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Title: Electroluminescent refrigeration by ultra-efficient GaAs light-emitting diodes

Abstract

Electroluminescence—the conversion of electrons to photons in a light-emitting diode (LED)—can be used as a mechanism for refrigeration, provided that the LED has an exceptionally high quantum efficiency. We investigate the practical limits of present optoelectronic technology for cooling applications by optimizing a GaAs/GaInP double heterostructure LED. We develop a model of the design based on the physics of detailed balance and the methods of statistical ray optics, and predict an external luminescence efficiency of ηext = 97.7% at 263 K. To enhance the cooling coefficient of performance, we pair the refrigerated LED with a photovoltaic cell, which partially recovers the emitted optical energy as electricity. For applications near room temperature and moderate power densities (1.0–10 mW/cm2), we project that an electroluminescent refrigerator can operate with up to 1.7× the coefficient of performance of thermoelectric coolers with ZT = 1, using the material quality in existing GaAs devices. We also predict superior cooling efficiency for cryogenic applications relative to both thermoelectric and laser cooling. Large improvements to these results are possible with optoelectronic devices that asymptotically approach unity luminescence efficiency.

Authors:
ORCiD logo [1];  [2];  [2];  [2]; ORCiD logo [1]
  1. Univ. of California, Berkeley, CA (United States)
  2. Stanford Univ., CA (United States)
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Light-Material Interactions in Energy Conversion (LMI)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1470449
Alternate Identifier(s):
OSTI ID: 1436010
Grant/Contract Number:  
SC0001293
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 123; Journal Issue: 17; Related Information: LMI partners with California Institute of Technology (lead); Harvard University; University of Illinois, Urbana-Champaign; Lawrence Berkeley National Laboratory; Journal ID: ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; solar (photovoltaic); solid state lighting; phonons, thermal conductivity; electrodes - solar; materials and chemistry by design; optics; synthesis (novel materials); synthesis (self-assembly)

Citation Formats

Xiao, T. Patrick, Chen, Kaifeng, Santhanam, Parthiban, Fan, Shanhui, and Yablonovitch, Eli. Electroluminescent refrigeration by ultra-efficient GaAs light-emitting diodes. United States: N. p., 2018. Web. doi:10.1063/1.5019764.
Xiao, T. Patrick, Chen, Kaifeng, Santhanam, Parthiban, Fan, Shanhui, & Yablonovitch, Eli. Electroluminescent refrigeration by ultra-efficient GaAs light-emitting diodes. United States. doi:10.1063/1.5019764.
Xiao, T. Patrick, Chen, Kaifeng, Santhanam, Parthiban, Fan, Shanhui, and Yablonovitch, Eli. Fri . "Electroluminescent refrigeration by ultra-efficient GaAs light-emitting diodes". United States. doi:10.1063/1.5019764. https://www.osti.gov/servlets/purl/1470449.
@article{osti_1470449,
title = {Electroluminescent refrigeration by ultra-efficient GaAs light-emitting diodes},
author = {Xiao, T. Patrick and Chen, Kaifeng and Santhanam, Parthiban and Fan, Shanhui and Yablonovitch, Eli},
abstractNote = {Electroluminescence—the conversion of electrons to photons in a light-emitting diode (LED)—can be used as a mechanism for refrigeration, provided that the LED has an exceptionally high quantum efficiency. We investigate the practical limits of present optoelectronic technology for cooling applications by optimizing a GaAs/GaInP double heterostructure LED. We develop a model of the design based on the physics of detailed balance and the methods of statistical ray optics, and predict an external luminescence efficiency of ηext = 97.7% at 263 K. To enhance the cooling coefficient of performance, we pair the refrigerated LED with a photovoltaic cell, which partially recovers the emitted optical energy as electricity. For applications near room temperature and moderate power densities (1.0–10 mW/cm2), we project that an electroluminescent refrigerator can operate with up to 1.7× the coefficient of performance of thermoelectric coolers with ZT = 1, using the material quality in existing GaAs devices. We also predict superior cooling efficiency for cryogenic applications relative to both thermoelectric and laser cooling. Large improvements to these results are possible with optoelectronic devices that asymptotically approach unity luminescence efficiency.},
doi = {10.1063/1.5019764},
journal = {Journal of Applied Physics},
number = 17,
volume = 123,
place = {United States},
year = {2018},
month = {5}
}

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Cited by: 10 works
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