METHOD FOR PRODUCING A MONOCRYSTALLINE SOLAR CELL
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United States of America Patent
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Issued Date -
May 26, 2011
app pub date -
May 5, 2009
filing date -
May 7, 2008
priority date (Note) -
Abandoned
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Abstract
A method for producing a monocrystalline solar cell having a passivated back side and a back side contact structure, having the following steps: applying a passivating dielectric layer onto the back side of the cell over the entire surface; removing the passivating layer locally in the area of bus bars and local contact locations; coating the back side of the cell homogeneously to develop an unpatterned, thin metal layer, which touches the surface of the substrate material in the areas free of the passivating layer; generating a thick layer from a conductive paste in the area of the bus bars and the local contact locations; and sintering of the thick layer at a temperature above a predefined eutectic temperature, and the formation of a eutectic, low-resistance connection of the thin metal layer to the surface of the substrate material as well as to the conductive particles of the thick layer paste.
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