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 |