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Review Article

N-Type Mg3Sb2-xBix Alloys as Promising Thermoelectric Materials

Figure 2

(a) Mg3Sb2 contains two unique Mg Wyckoff positions denoted by Mg(1) and Mg(2) and one unique Sb Wyckoff position. Reproduced with permission from Ref. [40]. Copyright 2018 Royal Society of Chemistry. (b) Defect formation energy () of various dopants as a function of the Fermi energy () under the Mg-rich condition [39, 40]. (c) Doping efficiency of some dopants (Te, Se, La, Y, Sc) in Mg3Sb2-xBix at 300 K, with a comparison to ideal doping (dashed lines) assuming that each donor releases one electron [27, 34, 42, 45, 49].