Patent ID: 9698285
Date: 2017-07-04
CPC Classifications: H01L,Y02E,Y02P

Claim:
1. A process for manufacturing a photovoltaic structure comprising: forming a cadmium sulphoselenide layer over a substrate structure; and forming a p-type absorber layer over the cadmium sulphoselenide layer, wherein the p-type absorber layer comprises cadmium and tellurium; wherein the method comprises depositing a cadmium sulphotelluride interfacial layer over the cadmium sulphoselenide layer and then forming the p-type absorber layer over the cadmium sulphotelluride layer; wherein the cadmium sulphoselenide layer is formed by one of: closed space sublimation, sputtering, vapor transport deposition, atomic layer deposition, and chemical bath deposition; the process further comprising a step of annealing at an elevated temperature to create a compound region containing cadmium, sulfur, tellurium, and selenium in CdS