Abstract
In this Article, we elucidate the structural and thermoelectric properties of stannite-kuramite solid solutions, Cu2+xFe1-xSnS 4-y (x = 0-1), with sulfur defects (y) ≤ 0.4. Structural analysis revealed that anisotropy decreases and Cu/Sn disorder increases with an increase in x. The samples with x = 0.8-1 exhibit degenerate conduction, whereas the Seebeck coefficient (S) remains relatively high, S ≈ 100 μV K-1 for x = 0.8 at 300 K. Thermal conductivities (κ) of the solid solutions are in the range 10-3-10-2 W cm-1 K -1, which is close to the κ value of silicon dioxide. The dimensionless figure of merit (ZT) reaches 0.044 for x = 0.8 at 300 K. The ZT is enhanced significantly by an increase in temperature and is doubly larger than that of x = 0 at 300 K. These findings allow us to attain higher ZT values through optimization of chemical composition.
| Original language | English |
|---|---|
| Pages (from-to) | 9861-9866 |
| Number of pages | 6 |
| Journal | Inorganic Chemistry |
| Volume | 52 |
| Issue number | 17 |
| DOIs | |
| Publication status | Published - 2013 Sep 2 |
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ASJC Scopus subject areas
- Inorganic Chemistry
- Physical and Theoretical Chemistry
Cite this
Enhanced thermoelectric figure of merit in stannite-kuramite solid solutions Cu2+xFe1-xSnS4-y (x = 0-1) with anisotropy lowering. / Goto, Yosuke; Naito, Fumihiko; Sato, Rina; Yoshiyasu, Keigo; Itoh, Takanori; Kamihara, Yoichi; Matoba, Masanori.
In: Inorganic Chemistry, Vol. 52, No. 17, 02.09.2013, p. 9861-9866.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Enhanced thermoelectric figure of merit in stannite-kuramite solid solutions Cu2+xFe1-xSnS4-y (x = 0-1) with anisotropy lowering
AU - Goto, Yosuke
AU - Naito, Fumihiko
AU - Sato, Rina
AU - Yoshiyasu, Keigo
AU - Itoh, Takanori
AU - Kamihara, Yoichi
AU - Matoba, Masanori
PY - 2013/9/2
Y1 - 2013/9/2
N2 - In this Article, we elucidate the structural and thermoelectric properties of stannite-kuramite solid solutions, Cu2+xFe1-xSnS 4-y (x = 0-1), with sulfur defects (y) ≤ 0.4. Structural analysis revealed that anisotropy decreases and Cu/Sn disorder increases with an increase in x. The samples with x = 0.8-1 exhibit degenerate conduction, whereas the Seebeck coefficient (S) remains relatively high, S ≈ 100 μV K-1 for x = 0.8 at 300 K. Thermal conductivities (κ) of the solid solutions are in the range 10-3-10-2 W cm-1 K -1, which is close to the κ value of silicon dioxide. The dimensionless figure of merit (ZT) reaches 0.044 for x = 0.8 at 300 K. The ZT is enhanced significantly by an increase in temperature and is doubly larger than that of x = 0 at 300 K. These findings allow us to attain higher ZT values through optimization of chemical composition.
AB - In this Article, we elucidate the structural and thermoelectric properties of stannite-kuramite solid solutions, Cu2+xFe1-xSnS 4-y (x = 0-1), with sulfur defects (y) ≤ 0.4. Structural analysis revealed that anisotropy decreases and Cu/Sn disorder increases with an increase in x. The samples with x = 0.8-1 exhibit degenerate conduction, whereas the Seebeck coefficient (S) remains relatively high, S ≈ 100 μV K-1 for x = 0.8 at 300 K. Thermal conductivities (κ) of the solid solutions are in the range 10-3-10-2 W cm-1 K -1, which is close to the κ value of silicon dioxide. The dimensionless figure of merit (ZT) reaches 0.044 for x = 0.8 at 300 K. The ZT is enhanced significantly by an increase in temperature and is doubly larger than that of x = 0 at 300 K. These findings allow us to attain higher ZT values through optimization of chemical composition.
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U2 - 10.1021/ic401310c
DO - 10.1021/ic401310c
M3 - Article
VL - 52
SP - 9861
EP - 9866
JO - Inorganic Chemistry
JF - Inorganic Chemistry
SN - 0020-1669
IS - 17
ER -