Patent ID: 8450134
Filing Date: 2013-05-28
Classification: H01L,Y02E,Y02P

Abstract:
1. A method of fabricating a solar cell, the method comprising: forming a first dielectric layer on a solar cell substrate; forming a P-type doped region and an N-type doped region on a backside of a solar cell substrate, the P-type and N-type doped regions being over the first dielectric layer, the backside being opposite a front side of the solar cell that faces the sun during normal operation, the substrate comprising an N-type silicon wafer; physically separating the P-type doped region and the N-type doped region in some locations and allowing the P-type doped region and the N-type doped region to touch in other locations; and depositing a second dielectric over the P-type doped region and the N-type doped region; wherein the P-type doped region comprises polysilicon that is pre-doped with a P-type dopant prior to deposition over the first dielectric layer and the N-type doped region comprises polysilicon that is pre-doped with an N-type dopant prior to formation over the first dielectric layer.