Ultra-high Seebeck coefficient of nanostructured Sb-substituted PbTe and fabrication of a thermoelectric generator module

Sreeram, P R; Nair, N. Unnikrishnan; Dayal, G.; Thomas, Sabu; Anantharaman, M. R.

doi:10.1007/s12034-020-02262-9

Cited by 6 publications

(3 citation statements)

References 42 publications

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“…Similar findings have been reported in a series of works. 37–41 The density of states effective mass m d * and S may be represented as:where F i ( ξ F ) is the Fermi integral of order i , ξ F is the reduced Fermi level E F / k B T , and h is the Planck constant. Here, we assume that acoustic phonon scattering is dominant in the Pb 0.97 Sb 0.03 Te compound, or λ = 0 for Pb 0.97 Sb 0.03 Te.…”

Section: Resultsmentioning

confidence: 99%

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Achieving higher thermoelectric performance of n-type PbTe by adjusting the band structure and enhanced phonon scattering

Zhu

Ming

et al. 2022

Nanoscale

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Section: Resultsmentioning

confidence: 99%

“…Using a single parabolic band model, λ is computed to confirm that the energy filtering effect enhances the Seebeck coefficient S. Similar findings have been reported in a series of works. [37][38][39][40][41] The density of states effective mass m d * and S may be represented as:…”

Section: Resultsmentioning

confidence: 99%

Achieving higher thermoelectric performance of n-type PbTe by adjusting the band structure and enhanced phonon scattering

Zhu

Ming

et al. 2022

Nanoscale

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“…However, the search for high ZT materials has been challenging due to the inherent interrelationships between these parameters. [3,4] Various strategies have been employed to improve the ZT of thermoelectric materials, including doping, nanostructuring, and optimizing the electronic band structure. [5,6] For years, degenerated semiconductors composed of heavy elements containing chalcogenides such as Bi 2 Te 3 and PbTe have been studied as a conventional and highly efficient thermoelectric material.…”

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confidence: 99%

Thermoelectric Transport of a Novel Zr‐Based Half‐Heusler High‐Entropy Alloy

Adamo,

Srivastava,

Legese

et al. 2023

Energy Tech

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The high‐entropy concept, extensively studied in alloys and ceramics, has produced intriguing results, but its use in thermoelectric materials is still in its infancy. This study introduces a pioneering high‐entropy half‐Heusler (hH) alloy, ZrTiNiFeSnSb, synthesized via arc melting and heat treatment. Phonon scattering from multiple elements significantly reduces the lattice thermal conductivity of the alloy, which decreases to a minimum of 3.5 Wm−1 K−1 (700 K) in this material. The experimental thermal data matches the density functional theory calculations for phonon dispersion, phonon group velocity, and Grüneisen parameters. This demonstrates that crystal distortion induced anharmonicity slows the alloy's phonon heat transport, which is suitable for thermoelectric applications. Notably possessing elevated electrical conductivity and a moderate Seebeck coefficient, this high‐entropy hH alloy emerges as a promising thermoelectric material for energy harvesting.

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Enhanced Thermoelectric Performance of Nanostructured 2D Tin Telluride

Singh,

Karthik,

Sreeram

et al. 2024

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A lot of experimental studies are conducted on theoretically predicted thermoelectric 2D materials. Such materials can pave the way for charging ultra‐thin electronic devices, self‐charging wearable devices, and medical implants. This study systematically explores the thermoelectric attributes of bulk and 2D nanostructured Tin Telluride (SnTe), employing experimental investigations and theoretical analyses based on semiclassical Boltzmann transport theory. The bulk SnTe is synthesized through flame melting, while the 2D SnTe is produced via liquid phase exfoliation. The comprehensive assessment of thermoelectric properties integrated experimental measurements utilizing a Physical Property Measurement System and theoretical calculations from the BoltzTraP code. Experimental thermoelectric studies show a high ZT of 0.17 for 2D SnTe when compared to bulk (0.005) at room temperature. This rise in ZT is due to the high Seebeck coefficient and low thermal conductivity of nanostructured 2D SnTe. Density functional theory (DFT) studies reveal the contribution of the density of states (DOS) and energy bandgap in enhancing the Seebeck coefficient and lowering thermal conductivity by interface scattering.

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Ultra-high Seebeck coefficient of nanostructured Sb-substituted PbTe and fabrication of a thermoelectric generator module

Cited by 6 publications

References 42 publications

Achieving higher thermoelectric performance of n-type PbTe by adjusting the band structure and enhanced phonon scattering

Achieving higher thermoelectric performance of n-type PbTe by adjusting the band structure and enhanced phonon scattering

Thermoelectric Transport of a Novel Zr‐Based Half‐Heusler High‐Entropy Alloy

Enhanced Thermoelectric Performance of Nanostructured 2D Tin Telluride

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