High speed structuring of CIS thin-film solar cells with picosecond laser ablation

Heinz P. Huber; Marina Englmaier; Christian Hellwig; Andreas Heiss; Thomas Kuznicki; Matthias Kemnitzer; Helmut Vogt; Raluca Brenning; Joerg Palm

doi:10.1117/12.812332

24 February 2009 High speed structuring of CIS thin-film solar cells with picosecond laser ablation

Heinz P. Huber, Marina Englmaier, Christian Hellwig, Andreas Heiss, Thomas Kuznicki, Matthias Kemnitzer, Helmut Vogt, Raluca Brenning, Joerg Palm

Author Affiliations +

Proceedings Volume 7203, Commercial and Biomedical Applications of Ultrafast Lasers IX; 72030R (2009) https://doi.org/10.1117/12.812332
Event: SPIE LASE: Lasers and Applications in Science and Engineering, 2009, San Jose, California, United States

Abstract

Thin film solar cells have shown a big potential to decrease cost of manufacturing for photovoltaic power generation. Despite of all research attempts to optimize materials and efficiency the mass production of thin film solar cells is still employing some mechanical steps of structuring, where thin films with a thickness of approximately 1 μm are selectively separated for the monolithic serial interconnection. Here we show the structuring of CIS (CuInSe₂) thin films solar cells by picosecond laser ablation. We used a new method, which we called "directly induced laser ablation" to increase process speed for the scribing of a Mo-film on glass (pattern 1, P1) to 4000 mm/s with an elliptically shaped beam. Directly induced laser ablation exhibits a non thermal behaviour. Standard laser ablation was used to create P2 and P3 lines at a process speed up to 200 mm/s. All processes showed their functionality for a complete interconnected solar module.

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Heinz P. Huber, Marina Englmaier, Christian Hellwig, Andreas Heiss, Thomas Kuznicki, Matthias Kemnitzer, Helmut Vogt, Raluca Brenning, and Joerg Palm "High speed structuring of CIS thin-film solar cells with picosecond laser ablation", Proc. SPIE 7203, Commercial and Biomedical Applications of Ultrafast Lasers IX, 72030R (24 February 2009); https://doi.org/10.1117/12.812332

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