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Flexible Cu(In,Ga)Se2 Thin Film Solar Cells for Space Applications - Recent Results from a German Joint Project (PIPV2)

: Kaufmann, C.A.; Greiner, D.; Harndt, S.; Klenk, R.; Brunken, S.; Schlatmann, R.; Nichterwitz, M.; Schock, H.-W.; Unold, T.; Zajac, K.; Brunner, S.; Daume, F.; Scheit, C.; Braun, A.; Rahm, A.; Würz, R.; Kessler, F.; Günthner, M.; Pscherer, M.; Ihlow, S.; Motz, G.; Morgner, H.; Schmidt, R.G.; Lambrecht, A.; Grundmann, J.T.; Spietz, P.; Schülke, P.

Volltext ()

Bokhoven, T.P. ; European Commission:
29th European Photovoltaic Solar Energy Conference and Exhibition, EU PVSEC 2014 : Proceedings of the international conference held in Amsterdam, The Netherlands, 22 - 26 September 2014, DVD
München: WIP, 2014
ISBN: 3-936338-34-5
European Photovoltaic Solar Energy Conference and Exhibition (EU PVSEC) <29, 2014, Amsterdam>
Konferenzbeitrag, Elektronische Publikation
Fraunhofer FEP ()

Since 2007 a German consortium of academic and industrial partners develops an extremely light and flexible Cu(In,Ga)Se2 (CIGSe) thin film solar cell technology for space applications. The combination with a light support structure and an appropriate interconnection technology enables the construction of a solar generator with previously unmatched specific power (W/kg). This can be attractive as power supply for large platforms in space and is also compatible with alternative, flexible large area applications. The idea of the project is to utilize a solar cell technology, which - in comparison to the highly efficient, multi-junction III-V technology - is cheap and can be fabricated using manufacturing facilities for the terrestrial technology. Project activities encompass topics as fundamental as CIGSe thin film growth, individual aspects of single device components and also device interconnection, together with a corresponding support structure development. So far a maximum efficiency of 12.6% (57.8 cm²; AM1.5) could be demonstrated on an in-line roll-to-roll fabricated single device and a support structure prototype with a projected area density <1 kg/m² has been demonstrated. An earlier version of this constantly evolving technology was successfully tested on-orbit as part of the TET-1 mission.