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Semiconductor solar cells

Intense research work is committed to novel material systems, which can be integrated into multi-junction III/V-solar cell stacks for an additional increase in solar conversion efficiency both on both Ge- or Si-substrates. Specific emphasis is concentrating on material systems with an energy gap around 1 eV, which can be grown lattice-matched on Ge-substrates i.e. (Ga,In)(N,As) or Ga(N,As,Sb).