Optimization of the carrier concentration in phase-separated half-Heusler compounds

Krez J, Schmitt J, Snyder GJ, Felser C, Hermes W, Schwind M (2014)

Publication Type: Journal article

Publication year: 2014

Journal

Journal of Materials Chemistry A Royal Society of Chemistry

Book Volume: 2

Pages Range: 13513-13518

Journal Issue: 33

DOI: 10.1039/c4ta03000a

Abstract

Inspired by the promising thermoelectric properties of phase-separated half-Heusler materials, we investigated the influence of electron doping in the n-type Ti0.3-xZr0.35Hf0.35NiSn compound. The addition of Nb to this compound led to a significant increase in its electrical conductivity, and shifted the maximum Seebeck coefficient to higher temperatures owing to the suppression of intrinsic carriers. This resulted in an enhancement of both the power factor α2σ and figure of merit, zT. The applicability of an average effective mass model revealed the optimized electron properties for samples containing Nb. There is evidence in the literature that the average effective mass model is suitable for estimating the optimized carrier concentration of thermoelectric n-type half-Heusler compounds. This journal is © the Partner Organisations 2014.

Involved external institutions

Johannes Gutenberg-Universität Mainz (JGU) DE Germany (DE) California Institute of Technology (Caltech) US United States (USA) (US) BASF SE DE Germany (DE) Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids DE Germany (DE)

How to cite

APA:

Krez, J., Schmitt, J., Snyder, G.J., Felser, C., Hermes, W., & Schwind, M. (2014). Optimization of the carrier concentration in phase-separated half-Heusler compounds. Journal of Materials Chemistry A, 2(33), 13513-13518. https://doi.org/10.1039/c4ta03000a

MLA:

Krez, Julia, et al. "Optimization of the carrier concentration in phase-separated half-Heusler compounds." Journal of Materials Chemistry A 2.33 (2014): 13513-13518.

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