Low Cost High Efficiency CIGS Solar Cells and Modules on Lightweight Titanium Foil

ISET is proposing to fabricate high efficiency CIGS modules on lightweight and flexible titanium foils using its proprietary low cost ink based process. In phase I we have developed a protective coating for the titanium foil that has made it compatible with our low cost process for fabricating high efficiency CIGS cells. The insulating nature of this coating will enable us to fabricate high efficiency modules using standard monolithic integration techniques. The proposed work is aimed at increasing the cell efficiency from 10% to over 15% by way of gallium redistribution in the absorber films, enabling achievement of specific power densities >1500 W/Kg. In addition, significant effort will be focused on optimization of the module fabrication process and minimization of performance losses during monolithic integration of the cells. Success in this project will ready the technology for larger scale testing and production on the pilot line currently being established at ISET.