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Energies 2015, 8(7), 6275-6285; doi:10.3390/en8076275

Investigation of the Anisotropic Thermoelectric Properties of Oriented Polycrystalline SnSe

1,2,3
,
1,2,* , 1,2
,
1,2
and
1,2
1
State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
2
CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
3
University of Chinese Academy of Sciences, Beijing 100049, China
*
Author to whom correspondence should be addressed.
Academic Editor: Shi Xue Dou
Received: 31 March 2015 / Revised: 8 June 2015 / Accepted: 12 June 2015 / Published: 25 June 2015
(This article belongs to the Special Issue Thermoelectric Energy Harvesting)
View Full-Text   |   Download PDF [1775 KB, uploaded 25 June 2015]   |  

Abstract

Polycrystalline SnSe was synthesized by a melting-annealing-sintering process. X-ray diffraction reveals the sample possesses pure phase and strong orientation along [h00] direction. The degree of the orientations was estimated and the anisotropic thermoelectric properties are characterized. The polycrystalline sample shows a low electrical conductivity and a positive and large Seebeck coefficient. The low thermal conductivity is also observed in polycrystalline sample, but slightly higher than that of single crystal. The minimum value of thermal conductivity was measured as 0.3 W/m·K at 790 K. With the increase of the orientation factor, both electrical and thermal conductivities decrease, but the thermopowers are unchanged. As a consequence, the zT values remain unchanged in the polycrystalline samples despite the large variation in the degree of orientation. View Full-Text
Keywords: thermoelectric; polycrystals; SnSe; anisotropy thermoelectric; polycrystals; SnSe; anisotropy
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Li, Y.; Shi, X.; Ren, D.; Chen, J.; Chen, L. Investigation of the Anisotropic Thermoelectric Properties of Oriented Polycrystalline SnSe. Energies 2015, 8, 6275-6285.

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