Novel Concepts for High-efficiency lightweight space solar cells

Federica Cappelluti, Giovanni Ghione, Mariangela Gioannini, G Bauhuis, Peter Mulder, John Schermer, Marco Cimino, Giuseppe Gervasio, Günther Bissels, Eleni Katsia, Timo Aho, Tapio Niemi, Mircea Guina, Dongyoung Kim, Jiang Wu, Huiyun Liu

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

    9 Citations (Scopus)
    111 Downloads (Pure)


    One of the key issues in the design and development of a satellite Photovoltaic Assembly (PVA) is the trade-off to be made between the available volume located to the PVA, its mass and the total amount of power that the solar panels have to guarantee to the spacecraft. The development of high-efficiency, flexible, lightweight solar cells is therefore instrumental to the design of future satellites providing enhanced missions and services. Based on the consolidated development of GaAs-based single junction and lattice matched triple-junction solar cells, several research efforts are being pursued worldwide to further increase the efficiency and reduce mass. Promising approaches include thin-film technologies such as Inverted Metamorphic and Epitaxial Lift-Off (ELO), and the use of nanostructures or highly mismatched alloys grown by MBE. We propose here an alternative path towards the development of lightweight GaAs-based solar cells with the potential to exceed the Shockley-Queisser (SQ) limit of single junction cells. Our approach is based on the synergistic combination of thin-film design, quantum dots (QDs) absorption, and photonic nanostructures. Challenges and opportunities offered by the use of QDs are discussed. A cost-effective and scalable fabrication process including ELO technology and nanoimprint lithography is outlined. Finally, a proof-of-concept design, based on rigorous electromagnetic and physics-based simulations, is presented. Efficiency higher than 30% and weight reduction close to 90% - owing to the substrate removal - makes the proposed device to rank record power-to-weight ratio, with the potential to become a cost-effective, attractive option for next generation space solar cells.
    Original languageEnglish
    Title of host publicationProceedings of 11th European Space Power Conference 2016
    Publication statusPublished - 2017
    Publication typeA4 Article in conference proceedings
    EventEuropean Space Power Conference - Thessaloniki, Greece
    Duration: 3 Oct 20167 Oct 2016

    Publication series

    NameE3S Web of Conferences
    ISSN (Electronic)2267-1242


    ConferenceEuropean Space Power Conference
    Internet address

    Publication forum classification

    • Publication forum level 1


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