In:
Angewandte Chemie, Wiley, Vol. 130, No. 52 ( 2018-12-21), p. 17309-17314
Abstract:
In the present work, we detail a fast and simple solution‐based method to synthesize hexagonal SnSe 2 nanoplates (NPLs) and their use to produce crystallographically textured SnSe 2 nanomaterials. We also demonstrate that the same strategy can be used to produce orthorhombic SnSe nanostructures and nanomaterials. NPLs are grown through a screw dislocation‐driven mechanism. This mechanism typically results in pyramidal structures, but we demonstrate here that the growth from multiple dislocations results in flower‐like structures. Crystallographically textured SnSe 2 bulk nanomaterials obtained from the hot pressing of these SnSe 2 structures display highly anisotropic charge and heat transport properties and thermoelectric (TE) figures of merit limited by relatively low electrical conductivities. To improve this parameter, SnSe 2 NPLs are blended here with metal nanoparticles. The electrical conductivities of the blends are significantly improved with respect to bare SnSe 2 NPLs, what translates into a three‐fold increase of the TE Figure of merit, reaching unprecedented ZT values up to 0.65.
Type of Medium:
Online Resource
ISSN:
0044-8249
,
1521-3757
DOI:
10.1002/ange.v130.52
DOI:
10.1002/ange.201809847
Language:
English
Publisher:
Wiley
Publication Date:
2018
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