@article{a35f002ab89a467e8e4da1ff84616062,
title = "Higherature Refractory Metasurfaces for Solar Thermophotovoltaic Energy Harvesting",
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), higherature 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 higherature 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.",
keywords = "Metasurfaces, high temperature, refractory metamaterials, solar absorbers, solar thermophotovoltaics, thermal emitters",
author = "Chang, {Chun Chieh} and Kort-Kamp, {Wilton J.M.} and John Nogan and Luk, {Ting S.} and Azad, {Abul K.} and Taylor, {Antoinette J.} and Dalvit, {Diego A.R.} and Milan Sykora and Chen, {Hou Tong}",
note = "Funding Information: The authors are thankful for discussions with Eli Ben-Naim, Stuart Trugman, and Nikolai Sinitsyn. C.C.C. gratefully acknowledges the CINT Integration Lab staff, Anthony R. James, Willard Ross, Denise Webb, Joseph Lucero, and Doug Pete for their assistance in device fabrication and valuable discussions. The authors acknowledge support from the Los Alamos National Laboratory LDRD program. W.J.M.K.K. acknowledges the Center for Nonlinear Studies (CNLS) for partial support. This work was performed, in part, at the Center for Integrated Nanotechnologies, a U.S. Department of Energy, Office of Basic Energy Sciences Nanoscale Science Research Center operated jointly by Los Alamos and Sandia National Laboratories. Los Alamos National Laboratory, an affirmative action/equal opportunity employer, is operated by Los Alamos National Security, LLC, for the National Nuclear Security Administration of the U.S. Department of Energy under Contract No. DE-AC52-06NA25396. Funding Information: This work was performed, in part, at the Center for Integrated Nanotechnologies a U.S. Department of Energy, Office of Basic Energy Sciences Nanoscale Science Research Center operated jointly by Los Alamos and Sandia National Laboratories. Los Alamos National Laboratory, an affirmative action/equal opportunity employer, is operated by Los Alamos National Security, LLC, for the National Nuclear Security Administration of the U.S. Department of Energy under Contract No. DE-AC52-06NA25396. Publisher Copyright: {\textcopyright} 2018 American Chemical Society.",
year = "2018",
month = dec,
day = "12",
doi = "10.1021/acs.nanolett.8b03322",
language = "English",
volume = "18",
pages = "7665--7673",
journal = "Nano Letters",
issn = "1530-6984",
publisher = "American Chemical Society",
number = "12",
}
