Synthesis and characterization of Ge-Ag-Sb-S-Se-Te high-entropy thermoelectric alloys
- Citation:
- Yang, M-J, Yusuf Fakhri M, Liao C-N, Chen K-H. 2022. Synthesis and characterization of Ge-Ag-Sb-S-Se-Te high-entropy thermoelectric alloys, 2022. 311:131617.
Abstract:
Multielement alloying is an appealing approach for suppressing thermal conductivity of thermoelectric materials. In this study, we synthesized GeTe-based high-entropy alloys with notable (S, Se) substitution at Te sites and (Ag, Sb) at Ge sites. The Ge0.82Ag0.08Sb0.1S0.5Se0.1Te0.4 exhibits an extremely low thermal conductivity of ∼ 0.66 W/m⋅K and a high Seebeck coefficient (>250 μV/K) over a temperature range of 150 – 400 °C. The influence of lattice distortion on phase transformation and transport properties of Ge0.9-2xAg2xSb0.1S0.5Se0.1Te0.4 (x = 0 – 0.06) was investigated.
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