ULTRA-LARGE 20X20CM2 MULTI-CRYSTALLINE SOLAR CELLS FIRST EXPERIMENTS AND LIMITS FOR INDUSTRIAL SOLAR CELL PRODUCTION

摘要

Processing of solar cells on ultra-large scale multi-crystalline wafers (ULS) with 200 or 210mm edge length respectively are latest development of industry in Japan and Germany. The first modules with ULS solar cells are available in year 2005 and it seems a real trend of production technology comparable with decreasing wafer thickness. The reason for this development is the strong necessity of PV industry to reduce costs per Wpeak. First experiments were carried out on ULS wafer material, in order to define the major problems and limits for industriallike production. The potential of cost reduction and limits of efficiency and yield were calculated. The difference of production lines with a batch-type production and inline-type production will be compared. A significant cost reduction can only be achieved with a batch-type production line, with yield and efficiency only slightly decreased.