Preparation and thermoelectric properties of sintered iodine-containing clathrate compounds Ge38Sb8I8 and Sn38Sb8I8

被引：23

作者：

Kishimoto, Kengo

Arimura, Shuntaro

Koyanagi, Tsuyoshi

机构：

[1] Yamaguchi Univ, Dept Elect & Elect Engn, Fac Engn, Ube, Yamaguchi 7558611, Japan

[2] Yamaguchi Univ, Div Symbiot Environm Syst Engn, Grad Sch Sci & Engn, Ube, Yamaguchi 7558611, Japan

来源：

APPLIED PHYSICS LETTERS | 2006年 / 88卷 / 22期

关键词：

D O I：

10.1063/1.2209207

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The iodine-containing cationic type-I clathrates Ge38Sb8I8 and Sn38Sb8I8 were prepared and their thermodynamic properties as well as their thermoelectric properties were investigated. Their atomic displacement parameters were as large as those of anionic clathrates such as Ba8Ga16Ge30 and Cs8Cd4Sn42. The room temperature thermal conductivities of Ge38Sb8I8 and Sn38Sb8I8 were 7 and 12 mW cm(-1) K-1, respectively; these values were as low as that of the above anionic clathrates. Both cationic clathrates had negative Seebeck coefficients; the band gap energies of Ge38Sb8I8 and Sn38Sb8I8 were 1.16 and 0.80 eV, respectively. (c) 2006 American Institute of Physics.

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