Two-dimensional layered architecture constructing energy and phonon blocks for enhancing thermoelectric performance of InSb
InSb is a narrow-bandgap semiconductor with a zinc blende structure and has been wildly applied in photodetectors, infrared thermal imaging, and Hall devices. The facts of decent band structure, ultrahigh electron mobility, and nontoxic nature indicate that InSb may be a potential mid-temperature th...
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sg-ntu-dr.10356-1568422022-05-05T02:05:29Z Two-dimensional layered architecture constructing energy and phonon blocks for enhancing thermoelectric performance of InSb Xin, Jiwu Li, Wang Li, Sihui Tao, Yang Xu, Tian Luo, Yubo Jiang, Qinghui Wei, Lei Yang, Junyou School of Electrical and Electronic Engineering Engineering::Electrical and electronic engineering Fibers Thermoelectric InSb is a narrow-bandgap semiconductor with a zinc blende structure and has been wildly applied in photodetectors, infrared thermal imaging, and Hall devices. The facts of decent band structure, ultrahigh electron mobility, and nontoxic nature indicate that InSb may be a potential mid-temperature thermoelectric material. The critical challenges of InSb, such as high thermal conductivity and small Seebeck coefficient, have induced its ultrahigh lattice thermal conductivity, and thus low ZT values. In view of this, we have developed a competitive strategy typified by the cost-efficient nanocompositing of z wt% QSe2 (Q = Sn, W). Specifically, the QIn+ and SeSb+ point defects were introduced in the InSb system by nanocompositing the vested two-dimensional layered QSe2. In addition, the enlarged valence band maximum of intrinsic WSe2 acted as ladders can scatter a fair number of hole carriers, resulting in the relatively enhanced Seebeck coefficient of high temperature. Moreover, the disorderly distributed nanosheets/particles, and dislocations acting as obstacles can effectively delay the heat flow diffusion, inducing the strong scattering of thermal phonons. Consequently, an enhanced power factor of ∼33.3 µW cm−1 K−2 and ZT value of ∼0.82 at 733 K have been achieved in the 3% WSe2 sample, companied with the engineering output power density ωmax ∼233 µW cm−2 and thermoelectric conversion efficiency η ∼5.2%. This artificially designed approach indicated by suited nanocompositing can integrate several engineering strategies such as point defects, nanoengineering, and energy filtering into one, providing a reference to optimize the thermoelectric performance of other thermoelectric systems. [Figure not available: see fulltext.] Agency for Science, Technology and Research (A*STAR) Ministry of Education (MOE) National Research Foundation (NRF) Submitted/Accepted version This work was supported by the National Natural Science Foundation of China (92163211 and 51872102), Foshan (Southern China) Institute for New Materials (2021AYF25005), Singapore Ministry of Education Academic Research Fund Tier 2 (MOE2019-T2-2-127 and MOET2EP50120-0002), the A*STAR under AME IRG (A2083c0062), Singapore Ministry of Education Academic Research Fund Tier 1 (RG90/19 and RG73/ 19), and Singapore National Research Foundation Competitive Research Program (NRF-CRP18-2017-02). 2022-05-05T02:05:29Z 2022-05-05T02:05:29Z 2022 Journal Article Xin, J., Li, W., Li, S., Tao, Y., Xu, T., Luo, Y., Jiang, Q., Wei, L. & Yang, J. (2022). Two-dimensional layered architecture constructing energy and phonon blocks for enhancing thermoelectric performance of InSb. Science China Materials, 65(5), 1353-1361. https://dx.doi.org/10.1007/s40843-021-1921-3 2199-4501 https://hdl.handle.net/10356/156842 10.1007/s40843-021-1921-3 2-s2.0-85124124370 5 65 1353 1361 en MOE2019-T2-2-127 MOET2EP50120-0002 A2083c0062 RG90/19 RG73/ 19 NRF-CRP18-2017-02 Science China Materials 10.21979/N9/KF5MAZ © 2022 Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature. All rights reserved. This paper was published in Science China Materials and is made available with permission of Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature. application/pdf |
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Engineering::Electrical and electronic engineering Fibers Thermoelectric Xin, Jiwu Li, Wang Li, Sihui Tao, Yang Xu, Tian Luo, Yubo Jiang, Qinghui Wei, Lei Yang, Junyou Two-dimensional layered architecture constructing energy and phonon blocks for enhancing thermoelectric performance of InSb |
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InSb is a narrow-bandgap semiconductor with a zinc blende structure and has been wildly applied in photodetectors, infrared thermal imaging, and Hall devices. The facts of decent band structure, ultrahigh electron mobility, and nontoxic nature indicate that InSb may be a potential mid-temperature thermoelectric material. The critical challenges of InSb, such as high thermal conductivity and small Seebeck coefficient, have induced its ultrahigh lattice thermal conductivity, and thus low ZT values. In view of this, we have developed a competitive strategy typified by the cost-efficient nanocompositing of z wt% QSe2 (Q = Sn, W). Specifically, the QIn+ and SeSb+ point defects were introduced in the InSb system by nanocompositing the vested two-dimensional layered QSe2. In addition, the enlarged valence band maximum of intrinsic WSe2 acted as ladders can scatter a fair number of hole carriers, resulting in the relatively enhanced Seebeck coefficient of high temperature. Moreover, the disorderly distributed nanosheets/particles, and dislocations acting as obstacles can effectively delay the heat flow diffusion, inducing the strong scattering of thermal phonons. Consequently, an enhanced power factor of ∼33.3 µW cm−1 K−2 and ZT value of ∼0.82 at 733 K have been achieved in the 3% WSe2 sample, companied with the engineering output power density ωmax ∼233 µW cm−2 and thermoelectric conversion efficiency η ∼5.2%. This artificially designed approach indicated by suited nanocompositing can integrate several engineering strategies such as point defects, nanoengineering, and energy filtering into one, providing a reference to optimize the thermoelectric performance of other thermoelectric systems. [Figure not available: see fulltext.] |
author2 |
School of Electrical and Electronic Engineering |
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School of Electrical and Electronic Engineering Xin, Jiwu Li, Wang Li, Sihui Tao, Yang Xu, Tian Luo, Yubo Jiang, Qinghui Wei, Lei Yang, Junyou |
format |
Article |
author |
Xin, Jiwu Li, Wang Li, Sihui Tao, Yang Xu, Tian Luo, Yubo Jiang, Qinghui Wei, Lei Yang, Junyou |
author_sort |
Xin, Jiwu |
title |
Two-dimensional layered architecture constructing energy and phonon blocks for enhancing thermoelectric performance of InSb |
title_short |
Two-dimensional layered architecture constructing energy and phonon blocks for enhancing thermoelectric performance of InSb |
title_full |
Two-dimensional layered architecture constructing energy and phonon blocks for enhancing thermoelectric performance of InSb |
title_fullStr |
Two-dimensional layered architecture constructing energy and phonon blocks for enhancing thermoelectric performance of InSb |
title_full_unstemmed |
Two-dimensional layered architecture constructing energy and phonon blocks for enhancing thermoelectric performance of InSb |
title_sort |
two-dimensional layered architecture constructing energy and phonon blocks for enhancing thermoelectric performance of insb |
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2022 |
url |
https://hdl.handle.net/10356/156842 |
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1734310211580067840 |