Abstract
Thermoelectrics is gaining increased attention as a renewable direct energy conversion method from heat to electricity. The most efficient and up-to-date thermoelectric materials for temperatures of up to 250°C are (Bi1−x Sb x )2 (Te1−y Se y )3 alloys. In the current research, to discover practical thermoelectric power generation devices capable of operation at such temperatures, Bi0.82Sb0.18 alloy was considered as a lead-free high-temperature (<250°C) solder composition for bonding of n-type Bi2Te2.4Se0.6 and p-type Bi0.4Sb1.6Te3 legs into Cu, Ag, Ni and Fe metallic bridges. In the case of Cu, fine contacts with low electrical contact resistance of ∼1.5 ± 0.5 mΩ mm2 were observed upon soldering at 350°C.
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Acknowledgements
The authors would like to thank MAFAT (contract No. 4440585588, 2014) and the Israeli Ministry of Science, Technology and Space (Oil substitutions for transportation grant, 2014) for supporting this research and to Mr. Yair George for the synthesis of the alloys and specimen preparation.
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Vizel, R., Bargig, T., Beeri, O. et al. Bonding of Bi2Te3-Based Thermoelectric Legs to Metallic Contacts Using Bi0.82Sb0.18 Alloy. J. Electron. Mater. 45, 1296–1300 (2016). https://doi.org/10.1007/s11664-015-4003-2
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DOI: https://doi.org/10.1007/s11664-015-4003-2