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Advanced processing techniques used for the development of dual-junction monolithic interconnected modules

: Helmers, H.; Oliva, E.; Bronner, W.; Dimroth, F.; Bett, A.W.


Bett, A.W. ; American Institute of Physics -AIP-, New York:
6th International Conference on Concentrating Photovoltaic Systems, CPV 2010 : Freiburg, Germany, 7 - 9 April 2010
Melville/NY: AIP, 2010 (AIP Conference Proceedings 1277)
ISBN: 978-0-7354-0827-2
ISSN: 0094-243X
International Conference on Concentrating Photovoltaic Systems (CPV) <6, 2010, Freiburg/Brsg.>
Conference Paper
Fraunhofer ISE ()
Epitaxie MOVPE; Materialien - Solarzellen und Technologie; III-V und Konzentrator-Photovoltaik; Alternative Photovoltaik-Technologien; III-V Epitaxie und Solarzellen; III – V: Epitaxie; Solarzellen und Bauelemente

Monolithic interconnected modules (MIMs) are large area, high voltage photovoltaic devices, realized through solar cell segments which are series-connected via interconnection trenches during wafer processing. In the presented research MIM technology is combined with the concept of multi-junction solar cells in order to increase efficiency. A lattice-matched and a metamorphic dual-junction (2J-) MIM structure are introduced. Furthermore, photovoltaic area losses due to segment interconnection are reduced due to optimized processing and the usage of advanced processing techniques. As a combined result of the research, a metamorphic 2J-MIM with a maximum efficiency of epsilon = 26.0% at a concentration of 500 suns is presented.