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Screen Printing Aluminium Pastes for Thin Silicon Solar Cells with Passivated Rear Surface and LFC Contacts

: Schwab, C.; Thaidigsmann, B.; Nold, S.; Linse, M.; Lottspeich, F.; Prince, A.; Young, R.; Fuge, G.; Weigand, P.; Wolf, A.; Clement, F.; Biro, D.; Preu, R.

Volltext urn:nbn:de:0011-n-2210704 (286 KByte PDF)
MD5 Fingerprint: 1ad5d9e71e15b98657e5c3a86e622a7c
Erstellt am: 7.12.2012

European Commission:
26th European Photovoltaic Solar Energy Conference and Exhibition, EU PVSEC. Proceedings : 5th to 9th September 2011 at the CCH - Congress Centre and International Fair Hamburg in Germany
München: WIP-Renewable Energies, 2011
ISBN: 3-936338-27-2
European Photovoltaic Solar Energy Conference and Exhibition (EU PVSEC) <26, 2011, Hamburg>
Konferenzbeitrag, Elektronische Publikation
Fraunhofer ISE ()
PV Produktionstechnologie und Qualitätssicherung; Silicium-Photovoltaik; Produktionsanlagen und Prozessentwicklung

This work investigates three different screen printing aluminium pastes especially designed for solar cells with passivated rear side. We present large area, 150 m thin silicon solar cells with passivated surfaces fabricated from Czochralski silicon using exclusively industrial-type production equipment. The rear surface of the cells exhibit solder pads for easy module assembly. Laser fired contacts connect the p-type base to the rear side metallization. Differences in conversion efficiency depending on the applied aluminium paste are observed. These differences are assigned to the measure of damage to the rear side passivation induced by the different pastes during contact firing. It is also shown that a reduced aluminium paste lay down of 4.5 mg/cm² leads to competitive conversion efficiencies and thus is a simple and promising way to decrease production costs.