Applicability limits of time-domain impedance spectroscopy for comprehensive thermoelectric characterization under heat leakage conditions.

ABSTRACT: We measured the complete set of thermoelectric parameters using the time-domain impedance spectroscopy (TDIS) method with controlled heat leakage on a bismuth-telluride-based Π-shaped thermoelectric module over the temperature range of 100-300 K. The resistivity and dimensionless figure of merit (zT) were determined to be 2.341 µΩ m and 0.111 ± 0.001 at 100 K, and 10.194 µΩ m and 0.8645 ± 0.0003 at 300 K, respectively. The corresponding thermal conductivities were 2.443 ± 0.396 W/m K at 100 K and 1.259 ± 0.003 W/m K at 300 K. Based on the definition of zT, the absolute values of the Seebeck coefficient were calculated as 79.74 ± 8.72 µV/K at 100 K and 192.32 ± 0.93 µV/K at 300 K as effective values. These results confirm that the TDIS method enables complete thermoelectric characterization

SUBMITTER: Hasegawa Y 

PROVIDER: S-EPMC12916901 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature