Title | Tunable quantum gaps to decouple carrier and phonon transport leading to high-performance thermoelectrics |
Author | |
Corresponding Author | Xie,Lin; He,Jiaqing |
Publication Years | 2022-12-01
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DOI | |
Source Title | |
EISSN | 2041-1723
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Volume | 13Issue:1 |
Abstract | Thermoelectrics enable direct heat-to-electricity transformation, but their performance has so far been restricted by the closely coupled carrier and phonon transport. Here, we demonstrate that the quantum gaps, a class of planar defects characterized by nano-sized potential wells, can decouple carrier and phonon transport by selectively scattering phonons while allowing carriers to pass effectively. We choose the van der Waals gap in GeTe-based materials as a representative example of the quantum gap to illustrate the decoupling mechanism. The nano-sized potential well of the quantum gap in GeTe-based materials is directly visualized by in situ electron holography. Moreover, a more diffused distribution of quantum gaps results in further reduction of lattice thermal conductivity, which leads to a peak ZT of 2.6 at 673 K and an average ZT of 1.6 (323–723 K) in a GeTe system. The quantum gap can also be engineered into other thermoelectrics, which provides a general method for boosting their thermoelectric performance. |
URL | [Source Record] |
Indexed By | |
Language | English
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Important Publications | NI Journal Papers
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SUSTech Authorship | First
; Corresponding
|
Funding Project | leading talents of the Guangdong Province Program[00201517]
; Guangdong-Hong Kong-Macao Joint Laboratory[2019B121205001]
; Science and Technology Innovation Committee Foundation of Shenzhen["KQTD2016022619565991","JCYJ20190809145205497"]
; National Natural Science Foundation of China["51632005","11874194","11934007","12174176"]
; high level of special funds[G02206302]
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WOS Research Area | Science & Technology - Other Topics
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WOS Subject | Multidisciplinary Sciences
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WOS Accession No | WOS:000858076500012
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Publisher | |
Scopus EID | 2-s2.0-85138459446
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Data Source | Scopus
|
Citation statistics |
Cited Times [WOS]:5
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Document Type | Journal Article |
Identifier | http://kc.sustech.edu.cn/handle/2SGJ60CL/402639 |
Department | Department of Physics |
Affiliation | 1.Shenzhen Key Laboratory of Thermoelectric Materials,Department of Physics,Southern University of Science and Technology,Shenzhen,518055,China 2.Department of Materials Science and Engineering,National University of Singapore,Singapore,117575,Singapore 3.School of Materials Science and Engineering,Shaanxi Normal University; Key Laboratory for Macromolecular Science of Shaanxi Province,Xi’an,710062,China 4.Guangdong-Hong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and Devices,Southern University of Science and Technology,Shenzhen,518055,China |
First Author Affilication | Department of Physics |
Corresponding Author Affilication | Department of Physics; Southern University of Science and Technology |
First Author's First Affilication | Department of Physics |
Recommended Citation GB/T 7714 |
Yu,Yong,Xu,Xiao,Wang,Yan,et al. Tunable quantum gaps to decouple carrier and phonon transport leading to high-performance thermoelectrics[J]. Nature Communications,2022,13(1).
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APA |
Yu,Yong.,Xu,Xiao.,Wang,Yan.,Jia,Baohai.,Huang,Shan.,...&He,Jiaqing.(2022).Tunable quantum gaps to decouple carrier and phonon transport leading to high-performance thermoelectrics.Nature Communications,13(1).
|
MLA |
Yu,Yong,et al."Tunable quantum gaps to decouple carrier and phonon transport leading to high-performance thermoelectrics".Nature Communications 13.1(2022).
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