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AMETIST - Advanced III-V Materials and Processes Enabling Ultrahigh-efficiency Photovoltaics


Solar cells convert sunlight into electricity utilizing the photovoltaic effect. AMETIST project targets to maximize the conversion efficiency by advancing the frontier in material science and optoelectronics technology.

  • Funded by H2020 EXCELLENT SCIENCE European Research Council (ERC) program
  • Based on novel GaInNAsSb and GaNAsBi heterostructures with absorption in the spectral range from 0.7 eV to 1.4 eV
  • Tandem cells with more than 4 junctions fabricated by molecular beam epitaxy (MBE)
  • 50% efficiency target under concentrated terrestrial light
  • >35% efficiency target for space operation
  • Nanophotonic solutions for light-trapping, spectral, and spatial control of solar radiation