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Proceedings Paper

Quasi-simultaneous laser soldering for the interconnection of back-contact solar cells with composite foils
Author(s): Simon W. Britten; Rumitha Seva Bala Sundaram; Alexander Olowinsky; Arnold Gillner
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Paper Abstract

In this contribution we evaluate laser scanning approaches for the interconnection of the 31 electrical contacts of a MWT back-contact solar cell. The selective energy deposition with a laser system allows the minimization of thermomechanical stress in the wafer, but requires adapted scanning strategies to prevent damages in the solar cell top layer. The laser scanning process of the MWT solar cell is conducted in combination with a composite foil as an interconnector and a pre-dispensed solder paste. This approach is evaluated regarding the joining quality of the interconnection as a function of the scanning strategy.

Paper Details

Date Published: 6 March 2014
PDF: 11 pages
Proc. SPIE 8968, Laser-based Micro- and Nanoprocessing VIII, 89680V (6 March 2014); doi: 10.1117/12.2040523
Show Author Affiliations
Simon W. Britten, Fraunhofer-Institut für Lasertechnik (Germany)
Rumitha Seva Bala Sundaram, Fraunhofer-Institut für Lasertechnik (Germany)
Alexander Olowinsky, Fraunhofer-Institut für Lasertechnik (Germany)
Arnold Gillner, Fraunhofer-Institut für Lasertechnik (Germany)

Published in SPIE Proceedings Vol. 8968:
Laser-based Micro- and Nanoprocessing VIII
Udo Klotzbach; Kunihiko Washio; Craig B. Arnold, Editor(s)

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