Patent ID: 7915146
Filing Date: 2011-03-29
Classification: B82Y,H01L,Y10S

Abstract:
1. A method of forming a semiconductor nanowire comprising: forming a catalyst particle on a substrate; growing an undoped semiconductor nanowire between said catalyst particle and said substrate by subjecting said catalyst particle to a first reactant gas at a first temperature, wherein pyrolysis of said first reactant gas on sidewalls of said semiconductor nanowire is suppressed at said first temperature; and growing a shell of a doped semiconductor material around sidewalls of said undoped semiconductor nanowire by subjecting said undoped semiconductor nanowire to a second reactant and a dopant at a second temperature, wherein said second reactant and said dopant are incorporated into said shell by pyrolysis, wherein said second temperature is higher than said first temperature and said first temperature is selected so that pyrolysis processes performed at said first temperature employing said second reactant and said dopant do not effect any significant level of dopant incorporation of said dopant, wherein said dopant includes one of PH