It has become an opportune to develop new module technologies because manufacturers are using larger wafers leading to problems with interconnection of cells. ECN has developed a new cell and module design for crystalline silicon solar cells called pin-up module (PUM) based on old patents (Jong, US Patent 3,903,428, 1975; Pack, US Patent 3,903,427, 1975). In this design a limited number of holes serve as vias for interconnection of the front-side metallisation to a foil at the rear side by using pins. In this way the busbars at the front side are eliminated, thus reducing shadow losses. Calculations show that for 100 cm 2 cells, the efficiency will be 0.4% absolute higher. For larger cells, the efficiency gain will be as high as 1%. The PUM concept gives the possibility to increase cell dimensions without reducing the output.
Solar Energy Materials and Solar Cells – Elsevier
Published: Jan 1, 2001
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