Figure 7
From: Metamaterial emitter for thermophotovoltaics stable up to 1400 °C
The spectral degradation of the layered metamaterial emitter encompassing oxidation at medium vacuum conditions and temperatures <1400 °C, following an Arrhenius law, and microstructural changes at high vacuum conditions and temperatures >1400 °C when oxidation is suppressed. The false-colored map shows the interpolated emitter efficiency for PV cell with bandgap at 1.7 µm after 6 h annealing at defined vacuum pressure and temperature. Emitter efficiencies corresponding to the measured structures are highlighted with open circles.
