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The Effect Of Thermotunneling On The Thermoelectric Figure Of Merit

机译：热隧穿对热电性能的影响

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摘要

Thermotunneling terms the thermoelectric effect in narrow tunnel junctions associated with a temperature gradient across the tunnel junction as the driving force for electron transport. The thermoelectric figure of merit characterizes the suitability of a material in applications for thermoelectric energy conversion. An advantage of thermotunneling in vacuum tunnel junctions is the complete blocking of heat transfer by phonons raising hope for improved thermoelectric conversion efficiency of future thermotunneling devices. However, thermotunneling is generally accompanied by radiative heat transfer enhanced by photon tunneling. Using analytical modeling the paper studies the combined influence of both electronic and radiative heat transfer on the thermoelectric figure of merit of a thermotunneling junction to assess the potential of thermotunneling devices for improvements in conversion efficiency. Based on a free electron model applied to highly reflective low resistivity metals as material of the junction electrodes it is found that the thermotunneling figure of merit is significantly less than the dimen-sionless thermoelectric figure of merit around 1 of the best thermoelectric materials known.
机译：热隧道法将狭窄的隧道结中的热电效应与跨隧道结的温度梯度相关联，作为电子传输的驱动力。热电性能因数表征材料在热电能量转换应用中的适用性。真空隧道结中的热隧道技术的一个优势是，声子完全阻止了热传递，从而为改善未来热隧道技术的热电转换效率带来了希望。然而，热隧道通常伴随着光子隧穿增强的辐射热传递。本文使用分析模型研究了电子传热和辐射传热对热隧道结的热电性能因数的综合影响，以评估热隧道装置改善转换效率的潜力。基于应用于结点材料的高反射率低电阻金属的自由电子模型，发现热隧穿品质因数显着小于已知的最佳热电材料之一的无因次热电因数。

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