Non-linear impedance spectroscopy for complete thermoelectric characterization: Beyond the zT estimation
Year: 2018
Type: article
Abstract: Thermoelectric measurement of the dimensionless zT=α2Tσ/κ parameter requires multiple physical quantities to be measured; therefore, there is great interest to find an experimental setup capable of measuring all these properties at once. Previous works on impedance spectroscopy have shown promising results in this direction; however, this technique does not lead to a complete characterization of the thermoelectric system without additional measurement. In order to extend impedance spectroscopy, we have investigated the measurement of the non-linear harmonic response of a Peltier device. The experiments are analyzed using an analytic model obtained by solving the heat equation in the frequency regime. Our work shows that fitting the experimental response of the system in the harmonic regime can lead to a complete characterization of the thermoelectric properties without the need of additional measurement.
Source: Journal of Applied Physics
DOI: 10.1063/1.5063419
Authors: E. Thiébaut, F. Pesty, C. Goupil, G. Guegan, P. Lecoeur
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2809748751