The United States of America As Represented by the Administrator of the

George A Mazaris

John C Evans, Jr

An-Ti Chai

Henry W Brandhorst, Jr

Cosmo R Baraona

Larry R Scudder

Interdigitated back contact solar cells are made by screen printing dopant materials onto the back surface of a semiconductor substrate in a pair of interdigitated patterns. These dopant materials are then diffused into the substrate to form junctions having configurations corresponding to these patterns. Contacts having configurations which match the patterns are then applied over the junctions.

Screen printed interdigitated back contact solar cell

Diffusants are applied onto semiconductor solar cell substrates using screen printing techniques. The method is applicable to square and rectangular cells and can be used to apply dopants of opposite types to the front and back of the substrate. Then, simultaneous diffusion of both dopants can be performed with a single furnace pass.

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Brookpark, OH, United States of America

George A Mazaris