InAs and InSb as Thermoelectric Materials

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Abstract
Measurements of the electrical conductivity, thermal conductivity, and Seebeck coefficient (thermoelectric power) of InSb and InAs have been made at high temperatures. The thermoelectric figure of merit (S2σ/κ) averaged 0.42×10−3 °K−1 between 100 and 500°C for InSb and 0.44×10−3 °K−1 between 500 and 750°C for InAs. Hence n‐InAs and InSb in series may be used to generate electrical power with an efficiency of about 6% when used in conjunction with p‐type materials of similar characteristics. In neither InSb up to 500° nor InAs up to 800°C did the thermal conductivity show the large high‐temperature anomaly previously reported in InSb.