Assembly processes for thin film CIGS solar cells: Approaches for improving interconnect repeatability and costs

We have developed new assembly equipment for manufacturing interconnected CIGS solar cell strings that delivers improved control of mechanical tolerances and improved form factor flexibility. The assembly approach is based upon the use of pallets that ensure alignment of solar cells and ribbons during the assembly and curing process. An overview of the assembly equipment is provided. Also discussed are the results of an improved multi-wire interconnect technology that provides a 10% reduction in series resistance relative to standard strings with interconnects provided via electrically conductive adhesive.