Journal ArticleDOI
Variation of electrical transport properties and thermoelectric figure of merit with thickness in 1% excess Te-doped Pb0.2Sn0.8Te thin films
V. Damodara Das,C. Bahulayan +1 more
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TLDR
In this article, the authors used the effective mean free path model of classical size effect theory to explain the thickness dependence of the electrical resistivity and thermoelectric power observed.Abstract:
Pb0.2Sn0.8Te thin films of different thicknesses have been deposited on glass substrates by flash evaporation. Electrical resistivity and thermoelectric power measurements have been carried out in the temperature range 300-500 K as a function of film thickness. The thickness dependence of the electrical resistivity and thermoelectric power observed has been explained using the effective mean free path model of classical size effect theory. The thermoelectric power factor was calculated from the measured values of electrical resistivity and thermoelectric power. The thermoelectric power factor is found to be dependent on thickness and temperature. By taking thermal conductivity values from the literature, the thermoelectric figure of merit was also calculated and it was found that this too was dependent on the temperature and thickness.read more
Citations
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Solvothermal synthesis of PbTe/SnTe hybrid nanocrystals
TL;DR: PbTe/SnTe hybrid nanocrystals with designed shape, chemical composition and narrow size distribution were synthesized by an efficient solvothermal approach as discussed by the authors, which enabled mass and economical synthesis of PbTe-based nanocrystal.
Journal ArticleDOI
Structural, Thermal, Optical, and Photoacoustic Study of Mechanically Alloyed Nanocrystalline SnTe
Z. V. Borges,C.M. Poffo,João Cardoso de Lima,Sérgio Michielon de Souza,Daniela Menegon Trichês,Ronaldo Sergio de Biasi +5 more
TL;DR: In this paper, a nanostructured SnTe phase was produced by mechanical alloying after 2 h of milling, and part of the as-milled powder was annealed and its X-ray diffraction (XRD) pattern was recorded.
References
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Journal ArticleDOI
Electrical-Resistivity Model for Polycrystalline Films: the Case of Arbitrary Reflection at External Surfaces
A. F. Mayadas,M. Shatzkes +1 more
TL;DR: In this paper, the total resistivity of a thin metal film is calculated from a model in which three types of electron scattering mechanisms are simultaneously operative: an isotropic background scattering (due to the combined effects of phonons and point defects), scattering due to a distribution of planar potentials (grain boundaries), and scattering by the external surfaces.
Journal ArticleDOI
The conductivity of thin metallic films according to the electron theory of metals
TL;DR: In this paper, the conductivity of thin films of the alkali metals has been measured in the H. W. Wills Physical Laboratory, Bristol and the experimental results were compared with a formula derived on the basis of this hypothesis.
Journal ArticleDOI
Band Structure and Laser Action in Pb x Sn 1-x Te
Journal ArticleDOI
Optimum band gap of a thermoelectric material.
TL;DR: It is found that the optimum gap is always greater than 6${\mathit{k}}_{B}}$T, but can be much larger depending on the specific mechanism of electron scattering.
Journal ArticleDOI
Figure of merit for thermoelectrics
TL;DR: Theoretical calculations for the figure of merit Z in thermoelectrics are presented in this article, where the maximum values of Z are obtained in semiconductors which are doped so that the chemical potential is near the band edge.
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