Patent ID: 8501519
Filing Date: 2013-08-06
Classification: H01L,Y02E,Y02P

Abstract:
1. A method of production of a CIS-based thin film solar cell, comprising the steps of, forming an alkali control layer on a high strain point glass substrate, forming a back surface electrode layer on said alkali control layer, forming a CIS-based light absorption layer on said back surface electrode layer, and forming an n-type transparent conductive film on said CIS-based light absorption layer, wherein said alkali control layer is formed to a thickness which allows diffusion by heat treatment of the alkali metal which is contained in said high strain point glass substrate to said CIS-based light absorption layer and, furthermore, said CIS-based light absorption layer has an alkali metal added to it from the outside in addition to diffusion by heat treatment from said high strain point glass substrate.