Abstract
Cu2−δSe is an eco-friendly thermoelectric candidate owing to Cu ions migration in its high-temperature beta phase, and meanwhile the liquid-like Cu ions deteriorate the stability and reliability of materials. Here, Pb2+ ion was introduced into the Cu1.98Se lattice to improve the thermoelectric properties and the stability. The Pb-doped Cu1.98−xPbxSe (x = 0–0.035) compounds prepared by a facile solvothermal synthesis and microwave sintering. The obtained results reveal that the power factor of the doped samples greatly improved up to 1454 μW m−1 K−2 at 800 K, which was about 22.5% higher than that of undoped Cu1.98Se. In addition, after 3 cycles of testing, the power factor of Cu1.98Se decreased by 57% at 800 K, and that of Cu1.965Pb0.015Se decreased by less than 30%.
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This work is supported by Tianjin research program of application foundation and advanced technology under award number 15JCYBJC18500.
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Li, H., Du, X., Cao, L. et al. Effects of Pb doping on the electrical transport performance of Cu1.98Se. J Mater Sci 55, 2905–2912 (2020). https://doi.org/10.1007/s10853-019-04242-9
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DOI: https://doi.org/10.1007/s10853-019-04242-9