Patent ID: 8945976
Filing Date: 2015-02-03
Classification: H01L,Y02E,Y02P

Abstract:
1. A method for making a solar cell comprising: forming a doped layer into a doped substrate, wherein the conductivity type of the doped layer is opposite the conductivity type of at least an adjacent portion of the doped substrate; forming a first oxide layer on a first surface of the substrate proximate the doped layer and forming a second oxide layer on a second surface of the substrate opposite the doped layer; removing the first and second oxide layers to expose the first and the second surfaces of the substrate; forming a first undoped amorphous layer to the first surface of the substrate proximate the doped layer; forming a second undoped amorphous layer to the second surface of the substrate opposite the doped layer; forming a first doped amorphous layer on the first undoped amorphous layer, wherein the conductivity type of the first doped amorphous layer is the same as the conductivity type of the doped layer; and forming a second doped amorphous layer on the second undoped amorphous layer, wherein the conductivity type of the second doped amorphous layer is opposite the conductivity type of the doped layer.