Patent ID: 8865512
Filing Date: 2014-10-21
Classification: H01L,Y02E,Y02P

Abstract:
1. A method of forming an interfacial layer between a thin film of p-type semiconductor Cu(In,Ga)(Se,S) 2 light absorbing layer (CIGS-layer) and a thin film of n-type conductive window layer on a substrate of a thin film solar cell structure, comprising: vacuum deposition of the CIGS-layer in a CIGS process chamber; transporting the substrate with deposited CIGS-layer to an atomic layer deposition process chamber without exposing the substrate to an atmosphere; and providing said interfacial layer in the atomic layer deposition process chamber initially by depositing a first sulphur containing buffer layer on a surface of the CIGS-layer using atomic layer deposition and finally by depositing a second ZnO buffer layer on top of the first sulphur containing buffer layer using atomic layer deposition.