Patent ID: 8563354
Filing Date: 2013-10-22
Classification: C23C,H01L,Y02E

Abstract:
1. A method of forming an absorber layer of copper indium gallium diselenide (CIGS) solar modules, comprising the steps of: (a) providing a substrate or superstrate; (b) preheating the substrate or superstrate to a first predetermined temperature; (c) depositing onto the substrate or superstrate a first layer containing Cu and Ga in absence of Se and In; (d) exposing the first layer to Se; (e) repeating steps (c) and (d) until the first layer attains a first predetermined thickness; (f) heating the substrate or superstrate to a second predetermined temperature, the second predetermined temperature being higher than the first predetermined temperature; (g) depositing onto the substrate or superstrate a second layer containing Cu, In, and Ga in absence of Se; (h) exposing the second layer to Se; and (i) repeating steps (g) and (h) until the second layer attains a second predetermined thickness.