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Article Dans Une Revue Solid State Phenomena Année : 2011

Effect of Doping on the Thermoelectric Properties of Thallium Tellurides Using First Principles Calculations

Résumé

We present a study of the electronic properties of Tl5Te3, BiTl9Te6 and SbTl9Te6 compounds by means of density functional theory based calculations. The optimized lattice constants of the compounds are in good agreement with the experimental data. The band gap of BiTl9Te6 and SbTl9Te6 compounds are found to be equal to 0.589 eV and 0.538 eV, respectively and are in agreement with the available experimental data. To compare the thermoelectric properties of the different compounds we calculate their thermopower using Mott's law and show, as expected experimentally, that the substituted tellurides have much better thermoelectric properties compared to the pure compound.

Domaines

Matériaux

Dates et versions

hal-00610485 , version 1 (22-07-2011)

Identifiants

Citer

Philippe Jund, Tao Xiaoma, Romain Rv Viennois, Jean-Claude Tedenac. Effect of Doping on the Thermoelectric Properties of Thallium Tellurides Using First Principles Calculations. Solid State Phenomena, 2011, 172 - 174, pp.985-989. ⟨10.4028/www.scientific.net/SSP.172-174.985⟩. ⟨hal-00610485⟩
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