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Issue 15, 2018
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Topotactic anion-exchange in thermoelectric nanostructured layered tin chalcogenides with reduced selenium content

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Abstract

Anion exchange has been performed with nanoplates of tin sulfide (SnS) via “soft chemical” organic-free solution syntheses to yield layered pseudo-ternary tin chalcogenides on a 10 g-scale. SnS undergoes a topotactic transformation to form a series of S-substituted tin selenide (SnSe) nano/micro-plates with tuneable chalcogenide composition. SnS0.1Se0.9 nanoplates were spark plasma sintered into phase-pure, textured, dense pellets, the ZT of which has been significantly enhanced to ≈1.16 from ≈0.74 at 923 K via microstructure texturing control. These approaches provide versatile, scalable and low-cost routes to p-type layered tin chalcogenides with controllable composition and competitive thermoelectric performance.

Graphical abstract: Topotactic anion-exchange in thermoelectric nanostructured layered tin chalcogenides with reduced selenium content

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Publication details

The article was received on 06 Dec 2017, accepted on 23 Mar 2018 and first published on 23 Mar 2018


Article type: Edge Article
DOI: 10.1039/C7SC05190E
Citation: Chem. Sci., 2018,9, 3828-3836
  • Open access: Creative Commons BY license
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    Topotactic anion-exchange in thermoelectric nanostructured layered tin chalcogenides with reduced selenium content

    G. Han, S. R. Popuri, H. F. Greer, R. Zhang, L. Ferre-Llin, J. G. Bos, W. Zhou, M. J. Reece, D. J. Paul, A. R. Knox and D. H. Gregory, Chem. Sci., 2018, 9, 3828
    DOI: 10.1039/C7SC05190E

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