Thin solar cells

Details Thin solar cells Thin solar cells

H - Electricity

01

L

345/22

H01L 31/04 (2006.01)

Patent

CA 1213342

Abstract of the Disclosure Solar cells and arrays of solar cells are made as thin films or insulating substrates. In an exemplary embodiment a thin conductive film is deposited on glass and a semiconductor film is deposited over the metal. The semiconductor film has a P-N junction parallel to the substrate and can extend beyond at least some of the edge of the conductive film for insulation. Another conductive film is deposited over the semiconductor and is insulated from the first conductive film. Contacts made to edges of the conductive films form solar or photovoltaic cells. In an array of such cells the edge of the second conductive film of one cell can overlap the edge of the first conductive film of an adjacent film for connecting the cells in series. In one aspect of the invention the films are thin enough to be trans- parent. In another aspect, a plurality of semitrans- parent films are stacked to absorb selective portions of the spectrum. In another aspect a technique of stacking thin films using diagonal displacement of a mask provides successive layers with exposed and covered edges for suitable electrical connections.

407715

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