Synthesis, Crystal Structure, and High Temperature Transport Properties of p-type Cu2Zn1-xFexSnSe4

Journal Article · Tue Jan 01 00:00:00 EST 2013 · Inorganic Chemistry

DOI:https://doi.org/10.1021/ic402455x· OSTI ID:1120455

Dong, Yongkwan ^[1]; Wang, Hsin ^[2]; Nolas, George S. ^[3]

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

Iron substituted Cu2Zn1-xFexSnSe4 stannites were synthesized by reaction of the constituent elements and subsequent solid state annealing, followed by densification by hot-pressing. The compositions for each specimen were confirmed with a combination of Rietveld refinement and elemental analysis. Refinement results indicated that only the 2a site was occupied by Zn and Fe. Their high temperature transport properties were measured from 300 to 800 K. The electrical resistivity and thermal conductivity decrease with increasing Fe content. For the lower Fe content specimens with x = 0.2 and 0.4, the electrical properties are strongly temperature dependent, unlike that of the higher Fe content specimens (x = 0.6 and 0.8). A maximum ZT value of 0.46 was obtained at 800 K for Cu2Zn0.4Fe0.6SnSe4.

• 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: 1120455
• Journal Information: Inorganic Chemistry, Vol. 52, Issue 24; ISSN 0020--1669
• Country of Publication: United States
• Language: English

Related Subjects

semiconductors
selenide
stannite
p-type
thermoelectrics