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

Journal
Materials today  
Volume
21
Article Number
100503
Citation
Materials Today Physics 21: 100503 (2021-11)
Publisher DOI
10.1016/j.mtphys.2021.100503
Scopus ID
2-s2.0-85112546023
Publisher
Elsevier
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.
Subjects
3D nanopillars
Gap plasmon resonator
High temperature stability
Molybdenum
Spectrally selective emitters
DDC Class
530: Physik
600: Technik
Funding(s)
SFB 986: Teilprojekt C1 - Strukturierte Emitter für effiziente und effektive Thermophotovoltaik  
Funding Organisations
Deutsche Forschungsgemeinschaft (DFG)  
More Funding Information
F. Ding acknowledges the support from Villum Fonden (grant nos. 00022988 and37372). K. Pedersen acknowledges the financial support from the Novo Nordisk, grant number NNF20OC0064735.
Publication version
publishedVersion
Lizenz
https://creativecommons.org/licenses/by/4.0/
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