期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 57, 期 52, 页码 17063-17068出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201809847
关键词
modulation doping; nanomaterial; reactive ink; SnSe2; thermoelectricity
资金
- European Regional Development Funds
- China Scholarship Council
- Generalitat de Catalunya [2017 SGR 327]
- Spanish MINECO coordinated project VALPEC [ENE2017-85087-C3]
- Severo Ochoa Programme (MINECO) [SEV-2013-0295]
- CERCA Programme/Generalitat de Catalunya
- [GC 2017 SGR 128]
In the present work, we detail a fast and simple solution-based method to synthesize hexagonal SnSe2 nanoplates (NPLs) and their use to produce crystallographically textured SnSe2 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 SnSe2 bulk nanomaterials obtained from the hot pressing of these SnSe2 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, SnSe2 NPLs are blended here with metal nanoparticles. The electrical conductivities of the blends are significantly improved with respect to bare SnSe2 NPLs, what translates into a three-fold increase of the TE Figure of merit, reaching unprecedented ZT values up to 0.65.
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