Thin film heterojunction photovoltaic cells and methods of...

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H01L 31/06 (2006.01) H01L 21/368 (2006.01) H01L 31/0224 (2006.01) H01L 31/0392 (2006.01) H01L 31/072 (2006.01) H01L 31/18 (2006.01)

Patent

CA 1188781

THIN FILM HETEROJUNCTION PHOTOVOLTAIC CELLS AND METHODS OF MAKING THE SAME ABSTRACT OF THE DISCLOSURE A method of fabricating a thin film hetero- junction photovoltaic cell which comprises depositing a film of a near intrinsic or n-type semiconductor compound formed of at least one of the metal elements of Class II B of the Periodic Table of Elements and at least tellurium and then heating said film at a temperature between about 250°C and 500°C for a time sufficient to convert said film to a suitably low resistivity p-type semiconductor compound. Such film may be deposited initially on the surface of an n-type semiconductor substrate. Alternatively, there may be deposited on the converted film a layer of n-type semiconductor compound different from the film semiconductor compound. The resulting photovoltaic cell exhibits a substantially increased power output over similar cells not subjected to the method of the present invention.

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