標題: Effect of Thermoelectric Cooling in Nanoscale Junctions
作者: Liu, Yu-Shen
Hsu, Bailey C.
Chen, Yu-Chang
電子物理學系
Department of Electrophysics
公開日期: 7-四月-2011
摘要: We propose a thermoelectric cooling device based on an atomic-sized junction. Using first-principles approaches, we investigate the working conditions and the coefficient of performance (COP) of an atomic-scale electronic refrigerator where the effects of the phonon's thermal current and local heating are included. It is observed that the functioning of the thermoelectric nanorefrigerator is restricted to a narrow range of driving voltages. Compared with the bulk thermoelectric system with the overwhelmingly irreversible Joule heating, the 4-Al atomic refrigerator has a higher efficiency than a bulk thermoelectric refrigerator with the same thermoelectric figure of merit (ZT) due to suppressed local heating via the quasi-ballistic electron transport and small driving voltages. Quantum nature due to the size minimization offered by atomic-level control of properties facilitates electron cooling beyond the expectation of the conventional thermoelectric device theory.
URI: http://dx.doi.org/10.1021/jp110920q
http://hdl.handle.net/11536/9010
ISSN: 1932-7447
DOI: 10.1021/jp110920q
期刊: JOURNAL OF PHYSICAL CHEMISTRY C
Volume: 115
Issue: 13
起始頁: 6111
結束頁: 6125
顯示於類別:期刊論文


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