Patent ID: 8710355
Filing Date: 2014-04-29
Classification: H01L,Y02E

Abstract:
1. A method for making a photovoltaic device, comprising: providing a silicon substrate having a p-type silicon base and an n-type silicon layer, forming a silicon nitride layer on the n-type silicon layer of the silicon substrate, placing an exchange metal in contact with said silicon nitride layer formed on the n-type silicon layer of the silicon substrate, and not in physical contact with said silicon substrate and not in physical contact with said n-type silicon layer of said silicon substrate, placing a non-exchange metal in contact with said exchange metal, firing said silicon substrate, silicon nitride layer, exchange metal and non-exchange metal to react the exchange metal with the silicon nitride layer to form a metal silicide contact to said n-type silicon layer and a conductive metal electrode in contact with said metal silicide contact.