Journal
MATERIALS
Volume 10, Issue 8, Pages -Publisher
MDPI
DOI: 10.3390/ma10080885
Keywords
near-field thermal radiation; thermophotovoltaics; Mie-metamaterials; effective medium theory
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Funding
- Institutional Development Award (IDeA) Network for Biomedical Research Excellence from National Institute of General Medical Sciences of the National Institutes of Health [P20GM103430]
- Rhode Island STAC Research Grant [AWD05085]
- Rhode Island Foundation Research Grant [20164342]
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In this work, we theoretically analyze the performance characteristics of a near-field thermophotovoltaic system consisting a Mie-metamaterial emitter and GaSb-based photovoltaic cell at separations less than the thermal wavelength. The emitter consists of a tungsten nanoparticle-embedded thin film of SiO2 deposited on bulk tungsten. Numerical results presented here are obtained using formulae derived from dyadic Green's function formalism and Maxwell-Garnett-Mie theory. We show that via the inclusion of tungsten nanoparticles, the thin layer of SiO2 acts like an effective medium that enhances selective radiative heat transfer for the photons above the band gap of GaSb. We analyze thermophotovoltaic (TPV) performance for various volume fractions of tungsten nanoparticles and thicknesses of SiO2.
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