Journal
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
Volume 8, Issue 1, Pages 61-64Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/pssr.201308274
Keywords
stannites; thermoelectrics; semiconductors; Cu2ZnSnSe4
Funding
- National Science Foundation [1048796]
- Department of Energy [1048796]
- UT-Battelle LLC [DE-AC05000OR22725]
- Directorate For Engineering
- Div Of Chem, Bioeng, Env, & Transp Sys [1048796] Funding Source: National Science Foundation
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Quaternary stannites with an excess of copper were successfully synthesized by reacting the constituent elements and subsequent solid state annealing, followed by densification by hot-pressing. The composition for each specimen was confirmed with a combination of Rietveld refinement and elemental analysis. Their high temperature thermoelectric properties were measured from 300 K to 800 K and compared with that of Cu2ZnSnSe4. The thermal conductivity decreases significantly with increasing Cu content at elevated temperatures due to the crystal structure of this material system. A maximum ZT value of 0.86 was obtained at 800 K for the specimen with the highest Cu content, Cu2.2Zn0.8SnSe4. ((c) 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
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