Thermoelectric Nanocomposite Materials Based on Doped Lead Telluride (Review)
Journal Title: Фізика і хімія твердого тіла - Year 2014, Vol 15, Issue 1
Abstract
A review of the problems of obtaining and research complex thermoelectric properties of composite materials doped Update the various elements of the periodic table of lead telluride semiconductor promising compound for medium temperature region (500-850) K. Found that the doping of lead telluride elements Na and K, in the content of more than 0.5 at.% Observed the formation of nano-sized particles, and the maximum value of the thermoelectric figure of merit (ZT) for PbTe: Na1, 75 at.% 1.6. When doped Lead Telluride III elements of the periodic table form resonant states within the allowed zones, resulting in a significant increase in thermopower, the maximum value of which is 360 μV/K and ZT = 1,6. When doping Sb and Bi nanoparticles are formed that contribute to strong scattering by acoustic phonons, which contributes to a significant decrease in thermal conductivity. When doped PbTe La and I formed a very small donor states, so each dopant atom adds one electron in the conduction band, in general ZT values for these materials is 1.2. When europium doped PbTe formed nanoparticles clearly improves thermal conductivity that varies (1,4-2,4) W/m•K.
Authors and Affiliations
O. S. Krunutcky
Keywords
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