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High-throughput front and rear side metallization of silicon solar cells using rotary screen printing

: Lorenz, Andreas; Münzer, Anna; Lehner, Martin; Greutmann, Roland; Brocker, Heinz; Reinecke, Holger; Clement, Florian

Fulltext urn:nbn:de:0011-n-4738754 (2.4 MByte PDF)
MD5 Fingerprint: c1b3178826d835df0036ac151794030c
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Created on: 4.8.2018

Energy Procedia 124 (2017), pp.680-690
ISSN: 1876-6102
International Conference on Crystalline Silicon Photovoltaics (SiliconPV) <7, 2017, Freiburg>
Bundesministerium für Bildung und Forschung BMBF
13N13512; Rock-Star
Evaluation und Entwicklung von Rotationsdruckverfahren für die Herstellung von Si-Solarzellen
Journal Article, Conference Paper, Electronic Publication
Fraunhofer ISE ()
silicon solar cell; metallization; rotational printing; rotary screen printing

Rotational screen printing (RSP) has recently attracted attention as a highly promising high-throughput alternative for the metallization of Silicon solar cells. Compared to other metallization approaches, RSP is already a well-developed printing method which has been used for various industrial applications during the last decades. The unique benefit of this technology is the ability to apply a thick film metallization combined with a high throughput. Within the present work, we will discuss the actual achievements and challenges of this approach. We show the results of Aluminium back surface solar cells with a RSP rear side metallization and a mean conversion efficiency of η = 19.4 % compared to reference solar cells with flatbed screen printed rear side metallization and a conversion efficiency of η = 19.3 %. We further investigate the properties of fine line cylinder screens used for RSP and conventional flatbed screen printing. Using RSP with a fine line cylinder screen, we printed contact fingers with a mean width down wf = 61 mu m. Finally, we discuss the path to a further optimization of this highly promising approach.