Cardiff University | Prifysgol Caerdydd ORCA
Online Research @ Cardiff 
WelshClear Cookie - decide language by browser settings

Low frequency impedance spectroscopy analysis of thermoelectric modules

Garcia Canadas, Jorge and Gao, Min 2014. Low frequency impedance spectroscopy analysis of thermoelectric modules. Journal of Electronic Materials 43 (6) , pp. 2411-2414. 10.1007/s11664-014-3095-4

[thumbnail of 2014-JEM-LowFreq Impedance Modules-GarciaCanadas-Accepted version.pdf]
PDF - Accepted Post-Print Version
Download (353kB) | Preview


Impedance spectroscopy is a well-established technique for the study of semiconductors and energy-related devices. However, in the area of thermoelectrics (TEs), this technique is not frequently used and there is a lack of a physical background for a proper interpretation of the results. Usually, in the low frequency regime, the impedance spectrum of TE modules working in cooling mode is characterized by a semicircle which can be modelled as a parallel connection of a resistor and a capacitor. Here, we present a theoretical analysis to understand the origin of both parameters in bulk TE modules working as Peltier coolers. The analysis introduces a thermoelectric capacitance and a thermoelectric resistance that are defined by the temperature, the Seebeck coefficient and the thermal properties of the module (specific heat and thermal conductivity, respectively). The product of both provides a time constant that directly relates to the thermal diffusivity. Our analysis provides a theoretical model able to interpret the low frequency results and obtain relevant thermal parameters from a single impedance measurement.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Uncontrolled Keywords: Characterisation of thermoelectric modules; ac electrical impedance; thermal constants
Additional Information: Online publication date: March 2014. Post-print self-archived in accordance with publisher's policy at (last accessed 25 April 2014).
Publisher: Springer
ISSN: 0361-5235
Date of First Compliant Deposit: 30 March 2016
Last Modified: 20 Feb 2019 17:15

Citation Data

Cited 32 times in Scopus. View in Scopus. Powered By Scopus® Data

Actions (repository staff only)

Edit Item Edit Item


Downloads per month over past year

View more statistics