Synthesis and thermoelectric properties of Cu excess Cu2ZnSnSe4

Journal Article · Wed Jan 01 00:00:00 EST 2014 · Physica Status Solidi rrl

DOI:https://doi.org/10.1002/pssr.201308274· OSTI ID:1156791

Dong, Yongkwan ^[1]; Wang, Hsin ^[2]; Nolas, G ^[3]

---

1. University of South Florida, Tampa (USF)
2. ORNL
3. University of South Florida, Tampa

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.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Energy Efficiency and Renewable Energy (EERE)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1156791
• Journal Information: Physica Status Solidi rrl, Vol. 8, Issue 1; ISSN 1862-6254
• Country of Publication: United States
• Language: English

Related Subjects

thermoelectric