Patent ID: 7854963
Filing Date: 2010-12-21
Classification: C23C,H01L,Y02E

Abstract:
1. A method of forming on a base, a Cu(In,Ga)(S,Se) 2 layer with substantially uniform Ga distribution, the method comprising; depositing a precursor film on the base, the precursor film including Cu, In and Ga, sulfurizing the precursor film with S thus forming a sulfurized precursor layer with a substantially uniform Ga distribution, wherein the sulfurizing causes reactions between the S and the Ga, thus creating various Ga—S phases that are distributed throughout the precursor film, and selenizing the sulfurized precursor layer with Se to reduce the sulfur concentration therein by replacing some of the S in the Ga—S phases with Se while maintaining the Ga as distributed throughout the precursor layer from the step of sulfurizing and thereby obtaining the Cu(In,Ga)(S,Se)