Preparation and thermoelectric properties of sintered iodine-containing clathrate compounds Ge38Sb8I8 and Sn38Sb8I8
Preparation and thermoelectric properties of sintered iodine-containing clathrate compounds Ge38Sb8I8 and Sn38Sb8I8
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DOI：
10.1063/1.2209207
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发表时间：
2006-06
影响因子：
4
通讯作者：
K. Kishimoto;Shuntaro Arimura;T. Koyanagi
中科院分区：
文献类型：
--
作者：
K. Kishimoto;Shuntaro Arimura;T. Koyanagi
合成了含碘阳离子笼合物Ge38Sb8I8和Sn38Sb8I8，研究了它们的热力学性质和热电性能。它们的原子位移参数与Ba8Ga16Ge30和Cs8Cd4Sn42等阴离子笼合物的原子位移参数一样大。Ge38Sb8I8和Sn38Sb8I8的室温导热系数分别为7和12mWcm−1K−1，与上述阴离子笼合物相当。两种阳离子笼合物的Seebeck系数均为负，Ge38Sb8I8和Sn38Sb8I8的禁带宽度分别为1.16和0.80 eV。
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 12mWcm−1K−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 0.80eV, respectively.