Lanthanide Contraction as a Design Factor for High-Performance Half-Heusler Thermoelectric Materials
Liu Y, Fu C, Xia K, Yu J, Zhao X, Pan H, Felser C, Zhu T (2018)
Publication Type: Journal article
Publication year: 2018
Journal
Book Volume: 30
Article Number: 1800881
Journal Issue: 32
Abstract
Forming solid solutions, as an effective strategy to improve thermoelectric performance, has a dilemma that alloy scattering will reduce both the thermal conductivity and carrier mobility. Here, an intuitive way is proposed to decouple the opposite effects, that is, using lanthanide contraction as a design factor to select alloying atoms with large mass fluctuation but small radius difference from the host atoms. Typical half-Heusler alloys, n-type (Zr,Hf)NiSn and p-type (Nb,Ta)FeSb solid solutions, are taken as paradigms to attest the validity of this design strategy, which exhibit greatly suppressed lattice thermal conductivity and maintained carrier mobility. Furthermore, by considering lanthanide contraction, n-type (Zr,Hf)CoSb-based alloys with high zT of ≈1.0 are developed. These results highlight the significance of lanthanide contraction as a design factor in enhancing the thermoelectric performance and reveal the practical potential of (Zr,Hf)CoSb-based half-Heusler compounds due to the matched n-type and p-type thermoelectric performance.
Involved external institutions
Zhejiang University
China (CN)
Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids
Germany (DE)
China (CN)
Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids
Germany (DE)
How to cite
APA:
Liu, Y., Fu, C., Xia, K., Yu, J., Zhao, X., Pan, H.,... Zhu, T. (2018). Lanthanide Contraction as a Design Factor for High-Performance Half-Heusler Thermoelectric Materials. Advanced Materials, 30(32). https://doi.org/10.1002/adma.201800881
MLA:
Liu, Yintu, et al. "Lanthanide Contraction as a Design Factor for High-Performance Half-Heusler Thermoelectric Materials." Advanced Materials 30.32 (2018).
BibTeX: Download