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SOLAR CELL CONTACT FORMATION USING LASER ABLATION

United States Patent Application

20150311357
A1
View the Complete Application at the US Patent & Trademark Office
The formation of solar cell contacts using a laser is described. A method of fabricating a back-contact solar cell includes forming a poly-crystalline material layer above a single-crystalline substrate. The method also includes forming a dielectric material stack above the poly-crystalline material layer. The method also includes forming, by laser ablation, a plurality of contacts holes in the dielectric material stack, each of the contact holes exposing a portion of the poly-crystalline material layer; and forming conductive contacts in the plurality of contact holes.
HARLEY, Gabriel (Mountain View, CA), SMITH, David D. (Campbell, CA), COUSINS, Peter John (Menlo Park, CA)
SunPower Corporation (San Jose CA)
14/ 793,356
July 7, 2015
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT [0002] The invention described herein was made with Governmental support under contract number DE-FC36-07G017043 awarded by the United States Department of Energy. The Government may have certain rights in the invention.