High Thermoelectric Performance in Polycrystalline SnSe Via Dual-Doping with Ag/Na and Nanostructuring With Ag8 SnSe6
Abstract
Abstract Single crystalline SnSe is one of the most intriguing new thermoelectric materials but the thermoelectric performance of polycrystalline SnSe seems to lag significantly compared to that of a single crystal. Here an effective strategy for enhancing the thermoelectric performance of p‐type polycrystalline SnSe by Ag/Na dual‐doping and Ag 8 SnSe 6 (STSe) nanoprecipitates is reported. The Ag/Na dual‐doping leads to a two orders of magnitude increase in carrier concentration and a convergence of valence bands (VBM 1 and VBM 5 ), which in turn results in sharp enhancement of electrical conductivities and high Seebeck coefficients in the Ag/Na dual‐doped samples. Additionally, the SnSe matrix becomes nanostructured with dispersed nanoprecipitates of the compound Ag 8 SnSe 6 , which further strengthens the scattering of phonons. Specifically, ≈20% reduction in the already ultralow lattice thermal conductivity is realized for the Sn 0.99 Na 0.01 Se–STSe sample at 773 K compared to the thermal conductivity of pure SnSe. Consequently, a peak thermoelectric figure of merit ZT of 1.33 at 773 K with a high average ZT (ZT ave ) value of 0.91 (423–823 K) is achieved for the Sn 0.99 Na 0.01 Se–STSe sample.
- Authors:
-
[2]
- Nanyang Technological Univ. (Singapore); Northwestern Univ., Evanston, IL (United States)
- Northwestern Univ., Evanston, IL (United States)
- Nanyang Technological Univ. (Singapore)
- Agency for Science, Technology and Research (A*STAR), Innovis (Singapore). Institute of Materials Research and Engineering
- 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)
- OSTI Identifier:
- 1776868
- Alternate Identifier(s):
- OSTI ID: 1483725
- Grant/Contract Number:
- SC0014520; AC02-06CH11357; AC02-05CH11231; 2016-T1-002-065; DE‐SC0014520; DE‐AC02‐06CH11357; DE‐AC02‐05CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Advanced Energy Materials
- Additional Journal Information:
- Journal Volume: 9; Journal Issue: 2; Journal ID: ISSN 1614-6832
- Publisher:
- Wiley
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; AgSnSe; SnSe; dual-doping; nanostructuring; thermoelectrics
Citation Formats
Luo, Yubo, Cai, Songting, Hua, Xia, Chen, Haijie, Liang, Qinghua, Du, Chengfeng, Zheng, Yun, Shen, Junhua, Xu, Jianwei, Wolverton, Chris, Dravid, Vinayak P., Yan, Qingyu, and Kanatzidis, Mercouri G. High Thermoelectric Performance in Polycrystalline SnSe Via Dual-Doping with Ag/Na and Nanostructuring With Ag8 SnSe6. United States: N. p., 2018.
Web. doi:10.1002/aenm.201803072.
Luo, Yubo, Cai, Songting, Hua, Xia, Chen, Haijie, Liang, Qinghua, Du, Chengfeng, Zheng, Yun, Shen, Junhua, Xu, Jianwei, Wolverton, Chris, Dravid, Vinayak P., Yan, Qingyu, & Kanatzidis, Mercouri G. High Thermoelectric Performance in Polycrystalline SnSe Via Dual-Doping with Ag/Na and Nanostructuring With Ag8 SnSe6. United States. https://doi.org/10.1002/aenm.201803072
Luo, Yubo, Cai, Songting, Hua, Xia, Chen, Haijie, Liang, Qinghua, Du, Chengfeng, Zheng, Yun, Shen, Junhua, Xu, Jianwei, Wolverton, Chris, Dravid, Vinayak P., Yan, Qingyu, and Kanatzidis, Mercouri G. Wed .
"High Thermoelectric Performance in Polycrystalline SnSe Via Dual-Doping with Ag/Na and Nanostructuring With Ag8 SnSe6". United States. https://doi.org/10.1002/aenm.201803072. https://www.osti.gov/servlets/purl/1776868.
@article{osti_1776868,
title = {High Thermoelectric Performance in Polycrystalline SnSe Via Dual-Doping with Ag/Na and Nanostructuring With Ag8 SnSe6},
author = {Luo, Yubo and Cai, Songting and Hua, Xia and Chen, Haijie and Liang, Qinghua and Du, Chengfeng and Zheng, Yun and Shen, Junhua and Xu, Jianwei and Wolverton, Chris and Dravid, Vinayak P. and Yan, Qingyu and Kanatzidis, Mercouri G.},
abstractNote = {Abstract Single crystalline SnSe is one of the most intriguing new thermoelectric materials but the thermoelectric performance of polycrystalline SnSe seems to lag significantly compared to that of a single crystal. Here an effective strategy for enhancing the thermoelectric performance of p‐type polycrystalline SnSe by Ag/Na dual‐doping and Ag 8 SnSe 6 (STSe) nanoprecipitates is reported. The Ag/Na dual‐doping leads to a two orders of magnitude increase in carrier concentration and a convergence of valence bands (VBM 1 and VBM 5 ), which in turn results in sharp enhancement of electrical conductivities and high Seebeck coefficients in the Ag/Na dual‐doped samples. Additionally, the SnSe matrix becomes nanostructured with dispersed nanoprecipitates of the compound Ag 8 SnSe 6 , which further strengthens the scattering of phonons. Specifically, ≈20% reduction in the already ultralow lattice thermal conductivity is realized for the Sn 0.99 Na 0.01 Se–STSe sample at 773 K compared to the thermal conductivity of pure SnSe. Consequently, a peak thermoelectric figure of merit ZT of 1.33 at 773 K with a high average ZT (ZT ave ) value of 0.91 (423–823 K) is achieved for the Sn 0.99 Na 0.01 Se–STSe sample.},
doi = {10.1002/aenm.201803072},
journal = {Advanced Energy Materials},
number = 2,
volume = 9,
place = {United States},
year = {Wed Nov 28 00:00:00 EST 2018},
month = {Wed Nov 28 00:00:00 EST 2018}
}
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