High-temperature thermoelectric properties of the β-As<sub>2−x</sub>Bi<sub>x</sub>Te<sub>3</sub> solid solution - Archive ouverte HAL
Article Dans Une Revue APL Materials Année : 2016

High-temperature thermoelectric properties of the β-As2−xBixTe3 solid solution

Résumé

Bi2Te3-based compounds are a well-known class of outstanding thermoelectric materials. β-As2Te3, another member of this family, exhibits promising thermoelectric properties around 400 K when appropriately doped. Herein, we investigate the high-temperature thermoelectric properties of the β-As2−xBixTe3 solid solution. Powder X-ray diffraction and scanning electron microscopy experiments showed that a solid solution only exists up to x = 0.035. We found that substituting Bi for As has a beneficial influence on the thermopower, which, combined with extremely low thermal conductivity values, results in a maximum ZT value of 0.7 at 423 K for x = 0.017 perpendicular to the pressing direction.
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Dates et versions

hal-01337465 , version 1 (01-07-2020)

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Jean-Baptiste Vaney, Gaëlle Delaizir, Andrea Piarristeguy, Judith Monnier, Eric Alleno, et al.. High-temperature thermoelectric properties of the β-As2−xBixTe3 solid solution. APL Materials, 2016, 4 (10), pp.104901. ⟨10.1063/1.4950947⟩. ⟨hal-01337465⟩
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