Patent ID: 7863084
Filing Date: 2011-01-04
Classification: H01L,Y02E,Y02P

Abstract:
1. A method of making a back-contact solar cell, the method comprising the steps of: forming a plurality of holes extending from a front surface of a semiconductor substrate to a rear surface of the substrate, the substrate comprising having a first conductivity type; depositing a patterned diffusion barrier on the rear surface; forming a diffusion zone on the front surface, regions of the rear surface not covered by the diffusion barrier, and on surfaces enclosing the holes, wherein the diffusion zone has a second conductivity type opposite to that of the first conductivity type; disposing a first conductive grid on the diffusion barrier in electrical contact with the substrate in a subset of the regions of the rear surface not covered by the diffusion barrier; and disposing a second conductive grid on the rear surface in electrical contact with the diffusion zone.