Four-junction wafer bonded concentrator solar cells

  title={Four-junction wafer bonded concentrator solar cells},
  author={Frank Dimroth and Thomas N. D. Tibbits and Markus Niemeyer and Felix Predan and Paul Beutel and Christian Ing. habil. Karcher and Eduard Oliva and Gerald Siefer and David Lackner and Peter Fuss-Kailuweit and Andreas W. Bett and Rainer Klaus Krause and Charlotte Drazek and Eric Guiot and Jocelyne Wasselin and Aur{\'e}lie Tauzin and Thomas Signamarcheix},
  journal={2015 IEEE 42nd Photovoltaic Specialist Conference (PVSC)},
Summary form only given. The highest solar cell conversion efficiencies are achieved with Four-junction devices under concentrated sunlight illumination. Different cell architectures are under development, all targeting an ideal bandgap combination close to 1.9 eV, 1.4 eV, 1.0 eV and 0.7 eV. Wafer bonding is used in this work to combine materials with a significant lattice-mismatch. Three cell architectures are presented using the same two top junctions of GaInP/GaAs but different infrared… 
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