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Enhancement of Thermoelectric Efficiency in PbTe by Distortion of the Electronic Density of States
Abstract
The efficiency of thermoelectric energy converters is limited by the material thermoelectric figure of merit ( zT ). The recent advances in zT based on nanostructures limiting the phonon heat conduction is nearing a fundamental limit: The thermal conductivity cannot be reduced below the amorphous limit. We explored enhancing the Seebeck coefficient through a distortion of the electronic density of states and report a successful implementation through the use of the thallium impurity levels in lead telluride (PbTe). Such band structure engineering results in a doubling of zT in p -type PbTe to above 1.5 at 773 kelvin. Use of this new physical principle in conjunction with nanostructuring to lower the thermal conductivity could further enhance zT and enable more widespread use of thermoelectric systems.
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Cites
Enhanced thermoelectric performance of rough silicon nanowires
Hochbaum, A. I., Chen, R., Delgado, R. D., Liang, W., Garnett, E. C., Najarian, M., Majumdar, A., & Yang, P. (2008) · Nature · doi:10.1038/nature06381 · Cited by 4,109
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He, J., & Tritt, T. M. (2017) · Science · doi:10.1126/science.aak9997 · Cited by 2,767
Copper ion liquid-like thermoelectrics
Liu, H., Shi, X., Xu, F., Zhang, L., Zhang, W., Chen, L., Li, Q., Uher, C., Day, T., & Snyder, G. J. (2012) · Nature Materials · doi:10.1038/nmat3273 · Cited by 2,118
Self-citationPhotocurrent generation with two-dimensional van der Waals semiconductors
Buscema, M., Island, J. O., Groenendijk, D. J., Blanter, S. I., Steele, G. A., van der Zant, H. S. J., & Castellanos-Gomez, A. (2015) · Chemical Society Reviews · doi:10.1039/c5cs00106d · Cited by 1,051
Resonant levels in bulk thermoelectric semiconductors
Heremans, J. P., Wiendlocha, B., & Chamoire, A. M. (2012) · Energy Environ. Sci. · doi:10.1039/c1ee02612g · Cited by 965
Self-citationHigh Thermoelectric Performance in Non‐Toxic Earth‐Abundant Copper Sulfide
He, Y., Day, T., Zhang, T., Liu, H., Shi, X., Chen, L., & Snyder, G. J. (2014) · Advanced Materials · doi:10.1002/adma.201400515 · Cited by 788
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Metadata
- Authors
- Heremans, J. P., Jovovic, V., Toberer, E. S., Saramat, A., Kurosaki, K., Charoenphakdee, A., Yamanaka, S., & Snyder, G. J.
- Venue
- Science
- Published
- 2008-07-25
- Volume
- 321
- Issue
- 5888
- Pages
- 554-557
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W2045048386
- Cited by
- 4,161
- References
- 1
- FWCI
- 50.52
- Type
- journal article
- Language
- en
- Open access
- closed
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- Heremans, J. P., Jovovic, V., Toberer, E. S., Saramat, A., Kurosaki, K., Charoenphakdee, A., Yamanaka, S., & Snyder, G. J. (2008). Enhancement of Thermoelectric Efficiency in PbTe by Distortion of the Electronic Density of States. Science. https://doi.org/10.1126/science.1159725
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