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

Journal Article · · Journal of Applied Physics
DOI:https://doi.org/10.1063/1.5019764· OSTI ID:1470449

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.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Light-Material Interactions in Energy Conversion (LMI)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0001293
OSTI ID:
1470449
Alternate ID(s):
OSTI ID: 1436010
Journal Information:
Journal of Applied Physics, Vol. 123, Issue 17; Related Information: LMI partners with California Institute of Technology (lead); Harvard University; University of Illinois, Urbana-Champaign; Lawrence Berkeley National Laboratory; ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 32 works
Citation information provided by
Web of Science

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Cited By (8)

Diffusion-driven GaInP/GaAs light-emitting diodes enhanced by modulation doping journal March 2019
Ultra-low-power sub-photon-voltage high-efficiency light-emitting diodes journal June 2019
Near-field photonic cooling through control of the chemical potential of photons journal February 2019
On the temperature dependence of the efficiency of electroluminescence journal November 2019
Self-sustaining thermophotonic circuits journal May 2019
Effect of Evanescent Waves on the Dark Current of Thermophotovoltaic Cells journal October 2019
Parametric optimum design of a near-field electroluminescent refrigerator journal June 2019
Redefining near-unity luminescence in quantum dots with photothermal threshold quantum yield journal March 2019