Patent ID: 7956283
Filing Date: 2011-06-07
Classification: H01L,Y02E,Y02P

Abstract:
1. A solar cell comprising: a multi-crystalline substrate consisting essentially of a metallurgical grade silicon of 99.9%-99.999% purity doped as one of a p-type or n-type, the substrate having an upper side for facing light and an underside; a thin-film structure formed directly on and in direct contact with the upper side of the substrate, thereby forming a p-i-n junction with the substrate; wherein the thin-film structure comprises an intrinsic layer formed directly on and in direct contact with the upper side of the substrate and a doped thin layer of opposite polarity of the substrate formed directly on and in direct contact with the intrinsic layer; a top conductive contact formed above the thin-film structure; a bottom conductive contact formed on the underside of the substrate.