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Originalpublikation
Schulte-Huxel, H.; Blankemeyer, S.; Steckenreiter, V.; Kajari-Schroeder, S.; Brendel, R.: Laser-welded interconnection of screen-printed Si solar cells. In: Energy Procedia 55 (2014), S. 356-360. DOI: https://doi.org/10.1016/j.egypro.2014.08.102
We demonstrate the laser welding of Al interconnects to the BSF rear-side of screen-printed two-side-contacted solar cells. The Al paste on the rear side of solar cell is laser-welded to an Al foil. This reduces the silver consumption of the solar cells by making silver pads on the rear side obsolete. Our proof-of-concept modules are free of laser damage. A 3-cell-module from 6" solar cells shows no change in fill factor within the statistical measurement uncertainty after artificial aging in 500 humidityfreeze cycles.