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Combining the advantages of wrap through metallization and rear surface passivation into industrial MWT-PERC devices

: Thaidigsmann, B.; Wolf, A.; Clement, F.; Biro, D.; Preu, R.

Volltext urn:nbn:de:0011-n-1592513 (545 KByte PDF)
MD5 Fingerprint: 228dc3dd0e97bd13fdc2e2b6e3321b26
Erstellt am: 3.8.2012

European Commission:
25th European Photovoltaic Solar Energy Conference and Exhibition, EU PVSEC 2010. Proceedings : 5th World Conference on Photovoltaic Energy Conversion, 6-10 , September 2010, Valencia, Spain
München: WIP-Renewable Energies, 2010
ISBN: 3-936338-26-4
European Photovoltaic Solar Energy Conference and Exhibition (EU PVSEC) <25, 2010, Valencia>
World Conference on Photovoltaic Energy Conversion <5, 2010, Valencia>
Konferenzbeitrag, Elektronische Publikation
Fraunhofer ISE ()
PV Produktionstechnologie und Qualitätssicherung; Silicium-Photovoltaik; Pilotherstellung von industrienahen Solarzellen; Industrielle und neuartige Solarzellenstrukturen

We present thin metal-wrap-through silicon solar cells with passivated surfaces fabricated from Czochralski-Si substrates. Nearly all process steps are performed on industrial production equipment, including screen printing of the contacts. The thickness of the substrate after all process steps is only 120 µm, nevertheless the cells show short circuit current densities of up to 39 mA/cm2 which indicates reduced shading losses, superior light trapping and high quality surface passivation. The rear surface of the cell exhibits soldering pads for easy module assembly. Laser fired contacts connect the p-type base to the rear metallization. An analysis of reflectance and quantum efficiency data quantifies the losses in short circuit current originating from different loss mechanisms such as shading, front surface- and escape reflectance as well as emitter recombination.