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(Upper) Measured and simulated thermal emission, normal to the surface, of the photonic crystal at 820, 900, and 1,020 °C plotted with solid and dashed lines, respectively. Simulation results of three graybody emitters with 0.7 emittance (approximation of Si emittance), at 820, 900, and 1,020 °C are shown with dotted lines. (Lower) Measured external quantum efficiency (EQE) for the GaInAsSb PV cell with antireflective coating.
