High thermoelectric performance realized through manipulating layered phonon-electron decoupling

Su L, Wang D, Wang S, Qin B, Wang Y, Qin Y, Jin Y, Chang C, Zhao LD. 2022. High thermoelectric performance realized through manipulating layered phonon-electron decoupling. Science. 375(6587), 1385–1389.

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Journal Article | Published | English

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Author
Su, Lizhong; Wang, Dongyang; Wang, Sining; Qin, Bingchao; Wang, Yuping; Qin, Yongxin; Jin, Yang; Chang, ChengISTA ; Zhao, Li Dong
Department
Abstract
Thermoelectric materials allow for direct conversion between heat and electricity, offering the potential for power generation. The average dimensionless figure of merit ZTave determines device efficiency. N-type tin selenide crystals exhibit outstanding three-dimensional charge and two-dimensional phonon transport along the out-of-plane direction, contributing to a high maximum figure of merit Zmax of ~3.6 × 10−3 per kelvin but a moderate ZTave of ~1.1. We found an attractive high Zmax of ~4.1 × 10−3 per kelvin at 748 kelvin and a ZTave of ~1.7 at 300 to 773 kelvin in chlorine-doped and lead-alloyed tin selenide crystals by phonon-electron decoupling. The chlorine-induced low deformation potential improved the carrier mobility. The lead-induced mass and strain fluctuations reduced the lattice thermal conductivity. Phonon-electron decoupling plays a critical role to achieve high-performance thermoelectrics.
Publishing Year
Date Published
2022-03-25
Journal Title
Science
Publisher
American Association for the Advancement of Science
Acknowledgement
This work was supported by the Basic Science Center Project of the National Natural Science Foundation of China (51788104), the National Key Research and Development Program of China (2018YFA0702100), the National Science Fund for Distinguished Young Scholars (51925101), the 111 Project (B17002), the Lise Meitner Project (M2889-N), and the National Key Research and Development Program of China (2018YFB0703600). This work is also supported by the National Postdoctoral Program for Innovative Talents (BX20200028). L.-D.Z. is thankful for the high-performance computing resources at Beihang University.
Volume
375
Issue
6587
Page
1385-1389
eISSN
IST-REx-ID

Cite this

Su L, Wang D, Wang S, et al. High thermoelectric performance realized through manipulating layered phonon-electron decoupling. Science. 2022;375(6587):1385-1389. doi:10.1126/science.abn8997
Su, L., Wang, D., Wang, S., Qin, B., Wang, Y., Qin, Y., … Zhao, L. D. (2022). High thermoelectric performance realized through manipulating layered phonon-electron decoupling. Science. American Association for the Advancement of Science. https://doi.org/10.1126/science.abn8997
Su, Lizhong, Dongyang Wang, Sining Wang, Bingchao Qin, Yuping Wang, Yongxin Qin, Yang Jin, Cheng Chang, and Li Dong Zhao. “High Thermoelectric Performance Realized through Manipulating Layered Phonon-Electron Decoupling.” Science. American Association for the Advancement of Science, 2022. https://doi.org/10.1126/science.abn8997.
L. Su et al., “High thermoelectric performance realized through manipulating layered phonon-electron decoupling,” Science, vol. 375, no. 6587. American Association for the Advancement of Science, pp. 1385–1389, 2022.
Su L, Wang D, Wang S, Qin B, Wang Y, Qin Y, Jin Y, Chang C, Zhao LD. 2022. High thermoelectric performance realized through manipulating layered phonon-electron decoupling. Science. 375(6587), 1385–1389.
Su, Lizhong, et al. “High Thermoelectric Performance Realized through Manipulating Layered Phonon-Electron Decoupling.” Science, vol. 375, no. 6587, American Association for the Advancement of Science, 2022, pp. 1385–89, doi:10.1126/science.abn8997.

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