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Ultrafine front side metallization on silicon solar cells by industrial dispensing technology

: Pospischil, M.; Kuchler, M.; Klawitter, M.; Rodriguez, C.; Padilla, A.; Efinger, R.; Gentischer, H.; König, M.; Hörteis, M.; Wende, L.; Doll, O.; Clement, F.; Biro, D.

Fulltext urn:nbn:de:0011-n-3112885 (282 KByte PDF)
MD5 Fingerprint: 464be3989e53c79a31e682288551893c
Created on: 7.11.2014

Bokhoven, T.P. ; European Commission:
29th European Photovoltaic Solar Energy Conference and Exhibition, EU PVSEC 2014 : Proceedings of the international conference held in Amsterdam, The Netherlands, 22 - 26 September 2014, DVD
München: WIP, 2014
ISBN: 3-936338-34-5
European Photovoltaic Solar Energy Conference and Exhibition (EU PVSEC) <29, 2014, Amsterdam>
Conference Paper, Electronic Publication
Fraunhofer ISE ()
PV Produktionstechnologie und Qualitätssicherung; Silicium-Photovoltaik; Messtechnik und Produktionskontrolle; solar cell; metallization; dispensing

This study presents a new developed, inline applicable dispensing platform that is equipped with an advanced version of previously introduced parallel dispensing print heads. At process speeds of up to 700 mm·s-1 and a substantially improved process stability, recent cell results on industrial 90 ohm/sq. emitters showed an efficiency increase of up to +0.4%abs. in comparison to standard single screen printing technology. Top values of 19.4% using standard Al-BSF technology were reached in this study. A key improvement of the technology is the new ability to process certain metal pastes originally designed for screen printing applications and thus keep in track with fast emerging paste development. Successfully evaluated screen printing pastes then can be rheologically adapted in order to reach ultrafine contact fingers at high aspect ratios and extract the whole advantage of this non-contacting printing technology.