PHOTOVOLTAIC SOLAR CELL AND METHOD FOR PRODUCING A METALLIC CONTACT-CONNECTION OF A PHOTOVOLTAIC SOLAR CELL
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United States of America Patent
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Aug 25, 2016
app pub date -
Sep 23, 2014
filing date -
Sep 27, 2013
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Abstract
The invention relates to a method for producing a metallic contact-connection of a photovoltaic solar cell, including the following method steps: A providing a semiconductor substrate, and B applying an aluminum-containing contact-connection layer indirectly or directly to a side of the semiconductor substrate. The invention is characterized in that in a method step C, a diffusion barrier layer, which acts as a diffusion barrier at least with respect to aluminum, is applied indirectly or directly to the contact-connection layer, and in a method step D, a solderable layer comprised of a solderable material is applied indirectly or directly to the diffusion barrier layer, and in that the diffusion barrier layer and the contact-connection layer are applied by a PVD method.
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