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

Yi Wang, Xiaoyu Chong, Yong Jie Hu, Shun Li 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 2019

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All Science Journal Classification (ASJC) codes

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

Cite this

Wang, Y., Chong, X., Hu, Y. J., Shang, S. L., Drymiotis, F. R., Firdosy, S. A., Star, K. E., Fleurial, J. P., Ravi, V. A., Chen, L. Q., & Liu, Z. K. (2019). An alternative approach to predict Seebeck coefficients: Application to La3−xTe4. Scripta Materialia, 169, 87-91. https://doi.org/10.1016/j.scriptamat.2019.05.014