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

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Han_2018_CS_reducedselenium_CC.pdf (3.215Mb)
Date
21/04/2018
Author
Han, Guang
Popuri, Srinivas
Greer, Heather F.
Zhang, Ruizhi
Ferre-Llin, Lourdes
Bos, Jan-Willem G.
Zhou, Wuzong
Reece, Michael J.
Paul, Douglas J.
Knox, Andrew R.
Gregory, Duncan H.
Funder
EPSRC
Grant ID
ep/l017008/1
Keywords
QD Chemistry
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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.
Citation
Han , G , Popuri , S , Greer , H F , Zhang , R , Ferre-Llin , L , Bos , J-W G , Zhou , W , Reece , M J , Paul , D J , Knox , A R & Gregory , D H 2018 , ' Topotactic anion-exchange in thermoelectric nanostructured layered tin chalcogenides with reduced selenium content ' , Chemical Science , vol. 9 , no. 15 , pp. 3828-3836 . https://doi.org/10.1039/C7SC05190E
Publication
Chemical Science
Status
Peer reviewed
DOI
https://doi.org/10.1039/C7SC05190E
ISSN
2041-6520
Type
Journal item
Rights
© 2018, the Author(s). Open Access Article. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.
Description
This work was financially supported by the EPSRC (EP/K022156/1 and EP/P510968/1). SRP and JWGB acknowledge the EPSRC for support (EP/N01717X/1). HFG and WZ acknowledge the EPSRC for the Equipment Grant to purchase a Titan Themis 200 microscope (EP/L017008/1). MJR and RZ would like to acknowledge the EPSRC for support under the DEFCOM grant (EP/N022726/1). RZ acknowledges the support from a Marie Curie International Incoming Fellowship within the 7th European Community Framework Programme (Contract No. PIIF-GA-2013-624474).
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  • University of St Andrews Research
URI
http://hdl.handle.net/10023/13079

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