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Review Article

N-Type Mg3Sb2-xBix Alloys as Promising Thermoelectric Materials

Figure 3

Electronic properties and structures of Mg3Sb2-xBix. (a) Temperature-dependent Hall mobility [25]. (b) Temperature-dependent electrical conductivity and electron backscatter diffraction (EBSD) crystal orientation maps. Reproduced with permission from Ref. [53]. Copyright 2018 American Institute of Physics. (c) Projected atomic density map from 3D APT measurement showing the planar Mg-deficiency defect (arrow); (d) such Mg deficiency in the grain boundary region (gray area, top panel) induces a higher Mg vacancy (Mg2-) concentration (bottom panel). Reproduced with permission from Ref. [56]. Copyright 2019 John Wiley and Sons. (e) Temperature-dependent weighted mobility [57]. Reproduced with permission from Ref. 50. Copyright 2020 John Wiley and Sons.