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Thermionic cooling devices based on resonant-tunneling AlGaAs/GaAs heterostructure

Abstract : We study by means of full quantum simulations the operating principle and performance of a semiconductor heterostructure refrigerator combining resonant tunneling filtering and thermionic emission. Our model takes into account the coupling between the electric and thermal currents by self-consistently solving the transport equations within the non-equilibrium Green's function framework and the heat equation. We show that the device can achieve relatively high cooling power values, while in the considered implementation, the maximum lattice temperature drop is severely limited by the thermal conductivity of the constituting materials. In such an out-of-equilibrium structure, we then emphasize the significant deviation of the phonon temperature from its electronic counterpart which can vary over several hundred Kelvin. The interplay between those two temperatures and the impact on the electrochemical potential is also discussed. Finally, viable options toward an optimization of the device are proposed.
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Contributor : Nicolas Cavassilas Connect in order to contact the contributor
Submitted on : Tuesday, January 25, 2022 - 2:58:59 PM
Last modification on : Thursday, January 27, 2022 - 3:40:37 AM
Long-term archiving on: : Tuesday, April 26, 2022 - 6:55:19 PM


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M. Bescond, D. Logoteta, M Michelini, N. Cavassilas, T Yan, et al.. Thermionic cooling devices based on resonant-tunneling AlGaAs/GaAs heterostructure. Journal of Physics: Condensed Matter, IOP Publishing, 2018, 30 (6), ⟨10.1088/1361-648X/aaa4cf⟩. ⟨hal-01761821⟩



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