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  4. Thermal stability of tungsten based metamaterial emitter under medium vacuum and inert gas conditions
 
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Thermal stability of tungsten based metamaterial emitter under medium vacuum and inert gas conditions

Citation Link: https://doi.org/10.15480/882.2721
Publikationstyp
Journal Article
Date Issued
2020-02-27
Sprache
English
Author(s)
Chirumamilla, Manohar 
Krishnamurthy, Gnanavel Vaidhyanathan  
Rout, Surya Snata  
Ritter, Martin  orcid-logo
Störmer, Michael  
Petrov, Alexander  orcid-logo
Eich, Manfred  
Institut
Optische und Elektronische Materialien E-12  
Betriebseinheit Elektronenmikroskopie M-26  
TORE-DOI
10.15480/882.2721
TORE-URI
http://hdl.handle.net/11420/5427
Journal
Scientific reports  
Volume
10
Issue
1
Article Number
3605
Citation
Scientific Reports 1 (10): 3605 (2020)
Publisher DOI
10.1038/s41598-020-60419-2
Scopus ID
2-s2.0-85081001809
Publisher
Macmillan Publishers Limited, part of Springer Nature
Commercial deployment of thermophotovoltaics (TPV) is lacking behind the implementation of solar PV technology due to limited thermal stability of the selective emitter structures. Most of the TPV emitters demonstrated so far are designed to operate under high vacuum conditions (~10−6 mbar vacuum pressure), whereas under medium vacuum conditions (~10−2 mbar vacuum pressure), which are feasible in technical implementations of TPV, these emitters suffer from oxidation due to significant O2 partial pressure. In this work, the thermal stability of 1D refractory W-HfO2 based multilayered metamaterial emitter structure is investigated under different vacuum conditions. The impact of the O2 partial pressure on thermal stability of the emitters is experimentally quantified. We show that, under medium vacuum conditions, i.e. ~10−2 mbar vacuum pressure, the emitter shows unprecedented thermal stability up to 1300 °C when the residual O2 in the annealing chamber is minimized by encapsulating the annealing chamber with Ar atmosphere. This study presents a significant step in the experimental implementation of high temperature stable emitters under medium vacuum conditions, and their potential in construction of economically viable TPV systems. The high TPV efficiency, ~50% spectral efficiency for GaSb PV cell at 1300 °C, and high temperature stability make this platform well suited for technical application in next-generation TPV systems.
DDC Class
600: Technik
Funding(s)
SFB 986: Teilprojekt C1 - Strukturierte Emitter für effiziente und effektive Thermophotovoltaik  
Publikationsfonds 2020  
More Funding Information
Deutsche Forschungsgemeinschaft (DFG)
Lizenz
https://creativecommons.org/licenses/by/4.0/
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