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Progress in fine-line metallization by co-extrusion printing on cast monosilicon PERC solar cells

 

In this paper, we present our progress in co-extrusion printing for fine-line metallization. With this technique, 30 µm wide and 20 µm tall front grid fingers are currently printed. Applied to industrial size cast silicon PERC solar cells, a world record conversion efficiency of 21.42% has been demonstrated. This result was achieved with a production-ready co-extrusion printer that runs at a throughput of 2700 wafers per hour. Furthermore, a printhead is presented that has been developed to enable co-extrusion printing on pseudo-square wafers. Finally the cost advantage of the technology is discussed.

 
citation

L. Philipp Richter, Gerd Fischer, Lamine Sylla, Melanie Hentsche, Stefan Steckemetz, Matthias Müller, Corie L. Cobb, Scott E. Solberg, Ranjeet Rao, Scott Elrod, Phedon Palinginis, Eric Schneiderlöchner, D. Holger Neuhaus, Progress in fine-line metallization by co-extrusion printing on cast monosilicon PERC solar cells, Solar Energy Materials and Solar Cells, Volume 142, Pages 18-23, November 2015.