Patent ID: 7998788
Filing Date: 2011-08-16
Classification: H01L,Y02E,Y02P,Y10S

Abstract:
1. A method of forming a photovoltaic device, the method comprising the steps of: forming a plurality of silicon, germanium or silicon germanium nanowires on a substrate, wherein the plurality of nanowires attached to the substrate comprises a nanowire forest; in the presence of a first doping agent and a first volatile precursor, depositing a first doped semiconductor layer over the nanowire forest that conforms to, and has the same relative shape as, the nanowire forest; in the presence of a second doping agent and a second volatile precursor, depositing a second doped semiconductor layer on the first doped semiconductor layer that conforms to, and has the same relative shape as, the nanowire forest, wherein at least one of the first volatile precursor and the second volatile precursor comprises one or more of silane and germane, and wherein the first doping agent comprises one of an n-type doping agent and a p-type doping agent and the second doping agent comprises a different one of the n-type doping agent and the p-type doping agent from the first doping agent, such that a p-n junction is formed over the nanowire forest; and depositing a transparent electrode layer over at least a portion of the second doped semiconductor layer.