Formation of solar cells on foil substrates

摘要

A method for forming an absorber layer of a photovoltaic device comprises forming a nascent absorber layer on a metal foil substrate; and using a roll-to-roll system to transport the substrate through a furnace. The nascent absorber layer and/or substrate is heated at a distance of about 3mm to about 25mm from a surface of the nascent absorber layer and/or substrate in the furnace and in an H 2 Se gas, H 2 S gas, or group VIA vapor.