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Laser-Powered Co-Firing Process for Highly Efficient Si Solar Cells

: Ourinson, D.; Emanuel, G.; Rahmanpour, K.; Ogiewa, F.; Müller, H.; Krassowski, E.; Höffler, H.; Clement, F.; Glunz, S.W.

Postprint urn:nbn:de:0011-n-6249113 (1.4 MByte PDF)
MD5 Fingerprint: 2854c69463e728f3d93906351467c8ce
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Erstellt am: 24.2.2021

IEEE Journal of Photovoltaics 11 (2021), Nr.2, S.282-288
ISSN: 2156-3381
ISSN: 2156-3403
Zeitschriftenaufsatz, Elektronische Publikation
Fraunhofer ISE ()
Photovoltaik; alternative firing; firing process; LECO; short-circuit effect; silicon solar cell; thermography; VCSEL; Silicium-Photovoltaik; Metallisierung und Strukturierung

This article presents a successful laser-powered co-firing process for highly efficient Si solar cells as a more compact and energy-efficient alternative to the conventional firing process in an infrared (IR) lamp-powered heat chamber. The best cell group reaches with laser firing only 0.1% abs lower cell efficiency compared to the best group with conventional firing, demonstrating the industrial potential of this laser firing technology. Adding the laser enhanced contact optimization (LECO) process after firing improves the cell efficiency for laser firing to the level of conventional firing, demonstrating the potential of the combination of the laser firing and the LECO process.