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
Related Articles
- EP ID EP294482
- DOI -
- Views 88
- Downloads 0
Dynamics of Properties of Laser Beams for Surface Hardening of Metals and Enrichment of Uranium and Transuranic Elements (Review)
In this article considered consequence scientific achievement in laser technology which carry out in last time,and actual in development electron trreat equipment material analisis basic position warmth model evaporation...
The Thickness Dependence of Thermoelectric Parameters of thin Films Based on Compounds LAST
The thermoelectric properties of thin films based on compounds PbSnAgTe, obtained by condensation of vapor on the high vacuum on mica substrate are researched. Based on a two-layer model Petrits are founded electrical pa...
Effect of Ionizing Radiation on the Structure, Electro-Physical and Optical Characteristics of Cd1-xZnxTe Crystals
Based on X-ray studies, conditions for growth of high structural perfect Cd1-хZnxTe (0,02≤х≤0,1) crystalshave been optimized. In crystals obtained, changes in the structure, electrical parameters and optical transmission...
Model of Mass Crystallization in Layers of Small Thickness
The model of mass crystallization, which allows to take into account the blocking effect of the growing crystals by surfaces of thin layers of melt or rapidly quenched amorphous ribbons is proposed. The kinetic equations...
The Influence of Nanodispersed Silver/Alumina Addition on the Rheological Properties of Melts and Phase Transitions in Polypropylene/Copolyamide Blends
There is concentration influence of nanodispersed silver/alumina addition combined on appropriatenesses of polypropylene/copoliamide mixture melt flow studied. There are dependences of swelling and viscosity from Ag/Al2O...