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Investigation of the Anisotropic Thermoelectric Properties of Oriented Polycrystalline SnSe

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  • Yulong Li

    (State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
    CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
    University of Chinese Academy of Sciences, Beijing 100049, China)

  • Xun Shi

    (State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
    CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China)

  • Dudi Ren

    (State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
    CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China)

  • Jikun Chen

    (State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
    CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China)

  • Lidong Chen

    (State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
    CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China)

Abstract

Polycrystalline SnSe was synthesized by a melting-annealing-sintering process. X-ray diffraction reveals the sample possesses pure phase and strong orientation along [ h 00] 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.

Suggested Citation

  • Yulong Li & Xun Shi & Dudi Ren & Jikun Chen & Lidong Chen, 2015. "Investigation of the Anisotropic Thermoelectric Properties of Oriented Polycrystalline SnSe," Energies, MDPI, vol. 8(7), pages 1-11, June.
  • Handle: RePEc:gam:jeners:v:8:y:2015:i:7:p:6275-6285:d:51638
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    References listed on IDEAS

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    1. Kanishka Biswas & Jiaqing He & Ivan D. Blum & Chun-I Wu & Timothy P. Hogan & David N. Seidman & Vinayak P. Dravid & Mercouri G. Kanatzidis, 2012. "High-performance bulk thermoelectrics with all-scale hierarchical architectures," Nature, Nature, vol. 489(7416), pages 414-418, September.
    2. Li-Dong Zhao & Shih-Han Lo & Yongsheng Zhang & Hui Sun & Gangjian Tan & Ctirad Uher & C. Wolverton & Vinayak P. Dravid & Mercouri G. Kanatzidis, 2014. "Ultralow thermal conductivity and high thermoelectric figure of merit in SnSe crystals," Nature, Nature, vol. 508(7496), pages 373-377, April.
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    1. Tingzhen Ming & Qiankun Wang & Keyuan Peng & Zhe Cai & Wei Yang & Yongjia Wu & Tingrui Gong, 2015. "The Influence of Non-Uniform High Heat Flux on Thermal Stress of Thermoelectric Power Generator," Energies, MDPI, vol. 8(11), pages 1-19, November.

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