open access publication

Article, 2021

Spectrally selective emitters based on 3D Mo nanopillars for thermophotovoltaic energy harvesting

Materials Today Physics, ISSN 2542-5293, Volume 21, Page 100503, 10.1016/j.mtphys.2021.100503

Contributors

Chirumamilla, Anisha [1] [2] Yang, Yuanqing 0000-0001-7139-1254 [3] Salazar, Maria H [1] Ding, Fei 0000-0001-7362-519X [3] Wang, Deyong [2] Kristensen, Peter Kjær 0000-0001-7260-0548 [2] Fojan, Peter 0000-0002-0626-4766 [2] Bozhevolnyi, Sergey I 0000-0002-0393-4859 [3] Sutherland, Duncan Stewart 0000-0002-5045-9915 [1] Pedersen, Kjeld 0000-0002-6835-1566 [2] Chirumamilla, Manohar 0000-0002-6812-286X (Corresponding author) [2] [4]

Affiliations

  1. [1] Aarhus University
    2. [NORA names: AU Aarhus University; University; Denmark; Europe, EU; Nordic; OECD];
  2. [2] Aalborg University
    3. [NORA names: AAU Aalborg University; University; Denmark; Europe, EU; Nordic; OECD];
  3. [3] University of Southern Denmark
    4. [NORA names: SDU University of Southern Denmark; University; Denmark; Europe, EU; Nordic; OECD];
  4. [4] Hamburg University of Technology
    5. [NORA names: Germany; Europe, EU; OECD]

Abstract

High-temperature stable emitters with spectral selective functionality are an absolute condition for efficient conversion of thermal radiation into electricity using thermophotovoltaic (TPV) systems. Usually, spectral selective emitters are made up of multilayered materials or geometrical structures resulting from complex fabrication processes. Here, we report a spectrally selective emitter based on a single metal layer coating of molybdenum (Mo) over a 3D dielectric pillar geometry. 3D Mo nanopillars are fabricated using large-area and cost-effective hole-mask colloidal lithography. These nanostructures show an absorptivity/emissivity of 95% below the cut-off wavelength of an InGaAsSb PV cell at 2.25 μm, and a sharp decline in absorptivity/emissivity in the near-infrared regions, approaching a low emissivity of 10%. The 3D Mo nanopillars show outstanding thermal/structural stability up to 1473 K for 24 h duration under Ar atmosphere and polarization and angle invariance up to 60° incidence angles. With a low-cost and scalable fabrication method, 3D Mo nanostructures provide tremendous opportunities in TPV and high temperature photonic/plasmonic applications.

Keywords

Ar atmosphere, InGaAsSb, InGaAsSb PV cells, Mo, Mo nanostructures, PV cells, TPV, absolute condition, absorptivity/emissivity, angle, angle invariance, applications, atmosphere, cells, coating, colloidal lithography, complex fabrication process, conditions, conversion of thermal radiation, cut-off wavelength, decline, duration, efficient conversion, electricity, emission, emitter, energy harvesting, fabrication, fabrication method, fabrication process, function, geometric structure, geometry, harvest, hole-mask colloidal lithography, incidence, incident angle, invariance, large-area, layer coating, lithography, low cost, low emissions, materials, metal, metal layer coating, method, molybdenum, multilayer materials, nanopillars, nanostructures, near-infrared region, opportunities, pillar geometry, polarization, process, radiation, region, selection function, selective emitter, spectrally, spectrally selective emitter, stability, stable emitters, structure, thermal radiation, thermal/structural stability, wavelength

Funders

  • Deutsche Forschungsgemeinschaft
  • Novo Nordisk (Denmark)
  • The Velux Foundations

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