Thermoelectric properties of hot-pressed Zn4Sb3−xTex

Enhanced thermoelectric properties of iron doped compound (Zn1−xFex)4Sb3

“…However, one notices that the low-temperature lattice thermal conductivity of S4 # is even larger than S1 # . A similar nonmonotonic behavior of the thermal conductivity with doping content was also observed in In-doped (Zn 1 À x In x ) 4 Sb 3 [14], Nbdoped (Zn 1 À x Nb x ) 4 Sb 3 [19] and Te-doped Zn 4 Sb 3 À x Te x [21] compounds, indicating that this is not a specific phenomenon for Fe-doped Zn 4 Sb 3 , but a relatively universal phenomenon in Zn 4 Sb 3 upon doping. Tsutsui et al [14] and other researchers [19] believed that point defects and lattice distortion were introduced in the lattice because of the large mass difference between them, and the dependence of lattice thermal conductivity on the content of In and Nb was regarded as a solid solution effect.…”

“…Tsutsui et al [14] and other researchers [19] believed that point defects and lattice distortion were introduced in the lattice because of the large mass difference between them, and the dependence of lattice thermal conductivity on the content of In and Nb was regarded as a solid solution effect. But, why the solid solution effect is the strongest (corresponding to the lowest thermal conductivity) at the lightly doped contents in Zn 4 Sb 3 [14,19,21] is still puzzling. Nevertheless, one cannot exclude other factors that can give rise to this non-monotonous behavior of the thermal conductivity of Zn 4 Sb 3 upon doping.…”

“…Recently, doping of Cd, In, Al, Hg, Mg, Nb, Cu, Te and Se [10,[14][15][16][17][18][19][20][21][22][23][24] in Zn 4 Sb 3 have been reported. These studies showed that when doping with Cd, In or Mg, the thermoelectric performance of Zn 4 Sb 3 was not improved obviously.…”

Effect of Bi doping on the thermoelectric properties of Zn4Sb3

“…For Ag doped compounds (Zn 1−x Ag x ) 4 Sb 3 , the lightly doped compound (Zn 0.995 Ag 0.005 ) 4 Sb 3 exhibited the best thermoelectric performance, whose ZT (at 300 K) was about 1.3 times larger than that of the undoped ␤-Zn 4 Sb 3 [23]. In our previous study, we have reported the thermoelectric properties for doped compounds Zn 4 Sb 3−x Te x (x = 0-0.08), and found the ZT was increased with the increasing Te content [24].…”

Effects of Ag doping on thermoelectric properties of Zn4Sb3 at low temperatures

“…Among these, doping approach can be used to enhance the thermoelectric properties by reducing its thermal conductivity and adjusting its carrier concentration [18,19]. Recently, doping of Cd, In, Al, Hg, Mg, Nb, Cu, Te and Se [16,[20][21][22][23][24][25][26][27][28][29] in Zn 4 Sb 3 has been reported. These studies showed that when doping with Cd, In or Mg, the thermoelectric performance of Zn 4 Sb 3 was not improved obviously.…”