Rare-Earth Nd Inducing Record-High Thermoelectric Performance of (GeTe)85(AgSbTe2)15
Article
Article Title | Rare-Earth Nd Inducing Record-High Thermoelectric Performance of (GeTe)85(AgSbTe2)15 |
---|---|
Article Category | Article |
Authors | Lyu, Wan Yu (Author), Hong, Min (Author), Liu, Wei Di (Author), Li, Meng (Author), Sun, Qiang (Author), Xu, Sheng Duo (Author), Zou, Jin (Author) and Chen, Zhi-Gang (Author) |
Journal Title | Energy Material Advances |
Journal Citation | 2021, pp. 1-8 |
Article Number | 2414286 |
Number of Pages | 8 |
Year | 2021 |
Publisher | American Association for the Advancement of Science (AAAS) |
Place of Publication | United States |
ISSN | 2692-7640 |
Digital Object Identifier (DOI) | https://doi.org/10.34133/2021/2414286 |
Web Address (URL) | https://spj.sciencemag.org/journals/energymatadv/2021/2414286/ |
Abstract | As a promising midtemperature thermoelectric material with both higher thermoelectric performance and mechanical property, Tellurium Antimony Germanium Silver (TAGS-x), written as (GeTe)x(AgSbTe2)1-x, especially (GeTe)0.85(AgSbTe2)0.15 (TAGS-85), has attracted wide attention. Herein, we innovatively use Nd doping to synergistically decrease the carrier concentration to the optimal level leading to enhanced dimensionless figure of merit, zT. Our density-functional theory calculation results indicate that Nd-doping reduced carrier concentration should be attributed to the enlargement of band gap. The optimized carrier concentration results in an ultrahigh power factor of ~32 μW cm-1 K-2 at 727 K in Ge0.74Ag0.13Sb0.11Nd0.02Te. Simultaneously, the lattice thermal conductivity of Ge0.74Ag0.13Sb0.11Nd0.02Te retained as low as ~0.5 at 727 K. Ultimately, a record-high zT of 1.65 at 727 K is observed in the Ge0.74Ag0.13Sb0.11Nd0.02Te. This study indicates rare-earth Nd doping is effective in boosting the thermoelectric performance of TAGS-85 and approached a record-high level via synergistic effect. |
Keywords | Tellurium Antimony Germanium Silver (TAGS-x), (GeTe)x(AgSbTe2)1-x, midtemperature thermoelectric materials, thermoelectric performance, mechanical properties |
Related Output | |
Is part of | Design and optimization of high-performance GeTe-based thermoelectric materials |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 510404. Electronic and magnetic properties of condensed matter; superconductivity |
Public Notes | This article is part of a UniSQ Thesis by publication. See Related Output. |
Byline Affiliations | Centre for Future Materials |
University of Queensland | |
Institution of Origin | University of Southern Queensland |
Funding source | Australian Research Council (ARC) |
https://research.usq.edu.au/item/q6q75/rare-earth-nd-inducing-record-high-thermoelectric-performance-of-gete-85-agsbte2-15
Download files
200
total views103
total downloads2
views this month1
downloads this month