High Thermoelectric Performance in Supersaturated Solid Solutions and Nanostructured n-Type PbTe-GeTe
Abstract
Abstract Sb‐doped and GeTe‐alloyed n‐type thermoelectric materials that show an excellent figure of merit ZT in the intermediate temperature range (400–800 K) are reported. The synergistic effect of favorable changes to the band structure resulting in high Seebeck coefficient and enhanced phonon scattering by point defects and nanoscale precipitates resulting in reduction of thermal conductivity are demonstrated. The samples can be tuned as single‐phase solid solution (SS) or two‐phase system with nanoscale precipitates (Nano) based on the annealing processes. The GeTe alloying results in band structure modification by widening the bandgap and increasing the density‐of‐states effective mass of PbTe, resulting in significantly enhanced Seebeck coefficients. The nanoscale precipitates can improve the power factor in the low temperature range and further reduce the lattice thermal conductivity (κ lat ). Specifically, the Seebeck coefficient of Pb 0.988 Sb 0.012 Te–13%GeTe–Nano approaches −280 µV K −1 at 673 K with a low κ lat of 0.56 W m −1 K −1 at 573 K. Consequently, a peak ZT value of 1.38 is achieved at 623 K. Moreover, a high average ZT avg value of ≈1.04 is obtained in the temperature range from 300 to 773 K for n‐type Pb 0.988 Sb 0.012 Te–13%GeTe–Nano.
- Authors:
-
[2]
- Nanyang Technological Univ. (Singapore); Northwestern Univ., Evanston, IL (United States)
- Northwestern Univ., Evanston, IL (United States)
- Univ. of Michigan, Ann Arbor, MI (United States)
- A*STAR (Agency for Science, Technology and Research), Innovis (Singapore)
- Nanyang Technological Univ. (Singapore)
- Publication Date:
- Research Org.:
- Northwestern Univ., Evanston, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Natural Science Foundation of China (NSFC); Singapore MOE AcRF Tier 1; Singapore A*STAR Pharos Program; Nanyang Technological Univ.; National Science Foundation (NSF); International Institute for Nanotechnology; Keck Foundation; State of Illinois
- OSTI Identifier:
- 1775351
- Alternate Identifier(s):
- OSTI ID: 1440785
- Grant/Contract Number:
- SC0014520; 61728401; RG 113/15, 2016-T1-002-065; SERC1527200022; ECCS-1542205; DMR-1121262; DE‐SC0014520; DE‐AC02‐06CH11357; DE‐AC02‐05CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Advanced Functional Materials
- Additional Journal Information:
- Journal Volume: 28; Journal Issue: 31; Journal ID: ISSN 1616-301X
- Publisher:
- Wiley
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; GeTe alloying; n-type PbTe; thermal conductivity; thermoelectric materials
Citation Formats
Luo, Zhong-Zhen, Zhang, Xiaomi, Hua, Xia, Tan, Gangjian, Bailey, Trevor P., Xu, Jianwei, Uher, Ctirad, Wolverton, Chris, Dravid, Vinayak P., Yan, Qingyu, and Kanatzidis, Mercouri G. High Thermoelectric Performance in Supersaturated Solid Solutions and Nanostructured n-Type PbTe-GeTe. United States: N. p., 2018.
Web. doi:10.1002/adfm.201801617.
Luo, Zhong-Zhen, Zhang, Xiaomi, Hua, Xia, Tan, Gangjian, Bailey, Trevor P., Xu, Jianwei, Uher, Ctirad, Wolverton, Chris, Dravid, Vinayak P., Yan, Qingyu, & Kanatzidis, Mercouri G. High Thermoelectric Performance in Supersaturated Solid Solutions and Nanostructured n-Type PbTe-GeTe. United States. https://doi.org/10.1002/adfm.201801617
Luo, Zhong-Zhen, Zhang, Xiaomi, Hua, Xia, Tan, Gangjian, Bailey, Trevor P., Xu, Jianwei, Uher, Ctirad, Wolverton, Chris, Dravid, Vinayak P., Yan, Qingyu, and Kanatzidis, Mercouri G. Wed .
"High Thermoelectric Performance in Supersaturated Solid Solutions and Nanostructured n-Type PbTe-GeTe". United States. https://doi.org/10.1002/adfm.201801617. https://www.osti.gov/servlets/purl/1775351.
@article{osti_1775351,
title = {High Thermoelectric Performance in Supersaturated Solid Solutions and Nanostructured n-Type PbTe-GeTe},
author = {Luo, Zhong-Zhen and Zhang, Xiaomi and Hua, Xia and Tan, Gangjian and Bailey, Trevor P. and Xu, Jianwei and Uher, Ctirad and Wolverton, Chris and Dravid, Vinayak P. and Yan, Qingyu and Kanatzidis, Mercouri G.},
abstractNote = {Abstract Sb‐doped and GeTe‐alloyed n‐type thermoelectric materials that show an excellent figure of merit ZT in the intermediate temperature range (400–800 K) are reported. The synergistic effect of favorable changes to the band structure resulting in high Seebeck coefficient and enhanced phonon scattering by point defects and nanoscale precipitates resulting in reduction of thermal conductivity are demonstrated. The samples can be tuned as single‐phase solid solution (SS) or two‐phase system with nanoscale precipitates (Nano) based on the annealing processes. The GeTe alloying results in band structure modification by widening the bandgap and increasing the density‐of‐states effective mass of PbTe, resulting in significantly enhanced Seebeck coefficients. The nanoscale precipitates can improve the power factor in the low temperature range and further reduce the lattice thermal conductivity (κ lat ). Specifically, the Seebeck coefficient of Pb 0.988 Sb 0.012 Te–13%GeTe–Nano approaches −280 µV K −1 at 673 K with a low κ lat of 0.56 W m −1 K −1 at 573 K. Consequently, a peak ZT value of 1.38 is achieved at 623 K. Moreover, a high average ZT avg value of ≈1.04 is obtained in the temperature range from 300 to 773 K for n‐type Pb 0.988 Sb 0.012 Te–13%GeTe–Nano.},
doi = {10.1002/adfm.201801617},
journal = {Advanced Functional Materials},
number = 31,
volume = 28,
place = {United States},
year = {Wed Jun 06 00:00:00 EDT 2018},
month = {Wed Jun 06 00:00:00 EDT 2018}
}
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