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Several options for solar grade silicon feedstock have been investigated over the years to bring down the costs of silicon wafers. Generally the resulting silicon contains higher levels of impurities, the level depending on the refining processes. In this work wafers from a p-type mc-Si ingot made with feedstock contaminated with 120 ppma of carbon have been processed firstly into solar cells and...
We investigate the compatibility of silicone-based electrically conductive adhesives and different surface finishes of the conductive backsheet (CBS) used in MWT module assembly technology. We find that the same ECA can lead to dramatically different properties of the electrical contact depending on the kind of surface finish. On lower cost surface finishes, such as those based on Organic Solderability...
A new silicone-based Electrically Conductive Adhesive (ECA) has been developed for the Metal Wrap-Through module technology. The ECA has a Ag filler content below 60% but maintains a conductivity after curing below 1mOhmcm. It is flexible over a wide range of temperatures, which enables stress-relief and is beneficial for durability. Four-cells mini-modules have been made using the newly developed...
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