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Printed fire-through contacts (FTC) - an alternative approach for local rear contacting of passivated solar cells

: Kick, C.; Thaidigsmann, B.; Linse, M.; Clement, F.; Wolf, A.; Biro, D.

Fulltext urn:nbn:de:0011-n-2365410 (435 KByte PDF)
MD5 Fingerprint: bb414b8949c25cf7f7b32a87c93c85ae
Created on: 27.4.2013

Nowak, S. ; European Commission:
27th European Photovoltaic Solar Energy Conference and Exhibition, EU PVSEC 2012. DVD-ROM : Proceedings of the international conference held in Frankfurt, Germany, 24 - 28 September 2012
München: WIP-Renewable Energies, 2012
ISBN: 3-936338-28-0
European Photovoltaic Solar Energy Conference and Exhibition (EU PVSEC) <27, 2012, Frankfurt>
Conference Paper, Electronic Publication
Fraunhofer ISE ()
PV Produktionstechnologie und Qualitätssicherung; Silicium-Photovoltaik; Industrielle und neuartige Solarzellenstrukturen

The novel fire-through contact (FTC) technology is a drop-in replacement for common local contact technologies such as i-PERC and LFC. Analogous to printed front contacts, the fire-through contact mechanism employs local penetration of the dielectric passivation layer during contact firing. A fire-through metal paste is locally applied onto the rear passivation layer followed by full area printing of a non-fire-through Al paste. Thus, printing technology fully replaces laser processes. In this work, microstructure analysis of the FTC contact formation as well as an analysis of the recombination and contact properties is carried out in order to identify the optimum contact layout. In the second part of the paper, the application of the concept to solar cells is presented.