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BACK CONTACT SOLAR CELLS USING ALUMINUM-BASED ALLOY METALLIZATION

  • US 20140360567A1
  • Filed: 03/28/2013
  • Published: 12/11/2014
  • Est. Priority Date: 08/05/2011
  • Status: Abandoned Application
First Claim
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1. A back contact solar cell structure, comprising:

  • a first aluminum-silicon alloy layer on a backside surface of a semiconductor solar cell substrate, said first aluminum-silicon alloy layer comprising base electrodes and emitter electrodes connected to base regions and emitter regions on said semiconductor solar cell substrate;

    an electrically insulating backplane layer on said first aluminum-silicon alloy, said backplane layer comprising via holes to access said first aluminum silicon alloy layer, said via holes drilled through said backplane layer and stopped at said first aluminum-silicon alloy layer at selective positions without punching through said first aluminum-silicon alloy layer, to form base contacts and emitter contacts to said first metal layer; and

    a second metal layer of electrically conductive metal on said electrically insulating backplane layer, said second metal layer electrically contacted to said first aluminum silicon alloy layer through said via holes.

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