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Title: High efficiency rare-earth emitter for thermophotovoltaic applications

Abstract

In this work, we propose a rare-earth-based ceramic thermal emitter design that can boost thermophotovoltaic (TPV) efficiencies significantly without cold-side filters at a temperature of 1573 K (1300 °C). The proposed emitter enhances a naturally occurring rare earth transition using quality-factor matching, with a quarter-wave stack as a highly reflective back mirror, while suppressing parasitic losses via exponential chirping of a multilayer reflector transmitting only at short wavelengths. This allows the emissivity to approach the blackbody limit for wavelengths overlapping with the absorption peak of the rare-earth material, while effectively reducing the losses associated with undesirable long-wavelength emission. We obtain TPV efficiencies of 34% using this layered design, which only requires modest index contrast, making it particularly amenable to fabrication via a wide variety of techniques, including sputtering, spin-coating, and plasma-enhanced chemical vapor deposition.

Authors:
; ;  [1]
  1. Birck Nanotechnology Center, School of Electrical and Computer Engineering, Purdue University, 1205 W. State St., West Lafayette, Indiana 47907 (United States)
Publication Date:
OSTI Identifier:
22303485
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 105; Journal Issue: 11; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ABSORPTION; CERAMICS; CHEMICAL VAPOR DEPOSITION; EFFICIENCY; EMISSION; EMISSIVITY; FABRICATION; FILTERS; LAYERS; LOSSES; PLASMA; QUALITY FACTOR; RARE EARTH COMPOUNDS; SPIN-ON COATING; SPUTTERING; THERMOPHOTOVOLTAIC CONVERSION; WAVELENGTHS

Citation Formats

Sakr, E. S., Zhou, Z., and Bermel, P., E-mail: pbermel@purdue.edu. High efficiency rare-earth emitter for thermophotovoltaic applications. United States: N. p., 2014. Web. doi:10.1063/1.4895932.
Sakr, E. S., Zhou, Z., & Bermel, P., E-mail: pbermel@purdue.edu. High efficiency rare-earth emitter for thermophotovoltaic applications. United States. doi:10.1063/1.4895932.
Sakr, E. S., Zhou, Z., and Bermel, P., E-mail: pbermel@purdue.edu. Mon . "High efficiency rare-earth emitter for thermophotovoltaic applications". United States. doi:10.1063/1.4895932.
@article{osti_22303485,
title = {High efficiency rare-earth emitter for thermophotovoltaic applications},
author = {Sakr, E. S. and Zhou, Z. and Bermel, P., E-mail: pbermel@purdue.edu},
abstractNote = {In this work, we propose a rare-earth-based ceramic thermal emitter design that can boost thermophotovoltaic (TPV) efficiencies significantly without cold-side filters at a temperature of 1573 K (1300 °C). The proposed emitter enhances a naturally occurring rare earth transition using quality-factor matching, with a quarter-wave stack as a highly reflective back mirror, while suppressing parasitic losses via exponential chirping of a multilayer reflector transmitting only at short wavelengths. This allows the emissivity to approach the blackbody limit for wavelengths overlapping with the absorption peak of the rare-earth material, while effectively reducing the losses associated with undesirable long-wavelength emission. We obtain TPV efficiencies of 34% using this layered design, which only requires modest index contrast, making it particularly amenable to fabrication via a wide variety of techniques, including sputtering, spin-coating, and plasma-enhanced chemical vapor deposition.},
doi = {10.1063/1.4895932},
journal = {Applied Physics Letters},
issn = {0003-6951},
number = 11,
volume = 105,
place = {United States},
year = {2014},
month = {9}
}