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Humidity control and method for thin film photovoltaic materials

  • US 8,673,675 B2
  • Filed: 05/12/2011
  • Issued: 03/18/2014
  • Est. Priority Date: 09/30/2008
  • Status: Expired due to Fees
First Claim
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1. A method for processing a thin film photovoltaic module, the method comprising:

  • subjecting a plurality of substrates to a desiccated environment having a relative humidity of less than about 10%, wherein each substrate of the plurality of substrates includes an absorber layer overlying a first electrode, and wherein the absorber comprises a plurality of sodium bearing species having a sodium concentration of at least about 5×

    1019 atoms per cm3;

    subjecting the plurality of substrates to a liquid comprising water at a temperature from about 10 degrees Celsius to about 80 degrees Celsius to process the plurality of substrates;

    subjecting the plurality of substrates to an environment having a relative humidity of greater than about 10% to a time period of less than four hours; and

    after the step of subjecting the plurality of substrates to a liquid, forming a window layer over the absorber layer.

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