Photothermoelectric (PTE) characterization of CuCrO2 and Cu4Sn7S16 thermoelectric materials

C. Tripon (1) , D. Dadarlat (1) , C. Bourges (2) , P. Lemoine (3, 2) , E. Guilmeau (2)

1 INCDTIM - National Institute for Research and Development of Isotopic and Molecular Technologies
2 CRISMAT - Laboratoire de cristallographie et sciences des matériaux
3 ISCR - Institut des Sciences Chimiques de Rennes

The recently developed photothermoelectric (PTE) calorimetry was applied to measure the thermal parameters of CuCrO2 and Cu4Sn7S16 thermoelectric materials. Both back and front PTE detection configurations were combined to directly measure the thermal diffusivity and effusivity of the above-mentioned solid thermoelectrics. In the back configuration, CuCrO2 (Seebeck coefficient approximately + 1200 A mu V K-1) was used as a thermoelectric sensor and CuCrO2 and Cu4Sn7S16 as samples. In the front detection, both CuCrO2 and Cu4Sn7S16 (Seebeck coefficient approximately - 600 A mu V K-1) materials were alternatively used as sensors, the sample being in this case a thermally thick layer of silicone grease. The proposed combination of configurations eliminates any possible results degeneracy because each fitting procedure involves only one fitting parameter. The results obtained by PTE investigations alpha (CuCrO2) = 1.19 x 10(-6) m(2) s(-1), alpha (Cu4Sn7S16) = 0.33 x 10(-6) m(2) s(-1) and e (CuCrO2) = 780 W s(1/2) m(-2) K-1, e (Cu4Sn7S16) = 1358 W s(1/2) m(-2) K-1 were validated by photopyroelectric (PPE) measurements.

Keywords: Thermoelectric materials; Photothermoelectric technique; Photopyroelectric technique; Thermal parameters

Domains: Chemical Sciences

C. Tripon, D. Dadarlat, C. Bourges, P. Lemoine, E. Guilmeau. Photothermoelectric (PTE) characterization of CuCrO2 and Cu4Sn7S16 thermoelectric materials. Journal of Thermal Analysis and Calorimetry, 2018, 131 (3), pp.3151-3156. ⟨10.1007/s10973-017-6819-x⟩. ⟨hal-01737374⟩