Gerhard Heise, Andreas Heiss, Christian Hellwig, Thomas Kuznicki, Helmut Vogt, Joerg Palm and Heinz P. Huber Optimization of picosecond laser structuring for the monolithic serial interconnection of CIS solar cells Progress in Photovoltaics: Research and Applications 21
We report on the optimization of picosecond laser structuring for the monolithic serial interconnection of CIS thin film solar cells. We have examined the structuring efficiencies for induced laser ablation processes, for elliptical and flat top beam shaping and for the application of different laser wavelengths. We structured the molybdenum back contact and the ZnO front contact with a process speed of 4 m/s and the CIS layer with 0.2 m/s, using only 2 W of laser power.
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