Morphology and Texture Engineering Enhancing Thermoelectric Performance of Solvothermal Synthesized Ultra-large SnS Microcrystal

Liu, Wei-Di and Shi, Xiao-Lei ORCID: https://orcid.org/0000-0003-0905-2547 and Lin, Zi-Jie and Sun, Qiang and Han, Guang and Chen, Zhi-Gang ORCID: https://orcid.org/0000-0002-9309-7993 and Zou, Jin (2020) Morphology and Texture Engineering Enhancing Thermoelectric Performance of Solvothermal Synthesized Ultra-large SnS Microcrystal. ACS Applied Energy Materials, 3 (3). pp. 2192-2199.


Abstract

With intrinsically strong anisotropy, layer-structured SnS and SnSe-based thermoelectric materials are attracting extensive attention. In this study, we synthesized ultralarge SnS microcrystal through a facile solvothermal method. It is found that the morphology of as-synthesized SnS powders can be tuned from plate into belt shapes with reduction in the amount of NaOH. After sintering, the pellets sintered from larger SnS belts showed strengthened anisotropy due to texturing effect compared with those sintered from SnS plates, and led to enhanced electrical performance along the in-plane direction ({111}-preferred). The tuned reaction condition with reduction in the amount of NaOH also increased the Sn vacancies, leading to reduced band gap, shifted Fermi level, and subsequently enhanced hole concentration. Consequently, the overall thermoelectric performance was enhanced with reducing the amount of NaOH. This study indicates texture engineering is effective in tuning anisotropy of polycrystalline SnS, enhancing the thermoelectric performance, and can be realized via morphology engineering.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: © 2020 American Chemical Society
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Date Deposited: 23 Jun 2020 04:28
Last Modified: 01 Feb 2021 02:12
Uncontrolled Keywords: SnS; solvothermal; thermoelectric; anisotropy; morphology
Fields of Research (2008): 09 Engineering > 0912 Materials Engineering > 091205 Functional Materials
Identification Number or DOI: https://doi.org/10.1021/acsaem.0c00068
URI: http://eprints.usq.edu.au/id/eprint/38104

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