Ultra-black Pythagorean-tree metasurface antenna array based absorber and emitter for applications in solar thermophotovoltaics

Sumbel Ijaz, Ahsan Sarwar Rana, Muhammad Zubair, Muhammad Qasim Mehmood

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Scopus citations


High temperature tolerance is a crucial need for solar thermal applications. A polarization-insensitive and wide-angle, broadband metasurface absorber and narrowband emitter for solar thermal photovoltaic (STPV) system, which is highly thermally robust, is presented for energy harvesting applications. The absorber has near-unity absorption in visible and near-infrared regions with low emission at longer wavelengths. The STPV systems intend to bar the Shockley-Queisser limit of the conversion efficiency of the PV cell. The presented absorber is a subwavelength refractory plasmonic structure consisting of three layers with top and bottom layers made up of a transition metal nitride (ZrN). It is thermally and chemically stable with a melting point of 3253 K. The impedance of the simulated device matches that of the free space at resonance wavelength, and it has 93.47% average absorption in 400 - 800 nm range. The STPV absorber efficiency (ηabs) of the design presented is 65.42% for blackbody radiation at 5778 K and 65.35% for AM 1.5 spectrum. The emitter exhibits spectral selective behavior to efficiently couple the energy to solar cell and matches the bandgaps of GaInAs, GaAs, and GaInP solar cells (BGs: 1.05 eV, 1.42 eV and 1.85 eV, respectively), with emittance values of 99.05%, 99.57% and 94.78 %, respectively, depending upon dimensions.
Original languageEnglish (US)
Title of host publication2021 1st International Conference on Microwave, Antennas and Circuits, ICMAC 2021
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Print)9781665400862
StatePublished - Jan 1 2021
Externally publishedYes

Bibliographical note

Generated from Scopus record by KAUST IRTS on 2023-09-20


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