High-Temperature Refractory Metasurfaces for Solar Thermophotovoltaic Energy Harvesting.

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ID: 54559
2018
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Abstract
Solar energy promises a viable solution to meet the ever-increasing power demand by providing a clean, renewable energy alternative to fossil fuels. For solar thermophotovoltaics (STPV), high-temperature absorbers and emitters with strong spectral selectivity are imperative to efficiently couple solar radiation into photovoltaic cells. Here, we demonstrate refractory metasurfaces for STPV with tailored absorptance and emittance characterized by in situ high-temperature measurements, featuring thermal stability up to at least 1200 °C. Our tungsten-based metasurface absorbers have close-to-unity absorption from visible to near-infrared and strongly suppressed emission at longer wavelengths, while our metasurface emitters provide wavelength-selective emission spectrally matched to the band-edge of InGaAsSb photovoltaic cells. The projected overall STPV efficiency is as high as 18% when a fully integrated absorber/emitter metasurface structure is employed, which is comparable to the efficiencies of the best currently available commercial single-junction PV cells and can be further improved to potentially exceed those in mainstream photovoltaic technologies. Our work opens a path forward for high-performance STPV systems based on refractory metasurface structures.
Reference Key
chang2018hightemperaturenano Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Chang, Chun-Chieh;Kort-Kamp, Wilton J M;Nogan, John;Luk, Ting S;Azad, Abul K;Taylor, Antoinette J;Dalvit, Diego A R;Sykora, Milan;Chen, Hou-Tong;
Journal Nano letters
Year 2018
DOI
10.1021/acs.nanolett.8b03322
URL
Keywords
metasurfaces high temperature refractory metamaterials solar absorbers solar thermophotovoltaics thermal emitters

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