Monolithic Modules Incorporating String Ribbon Silicon Solar Cells with Wraparound Contacts

Building on technology developments in the areas of continuous Si ribbon growth (String Ribbon) and polymeric materials for PV modules, a method is described for forming wraparound contacts on these wafers and then interconnecting the cells in a monolithic fashion. A significant reduction in processing steps and cost can then be realized, and thinner Si ribbon can be processed with higher yields. Modules with 84 cm² and 120 cm² String Ribbon wraparound cells and printed interconnect patterns were formed using this monolithic module procedure. Accelerated reliability testing of these modules is encouraging.