Patent ID: 8679868
Filing Date: 2014-03-25
Classification: H01L,Y02E,Y02P

Abstract:
1. A method of producing a bifacial solar cell using an n-type substrate comprising: implanting a first species of n-type dopant in a back side of said n-type substrate to create an emitter, wherein said first species of n-type dopant comprises a Group V element; implanting a first species of p-type dopant in a front side of said n-type substrate to create a surface field, wherein said first species of p-type dopant comprises a Group III element; selectively implanting an additional p-type dopant to create doped contact regions on said front side of said n-type substrate, wherein said additional dopant comprises a Group III element; treating said n-type substrate thermally; and using a metallization technique to add metal contacts to the front side of said n-type substrate, wherein less than an entirety of said front side is covered with said metal contacts and said metal contacts are disposed on said doped contact regions.