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.

Elyamny, S., Dimaggio, E., Magagna, S., Narducci, D., Pennelli, G. (2020). High Power Thermoelectric Generator Based on Vertical Silicon Nanowires. NANO LETTERS, 20(7), 4748-4753 [10.1021/acs.nanolett.0c00227].

High Power Thermoelectric Generator Based on Vertical Silicon Nanowires

Magagna S.
Membro del Collaboration Group
;
Narducci D.
Membro del Collaboration Group
;
2020

Abstract

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.
Articolo in rivista - Articolo scientifico
power density; silicon nanowires; thermal conductivity; thermoelectricity;
English
2020
20
7
4748
4753
reserved
Elyamny, S., Dimaggio, E., Magagna, S., Narducci, D., Pennelli, G. (2020). High Power Thermoelectric Generator Based on Vertical Silicon Nanowires. NANO LETTERS, 20(7), 4748-4753 [10.1021/acs.nanolett.0c00227].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/282284
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