Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/156842
Title: Two-dimensional layered architecture constructing energy and phonon blocks for enhancing thermoelectric performance of InSb
Authors: Xin, Jiwu
Li, Wang
Li, Sihui
Tao, Yang
Xu, Tian
Luo, Yubo
Jiang, Qinghui
Wei, Lei
Yang, Junyou
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2022
Source: 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
Project: MOE2019-T2-2-127
MOET2EP50120-0002
A2083c0062
RG90/19
RG73/ 19
NRF-CRP18-2017-02
Journal: Science China Materials
Abstract: 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.]
URI: https://hdl.handle.net/10356/156842
ISSN: 2199-4501
DOI: 10.1007/s40843-021-1921-3
DOI (Related Dataset): 10.21979/N9/KF5MAZ
Rights: © 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.
Fulltext Permission: embargo_20230131
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles

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