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Aluminum foil as back side metallization for LFC cells

: Nekarda, J.-F.; Grohe, A.; Schultz, O.; Preu, R.

Fulltext urn:nbn:de:0011-n-2097505 (204 KByte PDF)
MD5 Fingerprint: 3d2db42c0e165bce2b9c3af3641d7c2c
Created on: 21.9.2012

European Commission, Joint Research Centre -JRC-:
The compiled state-of-the-art of PV solar technology and deployment. 22nd European Photovoltaic Solar Energy Conference, EU PVSEC 2007. Proceedings of the international conference. CD-ROM : Held in Milan, Italy, 3 - 7 September 2007
München: WIP-Renewable Energies, 2007
ISBN: 3-936338-22-1
European Photovoltaic Solar Energy Conference and Exhibition (EU PVSEC) <22, 2007, Milano>
Conference Paper, Electronic Publication
Fraunhofer ISE ()

The LFC (Laser-Fired-Contact) scheme procures certain modifications in the production process for the cell's back side, e.g. for the rear side metallization, compared to conventional cell manufacturing These changes yield the possibility to search for new, more efficient production processes, which are especially adapted to the LFC process. The slow and cost intensive but nevertheless standard evaporation step for the backside metallization layer of PERC cells can be replaced by using thin aluminum foil, which is fixed on the cell during the LFC laser step. First simple attempts have proven the feasibility of this approach. The first solar cells processed with this approach delivered efficiencies of up to 19.7 % compared to 21 % efficiency of the reference with evaporated aluminum so far.