Enhanced Thermoelectric Performance of Lightly Pb-Doped Sb₂Te₃ Polycrystalline Alloys for Power Generation in Midtemperature Range

Figure 4

Thermal transport properties of the Sb_2–PbTe₃ samples. (a, c) Total thermal conductivity and (b, d) lattice thermal conductivity, as functions of temperature along the PE and PA directions, respectively. The insets in (a) and (c) show the electron thermal conductivity as a function of temperature along the PE and PA directions, respectively.

(a)

(b)

(c)

(d)