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space solar cells. Acknowledgements The authors acknowledge the Finnish Funding Agency for Technology and Innovation, Tekes, via projects “Solar III-V” (40120/09) and “Nextsolar” (40239/12). Alexander Gubanov and Ville Polojärvi acknowledge the National Doctoral Programme in Nanoscience (NGS-NANO). Joel Salmi and Wenxin Zhang are acknowledged for their support in sample processing. References 1. World Record Solar Cell with 44.7% Efficiency. http://www.ise.fraunhofer.de/en/press-and-media/press-releases/presseinformationen-2013/world-record-solar-cell-with-44.7-efficiency.
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