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Title: Enhanced Thermoelectric Properties of Cu2ZnSnSe4 with Ga-doping

Abstract

Gallium doped Cu2ZnSnSe4 quaternary chalcogenides with and without excess Cu were synthesized by elemental reaction and densified using hot pressing in order to investigate their high temperature thermoelectric properties. The resistivity, , and Seebeck coefficient, S, for these materials decrease with increased Ga-doping while both mobility and effective mass increase with Ga doping. The power factor (S2/ρ) therefore increases with Ga-doping. The highest thermoelectric figure of merit (ZT = 0.39 at 700 K) was obtained for the composition that had the lowest thermal conductivity. Our results suggest an approach to achieving optimized thermoelectric properties and are part of the continuing effort to explore different quaternary chalcogenide compositions and structure types, as this class of materials continues to be of interest for thermoelectrics applications.

Authors:
 [1];  [1];  [2];  [2];  [3];  [1]
  1. Univ. of South Florida, Tampa, FL (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Vehicle Technologies Office (VTO)
OSTI Identifier:
1265657
Alternate Identifier(s):
OSTI ID: 1250202
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Alloys and Compounds
Additional Journal Information:
Journal Volume: 650; Journal ID: ISSN 0925-8388
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; quaternary chalcogenides; thermoelectric properties; gallium doping

Citation Formats

Wei, Kaya, Beauchemin, Laura, Wang, Hsin, Porter, Wallace D., Martin, Joshua, and Nolas, George S. Enhanced Thermoelectric Properties of Cu2ZnSnSe4 with Ga-doping. United States: N. p., 2015. Web. doi:10.1016/j.jallcom.2015.08.046.
Wei, Kaya, Beauchemin, Laura, Wang, Hsin, Porter, Wallace D., Martin, Joshua, & Nolas, George S. Enhanced Thermoelectric Properties of Cu2ZnSnSe4 with Ga-doping. United States. https://doi.org/10.1016/j.jallcom.2015.08.046
Wei, Kaya, Beauchemin, Laura, Wang, Hsin, Porter, Wallace D., Martin, Joshua, and Nolas, George S. Mon . "Enhanced Thermoelectric Properties of Cu2ZnSnSe4 with Ga-doping". United States. https://doi.org/10.1016/j.jallcom.2015.08.046. https://www.osti.gov/servlets/purl/1265657.
@article{osti_1265657,
title = {Enhanced Thermoelectric Properties of Cu2ZnSnSe4 with Ga-doping},
author = {Wei, Kaya and Beauchemin, Laura and Wang, Hsin and Porter, Wallace D. and Martin, Joshua and Nolas, George S.},
abstractNote = {Gallium doped Cu2ZnSnSe4 quaternary chalcogenides with and without excess Cu were synthesized by elemental reaction and densified using hot pressing in order to investigate their high temperature thermoelectric properties. The resistivity, , and Seebeck coefficient, S, for these materials decrease with increased Ga-doping while both mobility and effective mass increase with Ga doping. The power factor (S2/ρ) therefore increases with Ga-doping. The highest thermoelectric figure of merit (ZT = 0.39 at 700 K) was obtained for the composition that had the lowest thermal conductivity. Our results suggest an approach to achieving optimized thermoelectric properties and are part of the continuing effort to explore different quaternary chalcogenide compositions and structure types, as this class of materials continues to be of interest for thermoelectrics applications.},
doi = {10.1016/j.jallcom.2015.08.046},
journal = {Journal of Alloys and Compounds},
number = ,
volume = 650,
place = {United States},
year = {Mon Aug 10 00:00:00 EDT 2015},
month = {Mon Aug 10 00:00:00 EDT 2015}
}

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Cited by: 32 works
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Works referencing / citing this record:

Quaternary chalcogenides: Promising thermoelectric material and recent progress
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Enhanced thermoelectric performance through grain boundary engineering in quaternary chalcogenide Cu 2 ZnSnSe 4
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