Microstructural iterative reconstruction toward excellent thermoelectric performance in MnTe
|Corresponding Author||Xu，Xiao; He，Jiaqing|
Earth-abundant manganese telluride (MnTe) with a hexagonal structure has shown significant thermoelectric conversion potential; however, the drawbacks of low carrier concentration and low mobility have limited its application. Herein, we constructed a type of layer structure by fabricating polycrystalline MnSbTe, increasing the hole density by 100 times. The introduced van der Waals gaps effectively enhanced the phonon scattering, further suppressing the intrinsic low thermal conductivity. The reduced hole concentration in the Ge-doped MnSbTe-based specimens, verified by both theoretical calculations and experimental characterization studies, was unexpectedly found to enhance mobility by reducing the intervalley scattering of carriers, resulting in a record high average ZT value of 0.71 from 300 K to 823 K and an excellent peak ZT value of 1.3 at 823 K. Hence, an MnGeSbTe-based single stage generating module was successfully assembled with a competitive performance of 0.81 W (0.45 W cm) and 4.6% over a temperature gradient of 480 K. This tailored investigation created an outstanding MnTe-based specimen, which could serve as a candidate for application in thermoelectric generators.
First ; Corresponding
National Natural Science Foundation of China["11934007","11874194"] ; Science and Technology Innovation Committee Foundation of Shenzhen["JCYJ20200109141205978","ZDSYS20141118160434515"] ; Special Funds for the Cultivation of Guangdong College Students' Scientific and Technological Innovation[pdjh2022c0091]
|WOS Research Area|
Chemistry ; Energy & Fuels ; Engineering ; Environmental Sciences & Ecology
Chemistry, Multidisciplinary ; Energy & Fuels ; Engineering, Chemical ; Environmental Sciences
|WOS Accession No|
Cited Times [WOS]:0
|Document Type||Journal Article|
|Department||Department of Physics|
1.Department of Physics,Southern University of Science and Technology,Shenzhen,518055,China
2.Institute for Metallic Materials,Leibniz Institute for Solid State and Materials Research,Dresden,01069,Germany
3.Laboratory of Computational Physics,Institute of Applied Physics and Computational Mathematics,Beijing,100088,China
4.Shenzhen Institute for Advanced Study,University of Electronic Science and Technology of China,Shenzhen,518110,China
|First Author Affilication||Department of Physics|
|Corresponding Author Affilication||Department of Physics|
|First Author's First Affilication||Department of Physics|
Luo，Yiyuan,Wang，Jinghan,Yang，Jianmin,et al. Microstructural iterative reconstruction toward excellent thermoelectric performance in MnTe[J]. Energy and Environmental Science,2023,16(9).
Luo，Yiyuan.,Wang，Jinghan.,Yang，Jianmin.,Mao，Dasha.,Cui，Juan.,...&He，Jiaqing.(2023).Microstructural iterative reconstruction toward excellent thermoelectric performance in MnTe.Energy and Environmental Science,16(9).
Luo，Yiyuan,et al."Microstructural iterative reconstruction toward excellent thermoelectric performance in MnTe".Energy and Environmental Science 16.9(2023).
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