An alternative approach to predict Seebeck coefficients: Application to La3−xTe4

Yi Wang, Xiaoyu Chong, Yong Jie Hu, Shunli Shang, Fivos R. Drymiotis, Samad A. Firdosy, Kurt E. Star, Jean Pierre Fleurial, Vilupanur A. Ravi, Long-qing Chen, Zi-kui Liu

Research output: Contribution to journalArticle

Abstract

A thermodynamic understanding of Seebeck coefficient was demonstrated in terms of electrochemical potential. It divided the contributions to the Seebeck coefficient into two contributions: the effect of thermal electronic excitations due to Fermi distribution and the effect of charge carrier gradient due to thermal expansion. The procedure is illustrated within the rigid band approximation in terms of the electronic density-of-states and the quasiharmonic approximation in terms of the phonon density-of-states. Numerical results were given using the n-type high temperature thermoelectric material La3-xTe4 at x = 0, 0.25, and 0.33 as the prototype at a variety of carrier concentrations.

Original languageEnglish (US)
Pages (from-to)87-91
Number of pages5
JournalScripta Materialia
Volume169
DOIs
StatePublished - Aug 1 2019

Fingerprint

Seebeck coefficient
Seebeck effect
Electronic density of states
thermoelectric materials
Charge carriers
approximation
electronics
Thermal expansion
Carrier concentration
charge carriers
thermal expansion
prototypes
Thermodynamics
gradients
thermodynamics
excitation
Temperature
Hot Temperature

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

Cite this

Wang, Yi ; Chong, Xiaoyu ; Hu, Yong Jie ; Shang, Shunli ; Drymiotis, Fivos R. ; Firdosy, Samad A. ; Star, Kurt E. ; Fleurial, Jean Pierre ; Ravi, Vilupanur A. ; Chen, Long-qing ; Liu, Zi-kui. / An alternative approach to predict Seebeck coefficients : Application to La3−xTe4. In: Scripta Materialia. 2019 ; Vol. 169. pp. 87-91.
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Wang, Y, Chong, X, Hu, YJ, Shang, S, Drymiotis, FR, Firdosy, SA, Star, KE, Fleurial, JP, Ravi, VA, Chen, L & Liu, Z 2019, 'An alternative approach to predict Seebeck coefficients: Application to La3−xTe4', Scripta Materialia, vol. 169, pp. 87-91. https://doi.org/10.1016/j.scriptamat.2019.05.014

An alternative approach to predict Seebeck coefficients : Application to La3−xTe4. / Wang, Yi; Chong, Xiaoyu; Hu, Yong Jie; Shang, Shunli; Drymiotis, Fivos R.; Firdosy, Samad A.; Star, Kurt E.; Fleurial, Jean Pierre; Ravi, Vilupanur A.; Chen, Long-qing; Liu, Zi-kui.

In: Scripta Materialia, Vol. 169, 01.08.2019, p. 87-91.

Research output: Contribution to journalArticle

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AU - Wang, Yi

AU - Chong, Xiaoyu

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AU - Shang, Shunli

AU - Drymiotis, Fivos R.

AU - Firdosy, Samad A.

AU - Star, Kurt E.

AU - Fleurial, Jean Pierre

AU - Ravi, Vilupanur A.

AU - Chen, Long-qing

AU - Liu, Zi-kui

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AB - A thermodynamic understanding of Seebeck coefficient was demonstrated in terms of electrochemical potential. It divided the contributions to the Seebeck coefficient into two contributions: the effect of thermal electronic excitations due to Fermi distribution and the effect of charge carrier gradient due to thermal expansion. The procedure is illustrated within the rigid band approximation in terms of the electronic density-of-states and the quasiharmonic approximation in terms of the phonon density-of-states. Numerical results were given using the n-type high temperature thermoelectric material La3-xTe4 at x = 0, 0.25, and 0.33 as the prototype at a variety of carrier concentrations.

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