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Evaluation of flexographic printing technology for multi-busbar solar cells

: Lorenz, A.; Senne, A.; Rohde, J.; Kroh, S.; Wittenberg, M.; Krüger, K.; Clement, F.; Biro, D.

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Energy Procedia 67 (2015), pp.126-137
ISSN: 1876-6102
Workshop on Metallization for Crystalline Silicon Solar Cells <5, 2014, Constance>
Journal Article, Conference Paper, Electronic Publication
Fraunhofer ISE ()
PV Produktionstechnologie und Qualitätssicherung; Silicium-Photovoltaik; Pilotherstellung von industrienahen Solarzellen; solar cell; printing; metallization

Rotational flexographic printing is a promising high-throughput technology for the front side metallization of silicon solar cells. Very low silver consumption and the possibility to realize narrow contact fingers make this technology particularly interesting for multi-busbar solar cells. Within this work, fundamental printing tests have been carried out on a flexographic roll-to-flat machine using an experimental anilox roll and elastomeric laser-engraved printing plates. A double printing process with intermediate drying step has been applied. Contact fingers down to 33 μm in width and up to 8 μm in height have been realized using this technology. Lateral resistances in the range 500 to 1500 Ω/m have been determined by four point measurement method. These results underline the capability of flexographic printing for fine line metallization of multi-busbar solar cells.