AIP conference proceedings · 2012 · 140 citations · 0 references
EngineeringElectrical EngineeringMaterials ScienceOptoelectronicsSemiconductor DevicesSemiconductor MaterialsCompound SemiconductorsPhotovoltaic DevicesPhotovoltaic MaterialsSemiconductor PhysicsSolar Cell MaterialsSolar CellsHeterojunction DevicesHeterojunction Solar CellsHeterojunctionsMulti-junction Solar CellsPhotovoltaic SystemsSemiconductor HeterojunctionsSolar Cell Device PhysicsTunable Materials
Solar Junction has developed a set of dilute nitride compound semiconductors with antimony that offer tunable absorption between the GaAs and Ge bandedges, while retaining lattice matching to GaAs or Ge substrates. By replacing the Ge junction in a conventional triple junction solar cell with a GaInNAsSb junction, world record cell efficiencies of 43.5% have been achieved, and CPV module efficiencies (DC) exceeding 35% may now be possible in the near future.