Patent ID: 7960644
Filing Date: 2011-06-14
Classification: H01L,Y02E,Y02P

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