High figure-of-merit and power generation in high-entropy GeTe-based thermoelectrics
The high-entropy concept provides extended, optimized space of a composition, resulting in unusual transport phenomena and excellent thermoelectric performance. By tuning electron and phonon localization, we enhanced the figure-of-merit value to 2.7 at 750 kelvin in germanium telluride-based high-entropy materials and realized a high experimental conversion efficiency of 13.3% at a temperature difference of 506 kelvin with the fabricated segmented module. By increasing the entropy, the increased crystal symmetry delocalized the distribution of electrons in the distorted rhombohedral structure, resulting in band convergence and improved electrical properties. By contrast, the localized phonons from the entropy-induced disorder dampened the propagation of transverse phonons, which was the origin of the increased anharmonicity and largely depressed lattice thermal conductivity. We provide a paradigm for tuning electron and phonon localization by entropy manipulation, but we have also demonstrated a route for improving the performance of high-entropy thermoelectric materials.
NI Journal Papers
First ; Corresponding
Guangdong Province Program ; Guangdong-Hong Kong-Macao Joint Laboratory[2019B121205001] ; National Natural Science Foundation of China[
|WOS Research Area|
Science & Technology - Other Topics
|WOS Accession No|
|ESI Research Field|
BIOLOGY & BIOCHEMISTRY;CLINICAL MEDICINE;MULTIDISCIPLINARY;PLANT & ANIMAL SCIENCE;ENVIRONMENT/ECOLOGY;SOCIAL SCIENCES, GENERAL;MICROBIOLOGY;ECONOMICS BUSINESS;IMMUNOLOGY;MATERIALS SCIENCE;MATHEMATICS;COMPUTER SCIENCE;SPACE SCIENCE;MOLECULAR BIOLOGY & GENETICS;CHEMISTRY;PSYCHIATRY/PSYCHOLOGY;NEUROSCIENCE & BEHAVIOR;PHYSICS;GEOSCIENCES;ENGINEERING
Web of Science
Cited Times [WOS]:74
|Document Type||Journal Article|
|Department||Department of Physics|
1.Shenzhen Key Laboratory of Thermoelectric Materials,Department of Physics,Southern University of Science and Technology,Shenzhen,518055,China
2.School of Materials and Energy,University of Electronic Science and Technology of China,Chengdu,610054,China
3.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|
Jiang，Binbin,Wang，Wu,Liu，Shixuan,et al. High figure-of-merit and power generation in high-entropy GeTe-based thermoelectrics[J]. Science,2022,377(6602):208-213.
Jiang，Binbin.,Wang，Wu.,Liu，Shixuan.,Wang，Yan.,Wang，Chaofan.,...&He，Jiaqing.(2022).High figure-of-merit and power generation in high-entropy GeTe-based thermoelectrics.Science,377(6602),208-213.
Jiang，Binbin,et al."High figure-of-merit and power generation in high-entropy GeTe-based thermoelectrics".Science 377.6602(2022):208-213.
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