中文版 | English
Title

Tunable quantum gaps to decouple carrier and phonon transport leading to high-performance thermoelectrics

Author
Corresponding AuthorXie,Lin; He,Jiaqing
Publication Years
2022-12-01
DOI
Source Title
EISSN
2041-1723
Volume13Issue: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
Important Publications
NI Journal Papers
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]
WOS Research Area
Science & Technology - Other Topics
WOS Subject
Multidisciplinary Sciences
WOS Accession No
WOS:000858076500012
Publisher
Scopus EID
2-s2.0-85138459446
Data Source
Scopus
Citation statistics
Cited Times [WOS]:5
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/402639
DepartmentDepartment 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 AffilicationDepartment of Physics
Corresponding Author AffilicationDepartment of Physics;  Southern University of Science and Technology
First Author's First AffilicationDepartment 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).
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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