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Pareto optimal spectrally selective emitters for thermophotovoltaics via weak absorber critical coupling (Conference Presentation)
Author(s): Jonathan Foley; Nari Jeon; Alex Martinson; Stephen K Gray; Jonathan Roman; Jonathan Hernandez

Paper Abstract

Tailoring the emission spectra of a thermophotovoltaic emitter away from that of a blackbody has the potential to minimize transmission and thermalization loss in a photovoltaic receiver. Selective thermophotovoltaic emitters could lead to solar energy conversion with efficiency greater than the Shockley-Queisser limit and could facilitate the generation of useful energy from waste heat. We introduce a new design to radically tune thermal emission that leverages the interplay between two resonant phenomena in a simple planar structure – absorption in weakly-absorbing thin films and reflection in multi-layer dielectric stacks. We will discuss a virtual screening approach based on Pareto optimality to identify a small number of promising structures for a selective thermal emitter from a search space of millions, several of which approach the ideal values of a step-function selective thermal emitter. We will also discuss the experimental realization of several simple and optimal structures, estimates of their device-level performance, and ongoing efforts to close the gap between theoretical estimates and experimentally-realized performance of these structures.

Paper Details

Date Published: 18 September 2018
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Proc. SPIE 10759, New Concepts in Solar and Thermal Radiation Conversion and Reliability, 107590O (18 September 2018); doi: 10.1117/12.2325327
Show Author Affiliations
Jonathan Foley, William Paterson University (United States)
Nari Jeon, Argonne National Laboratory (United States)
Alex Martinson, Argonne National Laboratory (United States)
Stephen K Gray, Argonne National Laboratory (United States)
Jonathan Roman, William Paterson University (United States)
Jonathan Hernandez, William Paterson University (United States)


Published in SPIE Proceedings Vol. 10759:
New Concepts in Solar and Thermal Radiation Conversion and Reliability
Jeremy N. Munday; Peter Bermel; Michael D. Kempe, Editor(s)

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