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High temperature selective emitters via critical coupling of weak absorbers

Patent ·
OSTI ID:1771569
Tailoring the emission spectra of a solar thermophotovoltaic emitter away from that of a blackbody, thereby minimizing transmission and thermalization loss in the energy receiver, is a viable approach to circumventing the Shockley-Queisser limit to single junction solar energy conversion. Embodiments allow for radically tuned selective 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. A virtual screening approach is employed 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.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC02-06CH11357; W-31109-ENG-38
Assignee:
UChicago Argonne, LLC (Chicago, IL); William Paterson University of New Jersey (Wayne, NJ)
Patent Number(s):
10,819,270
Application Number:
15/923,909
OSTI ID:
1771569
Country of Publication:
United States
Language:
English

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