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Title: Heterogeneous metasurface for high temperature selective emission

We demonstrate selective emission from a heterogeneous metasurface that can survive repeated temperature cycling at 1300 K. Simulations, fabrication, and characterization were performed for a cross-over-a-backplane metasurface consisting of platinum and alumina layers on a sapphire substrate. The structure was stabilized for high temperature operation by an encapsulating alumina layer. The geometry was optimized for integration into a thermophotovoltaic (TPV) system, and was designed to have its emissivity matched to the external quantum efficiency spectrum of 0.6 eV InGaAs TPV material. We present spectral measurements of the metasurface that result in a predicted 22% optical-to-electrical power conversion efficiency in a simplified model at 1300 K. Furthermore, this broadly adaptable selective emitter design can be easily integrated into full-scale TPV systems.
Authors:
;  [1] ; ; ; ;  [2]
  1. Physical Sciences, Inc., 20 New England Business Center, Andover, Massachusetts 01810 (United States)
  2. Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185 (United States)
Publication Date:
OSTI Identifier:
22310936
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 8; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ALUMINIUM OXIDES; CONVERSION; EMISSION; EMISSIVITY; EV RANGE; GALLIUM ARSENIDES; INDIUM COMPOUNDS; LAYERS; PHOTOVOLTAIC CELLS; PLATINUM; QUANTUM EFFICIENCY; SAPPHIRE; SIMULATION; SPECTRA; SUBSTRATES; TEMPERATURE RANGE 1000-4000 K