Patent ID: 9159863
Filing Date: 2015-10-13
Classification: H01L,Y02E

Abstract:
1. A method of forming a CIGS film absorption layer for a solar cell, comprising the steps of: providing a first precursor comprising a first substrate having a major process precursor film formed thereon, the major process precursor film containing two or more of Cu, In, Ga, and Se; providing a second precursor comprising a second substrate having an element supplying precursor film formed thereon, the element supply precursor film containing two or more of Cu, In, Ga and Se; orienting the precursors with the major process precursor film and element supplying precursor film facing one another so as to allow diffusion of elements between the films during annealing; annealing the oriented films; and separating the precursors after the annealing step, wherein the CIGS film is formed over the first substrate and either a CIGS film or a precursor film containing two or more of Cu, In, Ga, and Se remains over the second substrate.