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Title: Phase Stability, Crystal Structure, and Thermoelectric Properties of Cu12Sb4S13–xSex Solid Solutions

Journal Article · · Chemistry of Materials
 [1];  [2];  [2];  [2];  [3];  [3]
  1. Chongqing Univ. (China); Michigan State Univ., East Lansing, MI (United States)
  2. Michigan State Univ., East Lansing, MI (United States)
  3. Univ. of California, Los Angeles, CA (United States)

The solubility of selenium on the sulfur site in tetrahedrite Cu12Sb4S13 has been explored by theoretical calculations here, and the results have been verified by X-ray diffraction and X-ray synchrotron studies on Cu12Sb4S13–xSex with x ranging from zero to 3. Density-functional theory calculations predict that Se substitution on the tetrahedral 24g site is preferred, and this is found to be consistent with Rietveld refinement of the crystal structure. High temperature thermoelectric property measurements on Cu12Sb4S13-xSex reveal that Se substitution results in a decrease in electrical resistivity without diminution of the Seebeck coefficient. The “decoupling” of these parameters leads to a 30% enhancement in power factor of the x = 1 sample compared to that of pure Cu12Sb4S13. Furthermore, in spite of an increased electronic thermal conductivity, alloy scattering of phonons caused by Se substitution reduces both the lattice and total thermal conductivities, leading to a large increase in the thermoelectric figure of merit.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Revolutionary Materials for Solid State Energy Conversion (RMSSEC)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0001054; AC02-06CH11357; AC02-05CH11231
OSTI ID:
1370337
Journal Information:
Chemistry of Materials, Vol. 28, Issue 6; Related Information: RMSSEC partners with Michigan State University (lead); University of California, Los Angeles; University of Michigan; Northwestern University; Oak Ridge National Laboratory; Ohio State University; Wayne State University; ISSN 0897-4756
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 73 works
Citation information provided by
Web of Science

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Thermoelectric properties of Al substituted tetrahedrite journal January 2020
Recent developments in Earth-abundant copper-sulfide thermoelectric materials journal September 2019
Achieving high power factor and thermoelectric performance through dual substitution of Zn and Se in tetrahedrites Cu 12 Sb 4 S 13 journal October 2019
Thermoelectric Properties of Magnesium-Doped Tetrahedrite Cu12−xMgxSb4S13 journal February 2019
An Integrated Approach to Thermoelectrics: Combining Phonon Dynamics, Nanoengineering, Novel Materials Development, Module Fabrication, and Metrology journal July 2018
Copper chalcogenide thermoelectric materials journal August 2018
Oxidation Studies of Cu12Sb3.9Bi0.1S10Se3 Tetrahedrite journal February 2018
Powder metallurgically synthesized Cu 12 Sb 4 S 13 tetrahedrites: phase transition and high thermoelectricity journal January 2017
Research Update: Cu–S based synthetic minerals as efficient thermoelectric materials at medium temperatures journal October 2016
Sodium-Doped Tin Sulfide Single Crystal: A Nontoxic Earth-Abundant Material with High Thermoelectric Performance journal April 2018
Effect of Composition on Thermoelectric Properties of As-Cast Materials: The Cu12−xCoxSb4S13−ySey Case journal January 2019
Compressive sensing lattice dynamics. I. General formalism text January 2018