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

Journal Article · · Small
 [1];  [2];  [2];  [3];  [2];  [2];  [2];  [3];  [2];  [4]
  1. Nanyang Technological Univ. (Singapore); Northwestern Univ., Evanston, IL (United States); Northwestern University
  2. Nanyang Technological Univ. (Singapore)
  3. A*STAR (Agency for Science, Technology and Research) Innovis (Singapore)
  4. Northwestern Univ., Evanston, IL (United States)
+ Show Author Affiliations

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.

Research Organization:
Northwestern Univ., Evanston, IL (United States)
Sponsoring Organization:
MRSEC; National Natural Science Foundation of China; Singapore A*STAR Pharos Program SERC; Singapore MOE AcRF Tier 1; Soft and Hybrid Nanotechnology Experimental (SHyNE) Resource; USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-05CH11231; AC02-06CH11357; SC0014520
OSTI ID:
1775336
Journal Information:
Small, Journal Name: Small Journal Issue: 50 Vol. 14; ISSN 1613-6810
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
CuSbSe2
carrier concentration
nanoplate
texture
thermoelectric