Thermoelectric properties of nonstoichiometric PbTe prepared by HPHT

Effects of Annealing Temperature on the Thermoelectric Properties and Microstructure of Ag0.6Pb18Sb5Te20

“…When heated sufficiently, the electrons, originally in valence bands, are excited by heat over a wide range and acquire sufficient energy to overcome the narrow energy gap. (15) show that the semiconductor property for the resistivity of PbTe decreases at high temperature, (10) which is very similar to our experimental results. It is our hypothesis that Ag doping may change the PbTe density of states at the Fermi level.…”

Mechanochemical synthesis of high thermoelectric performance bulk Cu2X (X = S, Se) materials

“…[18][19][20][31][32][33] In a few other cases, high pressure is applied in conjunction with high temperature to obtain specific phases and/or to attain special electronic band structures. [34][35][36][37][38] Unlike most other chemical reactions that are ignited and sustained by heat, the process we herein report is basically mechanochemical. In this work, stoichiometric admixture of Cu (4 N, 200 mesh) and S/Se (5 N, 100 mesh) powders is hand ground in an agate mortar and cold pressed into a pellet of 15 mm diameter.…”

Thermoelectric properties of single crystalline Ba8AlxSi46-xclathrate by using flux Czochralski method

“…The figure of merit is defined as ZT = S 2 T/ρκ, where S is the Seebeck coefficient, T is the absolute temperature, ρ is the specific electric resistance and κ is the thermal conductivity. Several kinds of thermoelectric materials, such as BiTe, PbTe, and SiGe, have been studied, but these materials have problems such as a low melting point, harmfulness, and high cost for practical applications [5,6,7]. Recently, some research on other thermoelectric materials has been performed [8,9].…”