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Issue 11, 2019
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Crystallographically textured SnSe nanomaterials produced from the liquid phase sintering of nanocrystals

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Abstract

We report the thermoelectric performance of p-type nanocrystalline SnSe obtained from the liquid phase sintering of blends of SnSe nanocrystals and Te nanorods. A cycled hot press procedure at a temperature above the Te melting point promoted the formation of crystallographically textured SnSe nanomaterials with relative densities up to 93%. After consolidation, part of this Te was found within the SnSe lattice and part remained as elemental Te between the SnSe grains. The presence of Te during the SnSe consolidation resulted in SnSe nanomaterials with higher electrical conductivities and lower Seebeck coefficients and thermal conductivities. By adjusting the amount of Te, thermoelectric figures of merit (ZT) up to 1.4 at 790 K were measured in the direction of the uniaxial pressure, coinciding with the preferential a crystallographic axis. While this value matches the highest ZT value reported at this temperature for SnSe in the [100] crystal direction, the ZT values of the consolidated SnSe along the bc plane were relatively lower due to moderately low thermal conductivities in this plane.

Graphical abstract: Crystallographically textured SnSe nanomaterials produced from the liquid phase sintering of nanocrystals

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Publication details

The article was received on 06 Nov 2018, accepted on 06 Feb 2019 and first published on 06 Feb 2019


Article type: Paper
DOI: 10.1039/C8DT04414G
Citation: Dalton Trans., 2019,48, 3641-3647

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    Crystallographically textured SnSe nanomaterials produced from the liquid phase sintering of nanocrystals

    M. Li, Y. Liu, Y. Zhang, Y. Zuo, J. Li, K. H. Lim, D. Cadavid, K. M. Ng and A. Cabot, Dalton Trans., 2019, 48, 3641
    DOI: 10.1039/C8DT04414G

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