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Pilot-line processing of very large (21 x 21 cm²) and thin mc-Si solar cells

: Clement, F.; Preu, R.; Reis, I.E.; Biro, D.; Rentsch, J.; Zimmer, M.; Rein, S.; Emanuel, G.; Krieg, A.; Müller, A.; Martin, F.

Volltext urn:nbn:de:0011-n-734612 (507 KByte PDF)
MD5 Fingerprint: 1d3a689962aeb9bd344f05ab7c2b2f62
Erstellt am: 28.9.2012

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>
Konferenzbeitrag, Elektronische Publikation
Fraunhofer ISE ()

Enlargement of the wafer size from 15.6 x 15.6 cm2 to 21 x 21 cm2 seems to be an effective cost reduction strategy of solar cell production. Especially batch-type production shows a high cost reduction potential. First cell manufacturers are already able to produce multi-crystalline (mc) solar cells based on very large scale (VLS) wafers. But before a mass production is worth, a few challenges like mechanical yield during cell manufacturing and homogeneity over total wafer surface have to be solved. Therefore, more than 100 VLS solar cells with a thickness of max. 240 µm were processed at the pilot-line of the PhotoVoltaic Technology Evaluation Center (PV-TEC) at the Fraunhofer ISE. To transfer the standard solar cell process successfully, a front grid optimisation was carried out, which resulted in cell efficiencies up to 15.2%. Compared with standard 15.6 x 15.6 cm2 mc solar cells the efficiency is in the same range. Furthermore, two mini-modules were successfully produced.