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Comparison of three different metallization concepts for LFC cells

: Nekarda, J.-F.; Hörteis, M.; Lottspeich, F.; Wolf, A.; Preu, R.

Fulltext urn:nbn:de:0011-n-1567696 (146 KByte PDF)
MD5 Fingerprint: 1d5a46427fcfd88339334c82d64c9eb5
Created on: 4.8.2012

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>
Conference Paper, Electronic Publication
Fraunhofer ISE ()
PV Produktionstechnologie und Qualitätssicherung; Silicium-Photovoltaik; Pilotherstellung von industrienahen Solarzellen; Industrielle und neuartige Solarzellenstrukturen

Laser fired contacts (LFC) are a well known technique to apply the rear side electrode on dielectrically passivated solar cells. Thereby, the aluminum on top of the passivation is locally heated by means of single laser pulses and subsequently alloyed into the silicon. In this contribution we present a comparison of three different metallization procedures - physical vapor deposition (PVD), screen printing (SP) and an approach based on aluminum foil (Foil). We report about their current state regarding industrial implementation and the corresponding laser processes, as well as the complexity of these approaches. Furthermore, to compare the efficiency potential, we present results of a batch of highly efficient solar cells, featuring all approaches on an identically processed front side, leading to efficiencies of 20.9 % (PVD), 21.2 % (SP) and 21.0 % (foil).