow of electrical current between said light reflective electrode and said light transmissive electrode.

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