Research / 2020 / Article / Fig 7

Review Article

Defects Engineering with Multiple Dimensions in Thermoelectric Materials

Figure 7

Planar defects and related physical effect in thermoelectric materials. (a) Hall mobility and carrier concentration of single crystals and polycrystalline materials with different grain sizes in Bi2Te3-based alloys. Data are from Ref. [62, 115119]. (b) Temperature-dependent lattice thermal conductivity of Bi2Te3-based alloys. Data are from Ref. [18, 117, 119, 121]. (c) TEM images showing the clean grain boundaries of Bi0.5Sb1.5Te3 nanograins [18]. Reproduced with permission from the American Association for the Advancement of Science. (d) TEM image, SAED image, and simulated crystal structure of (BiS)1.2(TiS2)2 showing the stack faults [129]. (e) Temperature-dependent lattice thermal conductivity of TiS2 and (MS)1+(TiS2)2 (M = Pb, Sn, and Bi) [129]. Reproduced with permission from AIP Publishing.