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Publisher DOI: 10.1016/j.mtphys.2021.100503
Title: Spectrally selective emitters based on 3D Mo nanopillars for thermophotovoltaic energy harvesting
Language: English
Authors: Chirumamilla, Anisha 
Yang, Yuanqing 
Salazar, Maria H. 
Ding, Fei 
Wang, Deyong 
Kristensen, Peter Kjær 
Fojan, Peter 
Bozhevolnyi, Sergey 
Sutherland, Duncan S. 
Pedersen, Kjeld 
Chirumamilla, Manohar 
Keywords: 3D nanopillars;Gap plasmon resonator;High temperature stability;Molybdenum;Spectrally selective emitters
Issue Date: 10-Aug-2021
Publisher: Elsevier
Source: Materials Today Physics 21: 100503 (2021-11)
Journal: Materials today 
Abstract (english): 
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.
DOI: 10.15480/882.3759
ISSN: 2542-5293
Institute: Optische und Elektronische Materialien E-12 
Document Type: Article
Funded by: 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.
Project: SFB 986: Teilprojekt C1 - Strukturierte Emitter für effiziente und effektive Thermophotovoltaik 
License: CC BY 4.0 (Attribution) CC BY 4.0 (Attribution)
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