Enhancement of Thermoelectric Performance in CuSbSe2 Nanoplate-Based Pellets by Texture Engineering and Carrier Concentration Optimization

Yubo Luo, Chengfeng Du, Qinghua Liang, Yun Zheng, Beibei Zhu, Huanlong Hu, Khiam Aik Khor, Jianwei Xu, Qingyu Yan, Mercouri G. Kanatzidis

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4 Citations (Scopus)

Abstract

This work reports the thermoelectric properties of the CuSbSe2-x mol% PtTe2 (x = 0, 0.5, 1.0, 1.5, and 2.0) pellets composed of highly oriented single crystalline nanoplates. CuSbSe2-PtTe2 single crystalline nanoplates are prepared by a wet-chemical process, and the pellets are prepared through a bottom-up self-assembly of the CuSbSe2-PtTe2 nanoplates and spark plasma sintering (SPS) process. X-ray diffraction and field emission scanning electron microscopic analyses show a highly textured nature with an orientation factor of ≈0.8 for (00l) facets along the primary surface of the pellets (in-plane, perpendicular to the SPS pressure). By this way, bulk-single-crystal-like electrical and thermal transport properties with a strong anisotropy are obtained, which results in an effective optimization on thermoelectric performance. The maximum in-plane thermoelectric figure-of-merit ZT value reaches 0.50 at 673 K for CuSbSe2-2.0 mol% PtTe2 pellet, which is about five times higher than the in-plane ZT (0.10) for pure CuSbSe2.

Original languageEnglish
Article number1803092
JournalSmall
Volume14
Issue number50
DOIs
Publication statusPublished - Dec 13 2018

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Keywords

  • CuSbSe
  • carrier concentration
  • nanoplate
  • texture
  • thermoelectric

ASJC Scopus subject areas

  • Biotechnology
  • Biomaterials
  • Chemistry(all)
  • Materials Science(all)

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