Increasing the thermoelectric power factor of Ge17Sb2Te20 by adjusting the Ge/Sb ratio
Abstract
Here, we have investigated the thermoelectric properties of Ge17Sb2Te20. This compound is a known phase change material with electronic properties that depend strongly on temperature. The thermoelectric properties of this compound can be tuned by altering the stoichiometry of Ge and Sb without the use of additional foreign elements during synthesis. This tuning results in a 26% increase in the thermoelectric power factor at 723 K. Based on a single parabolic band model we show that the pristine material is optimally doped, and thus, a reduction in the lattice thermal conductivity of pure Ge17Sb2Te20 should result in an enhanced thermoelectric figure of merit.
- Authors:
-
- Michigan State Univ., East Lansing, MI (United States)
- Univ. of Michigan, Ann Arbor, MI (United States)
- Publication Date:
- Research Org.:
- Energy Frontier Research Centers (EFRC), Washington, D.C. (United States). Revolutionary Materials for Solid State Energy Conversion (RMSSEC)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1397217
- Alternate Identifier(s):
- OSTI ID: 1372715
- Grant/Contract Number:
- SC0001054
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Journal of Applied Physics
- Additional Journal Information:
- Journal Volume: 122; Journal Issue: 4; Related Information: RMSSEC partners with Michigan State University (lead); University of California, Los Angeles; University of Michigan; Northwestern University; Oak Ridge National Laboratory; Ohio State University; Wayne State University; Journal ID: ISSN 0021-8979
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Williams, Jared B., Mather, Spencer P., Page, Alexander, Uher, Ctirad, and Morelli, Donald T. Increasing the thermoelectric power factor of Ge17Sb2Te20 by adjusting the Ge/Sb ratio. United States: N. p., 2017.
Web. doi:10.1063/1.4995430.
Williams, Jared B., Mather, Spencer P., Page, Alexander, Uher, Ctirad, & Morelli, Donald T. Increasing the thermoelectric power factor of Ge17Sb2Te20 by adjusting the Ge/Sb ratio. United States. https://doi.org/10.1063/1.4995430
Williams, Jared B., Mather, Spencer P., Page, Alexander, Uher, Ctirad, and Morelli, Donald T. 2017.
"Increasing the thermoelectric power factor of Ge17Sb2Te20 by adjusting the Ge/Sb ratio". United States. https://doi.org/10.1063/1.4995430. https://www.osti.gov/servlets/purl/1397217.
@article{osti_1397217,
title = {Increasing the thermoelectric power factor of Ge17Sb2Te20 by adjusting the Ge/Sb ratio},
author = {Williams, Jared B. and Mather, Spencer P. and Page, Alexander and Uher, Ctirad and Morelli, Donald T.},
abstractNote = {Here, we have investigated the thermoelectric properties of Ge17Sb2Te20. This compound is a known phase change material with electronic properties that depend strongly on temperature. The thermoelectric properties of this compound can be tuned by altering the stoichiometry of Ge and Sb without the use of additional foreign elements during synthesis. This tuning results in a 26% increase in the thermoelectric power factor at 723 K. Based on a single parabolic band model we show that the pristine material is optimally doped, and thus, a reduction in the lattice thermal conductivity of pure Ge17Sb2Te20 should result in an enhanced thermoelectric figure of merit.},
doi = {10.1063/1.4995430},
url = {https://www.osti.gov/biblio/1397217},
journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 4,
volume = 122,
place = {United States},
year = {Wed Jul 26 00:00:00 EDT 2017},
month = {Wed Jul 26 00:00:00 EDT 2017}
}
Web of Science
Figures / Tables:
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Works referencing / citing this record:
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