The DOI matches its Crossref record; 25 of the 25 references it cites were found in a registry or an index.
Origin of the High Performance in GeTe-Based Thermoelectric Materials upon Bi2Te3 Doping
Abstract
As a lead-free material, GeTe has drawn growing attention in thermoelectrics, and a figure of merit (ZT) close to unity was previously obtained via traditional doping/alloying, largely through hole carrier concentration tuning. In this report, we show that a remarkably high ZT of ∼1.9 can be achieved at 773 K in Ge0.87Pb0.13Te upon the introduction of 3 mol % Bi2Te3. Bismuth telluride promotes the solubility of PbTe in the GeTe matrix, thus leading to a significantly reduced thermal conductivity. At the same time, it enhances the thermopower by activating a much higher fraction of charge transport from the highly degenerate Σ valence band, as evidenced by density functional theory calculations. These mechanisms are incorporated and discussed in a three-band (L + Σ + C) model and are found to explain the experimental results well. Analysis of the detailed microstructure (including rhombohedral twin structures) in Ge0.87Pb0.13Te + 3 mol % Bi2Te3 was carried out using transmission electron microscopy and crystallographic group theory. The complex microstructure explains the reduced lattice thermal conductivity and electrical conductivity as well.
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Cites
Complex thermoelectric materials
Snyder, G. J., & Toberer, E. S. (2008) · Nature Materials · doi:10.1038/nmat2090 · Cited by 11,455
Ultralow thermal conductivity and high thermoelectric figure of merit in SnSe crystals
Zhao, L.-D., Lo, S.-H., Zhang, Y., Sun, H., Tan, G., Uher, C., Wolverton, C., Dravid, V. P., & Kanatzidis, M. G. (2014) · Nature · doi:10.1038/nature13184 · Cited by 5,218
Self-citationHigh-performance bulk thermoelectrics with all-scale hierarchical architectures
Biswas, K., He, J., Blum, I. D., Wu, C.-I., Hogan, T. P., Seidman, D. N., Dravid, V. P., & Kanatzidis, M. G. (2012) · Nature · doi:10.1038/nature11439 · Cited by 4,740
Self-citationConvergence of electronic bands for high performance bulk thermoelectrics
Pei, Y., Shi, X., LaLonde, A., Wang, H., Chen, L., & Snyder, G. J. (2011) · Nature · doi:10.1038/nature09996 · Cited by 4,263
Enhancement of Thermoelectric Efficiency in PbTe by Distortion of the Electronic Density of States
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Band Engineering of Thermoelectric Materials
Pei, Y., Wang, H., & Snyder, G. J. (2012) · Advanced Materials · doi:10.1002/adma.201202919 · Cited by 1,793
The panoscopic approach to high performance thermoelectrics
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Self-citationSemiconducting Lead Chalcogenides
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High thermoelectric figure of merit in heavy hole dominated PbTe
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Cited by
Rationally Designing High-Performance Bulk Thermoelectric Materials
Tan, G., Zhao, L.-D., & Kanatzidis, M. G. (2016) · Chemical Reviews · doi:10.1021/acs.chemrev.6b00255 · Cited by 2,355
Self-citationHigh figure-of-merit and power generation in high-entropy GeTe-based thermoelectrics
Jiang, B., Wang, W., Liu, S., Wang, Y., Wang, C., Chen, Y., Xie, L., Huang, M., & He, J. (2022) · Science · doi:10.1126/science.abq5815 · Cited by 729
Self-citationMao, J., Liu, Z., Zhou, J., Zhu, H., Zhang, Q., Chen, G., & Ren, Z. (2018) · Advances in Physics · doi:10.1080/00018732.2018.1551715 · Cited by 592
Guo, R., Wang, X., Kuang, Y., & Huang, B. (2015) · Physical Review B · doi:10.1103/physrevb.92.115202 · Cited by 527
Tan, G., Shi, F., Hao, S., Chi, H., Zhao, L.-D., Uher, C., Wolverton, C., Dravid, V. P., & Kanatzidis, M. G. (2015) · Journal of the American Chemical Society · doi:10.1021/jacs.5b00837 · Cited by 502
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Metadata
- Authors
- Wu, D., Zhao, L.-D., Hao, S., Jiang, Q., Zheng, F., Doak, J. W., Wu, H., Chi, H., Gelbstein, Y., Uher, C., Wolverton, C., Kanatzidis, M., & He, J.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2014-08-04
- Volume
- 136
- Issue
- 32
- Pages
- 11412-11419
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2331081388
- Cited by
- 388
- References
- 25
- FWCI
- 11.61
- Type
- journal article
- Language
- en
- Open access
- closed
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