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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)
  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

Abstract This work reports the thermoelectric properties of the CuSbSe 2 ‐ x mol% PtTe 2 ( x = 0, 0.5, 1.0, 1.5, and 2.0) pellets composed of highly oriented single crystalline nanoplates. CuSbSe 2 ‐PtTe 2 single crystalline nanoplates are prepared by a wet‐chemical process, and the pellets are prepared through a bottom‐up self‐assembly of the CuSbSe 2 ‐PtTe 2 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 CuSbSe 2 ‐2.0 mol% PtTe 2 pellet, which is about five times higher than the in‐plane ZT (0.10) for pure CuSbSe 2 .

Research Organization:
Northwestern Univ., Evanston, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); Soft and Hybrid Nanotechnology Experimental (SHyNE) Resource; MRSEC; National Natural Science Foundation of China (NSFC); Singapore MOE AcRF Tier 1; Singapore A*STAR Pharos Program SERC
Grant/Contract Number:
SC0014520; NSF ECCS-1542205; NSF DMR-1720139; DMR-1720139; AC02-06CH11357; AC02-05CH11231; 61728401; 2016-T1-002-065; 1527200021; 1527200022; DE‐AC02‐06CH11357; DE‐AC02‐05CH11231
OSTI ID:
1775336
Alternate ID(s):
OSTI ID: 1485710
Journal Information:
Small, Vol. 14, Issue 50; ISSN 1613-6810
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 18 works
Citation information provided by
Web of Science

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Promising and Eco‐Friendly Cu 2 X‐Based Thermoelectric Materials: Progress and Applications journal January 2020

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Related Subjects

36 MATERIALS SCIENCE
carrier concentration
CuSbSe2
nanoplate
texture
thermoelectric