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High Power Thermoelectric Generator Based on Vertical Silicon Nanowires.
Nano Letters ( IF 10.8 ) Pub Date : 2020-05-28 , DOI: 10.1021/acs.nanolett.0c00227
Shaimaa Elyamny 1, 2 , Elisabetta Dimaggio 1 , Stefano Magagna 3 , Dario Narducci 3 , Giovanni Pennelli 1
Affiliation  

Thermoelectric generators, which convert heat directly into electrical power, have great potentialities in the energy harvesting field. The exploitation of these potentialities is limited by the materials currently used, characterized by good thermoelectric properties, but also by several drawbacks. This work presents a silicon-based thermoelectric generator, made of a large collection of heavily p-doped silicon nanostructures. This macroscopic device (area of several mm2) collects together the good thermoelectric features of silicon, in terms of high power factor, and a very reduced thermal conductivity, which resulted in being exceptionally low (1.8 W/(m K), close to the amorphous limit). The generated electrical power density is remarkably high for a Si-based thermoelectric generator, and it is suitable for scavenging applications which can exploit small temperature differences. A full characterization of the device (Seebeck coefficient, thermal conductivity, maximum power output) is reported and discussed.

中文翻译:

基于垂直硅纳米线的大功率热电发电机。

将热量直接转换成电能的热电发电机在能量收集领域具有巨大的潜力。这些潜力的开发受到当前使用的材料的限制,这些材料的特点是具有良好的热电性能,但同时也存在一些缺点。这项工作提出了一种基于硅的热电发生器,它由大量的重掺杂p的硅纳米结构组成。该宏观装置(面积为几毫米2)将高功率因数和非常低的导热率结合在一起,从而获得了硅的良好热电特性,从而导致其异常低(1.8 W /(m K),接近非晶极限)。硅基热电发电机产生的电功率密度非常高,并且适用于可以利用较小温差的扫气应用。报告并讨论了该器件的完整特性(塞贝克系数,热导率,最大功率输出)。
更新日期:2020-07-08
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