E3S Web Conf.
Volume 16, 201711th European Space Power Conference
|Number of page(s)
|Power Generation: Solar Cells
|23 May 2017
Status of Four-Junction Cell Development at Fraunhofer ISE
1 Fraunhofer Institute for Solar Energy Systems ISE, Heidenhofstrasse 2, 79211 Freiburg (Germany)
2 AZUR SPACE Solar Power GmbH, Theresienstrasse. 2, 74072 Heilbronn, (Germany)
* Email: email@example.com
Four-junction solar cells are being developed for space applications as they promise higher efficiencies compared to the present GaInP/GaInAs/Ge triple-junction industry standard. There are multiple technological routes to achieve four-junction cells with the ideal bandgap combination of 1.9 eV, 1.4 eV 1.05 eV and 0.7 eV. This includes metamorphic growth concepts and direct semiconductor wafer bonded technology. All cell designs have their specific advantages and challenges. Therefore, at Fraunhofer ISE a plurality of different four-junction cell concepts is under investigation. The current status of the development and a discussion of so far achieved characteristics are presented in this work.
© The Authors, published by EDP Sciences, 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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