题名 | All-scale hierarchical thermoelectrics: MgTe in PbTe facilitates valence band convergence and suppresses bipolar thermal transport for high performance |
作者 | |
通讯作者 | Zhao, L. D. |
发表日期 | 2013-11
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DOI | |
发表期刊 | |
ISSN | 1754-5692
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EISSN | 1754-5706
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卷号 | 6期号:11页码:3346-3355 |
摘要 | We report a high ZT of similar to 2.0 at 823 K for 2% Na-doped PbTe with 6% MgTe with excellent thermal stability. We attribute the high thermoelectric performance to a synergistic combination of enhanced power factor, reduction of the lattice thermal conductivity and simultaneous suppression of bipolar thermal conductivity. MgTe inclusion in PbTe owns triple functions: the Mg alloying within the solubility limit in PbTe modifies the valence band structure by pushing the two valence bands (L and Sigma bands) closer in energy, thereby facilitating charge carrier injection. When the solubility limit of Mg is exceeded, ubiquitous endotaxial nanostructures form, which when coupled with mesoscale microstructuring results in a very low (lattice) thermal conductivity through all-scaled length phonon scattering. Meanwhile, most significantly, the Mg alloying enlarges the energy gap of conduction band (C band) and light valence band (L band), thereby suppresses the bipolar thermal conductivity through an increase in band gap. |
相关链接 | [来源记录] |
收录类别 | |
语种 | 英语
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重要成果 | ESI高被引
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学校署名 | 其他
|
资助项目 | Office of Basic Energy Sciences[DE-SC0001054]
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WOS研究方向 | Chemistry
; Energy & Fuels
; Engineering
; Environmental Sciences & Ecology
|
WOS类目 | Chemistry, Multidisciplinary
; Energy & Fuels
; Engineering, Chemical
; Environmental Sciences
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WOS记录号 | WOS:000325946400026
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出版者 | |
EI入藏号 | 20134416908977
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EI主题词 | Alloying
; Energy Gap
; Iv-vi Semiconductors
; Lead Alloys
; Magnesium Alloys
; Sodium Compounds
; Solubility
; Thermoelectricity
; Valence Bands
|
EI分类号 | Metallurgy:531.1
; Magnesium And Alloys:542.2
; Lead And Alloys:546.1
; Thermodynamics:641.1
; Electricity: Basic Concepts And Phenomena:701.1
; Physical Chemistry:801.4
|
来源库 | Web of Science
|
引用统计 |
被引频次[WOS]:626
|
成果类型 | 期刊论文 |
条目标识符 | http://kc.sustech.edu.cn/handle/2SGJ60CL/30299 |
专题 | 理学院_物理系 |
作者单位 | 1.Northwestern Univ, Dept Chem, Evanston, IL 60208 USA 2.South Univ Sci & Technol China, Dept Phys, Shenzhen 518055, Peoples R China 3.Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA 4.Michigan State Univ, Dept Elect & Comp Engn, E Lansing, MI 48824 USA 5.Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA |
推荐引用方式 GB/T 7714 |
Zhao, L. D.,Wu, H. J.,Hao, S. Q.,et al. All-scale hierarchical thermoelectrics: MgTe in PbTe facilitates valence band convergence and suppresses bipolar thermal transport for high performance[J]. Energy & Environmental Science,2013,6(11):3346-3355.
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APA |
Zhao, L. D..,Wu, H. J..,Hao, S. Q..,Wu, C. I..,Zhou, X. Y..,...&Kanatzidis, M. G..(2013).All-scale hierarchical thermoelectrics: MgTe in PbTe facilitates valence band convergence and suppresses bipolar thermal transport for high performance.Energy & Environmental Science,6(11),3346-3355.
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MLA |
Zhao, L. D.,et al."All-scale hierarchical thermoelectrics: MgTe in PbTe facilitates valence band convergence and suppresses bipolar thermal transport for high performance".Energy & Environmental Science 6.11(2013):3346-3355.
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条目包含的文件 | ||||||
文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | 操作 | |
Zhao-2013-All-scale (1353KB) | -- | -- | 限制开放 | -- |
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