Thermoelectric transport properties of Pb–Sn–Te–Se system
IV–VI compounds are considered as promising thermoelectric materials, and high thermoelectric performance was achieved in IV–VI solid solutions. In this work, the thermoelectric properties of Pb–Sn–Te–Se-based solid solutions were systematically investigated. Among these solid solutions, it is found that a figure of merit (ZT) peak value of 1.0 at 873 K can be obtained in (PbTe)0.5(SnTe)0.5, on account of the combination of superior electrical properties in SnTe and low thermal conductivity in PbTe. Furthermore, we investigated and summarized the thermoelectric transport properties and proposed the thermoelectric performance maps for the IV–VI solid solutions in Pb–Sn–Te–Se system. This comprehensive investigation on Pb–Sn–Te–Se-based solid solutions can effectively guide and scan thermoelectric performance for a given unknown composition and enhance the thermoelectric properties in IV–VI compounds.
KeywordsThermoelectric materials Electrical conductivity Thermal conductivity Pb–Sn–Te–Se system Solid solutions
This work was financially supported by the National Natural Science Foundation of China (Nos. 51671015, 51571007 and 51772012), the 111 project (No. B17002), the Beijing Municipal Science and Technology Commission (No. Z171100002017002) and the Shenzhen Peacock Plan Team (No. KQTD2016022619565991).
Compliance with ethical standards
On behalf of all the authors, we declare that all the experiments comply with the current laws of the country in which they were performed.
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