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Solar module having reflector between cells

United States Patent

November 30, 1999
View the Complete Patent at the US Patent & Trademark Office
A photovoltaic module comprising an array of electrically interconnected photovoltaic cells disposed in a planar and mutually spaced relationship between a light-transparent front cover member in sheet form and a back sheet structure is provided with a novel light-reflecting means disposed between adjacent cells for reflecting light falling in the areas between cells back toward said transparent cover member for further internal reflection onto the solar cells. The light-reflecting comprises a flexible plastic film that has been embossed so as to have a plurality of small V-shaped grooves in its front surface, and a thin light-reflecting coating on said front surface, the portions of said coating along the sides of said grooves forming light-reflecting facets, said grooves being formed so that said facets will reflect light impinging thereon back into said transparent cover sheet with an angle of incidence greater than the critical angle, whereby substantially all of the reflected light will be internally reflected from said cover sheet back to said solar modules, thereby increasing the current output of the module.
Kardauskas; Michael J. (Billerica, MA)
ASE Americas, Inc. (Billerica, MA)
09/ 066,157
April 24, 1998
This invention was made under Department of Energy Subcontract No. NERL-ZAF-6-14271-13.