Synthesis, characterisation and thermoelectric properties of the oxytelluride Bi2O2Te

Luu, S. D.N. and Vaqueiro, P. ORCID: https://orcid.org/0000-0001-7545-6262 (2015) Synthesis, characterisation and thermoelectric properties of the oxytelluride Bi2O2Te. Journal of Solid State Chemistry, 226. pp. 219-223. ISSN 0022-4596 doi: 10.1016/j.jssc.2015.02.026

Abstract/Summary

Bi2O2Te was synthesised from a stoichiometric mixture of Bi, Bi2O3 and Te by a solid state reaction. Analysis of powder X-ray diffraction data indicates that this material crystallises in the anti-ThCr2Si2 structure type (space group I4/mmm), with lattice parameters a = 3.98025(4) and c = 12.70391(16) Å. The electrical and thermal transport properties of Bi2O2Te were investigated as a function of temperature over the temperature range 300 ≤ T/K ≤ 665. These measurements indicate that Bi2O2Te is an n-type semiconductor, with a band gap of 0.23 eV. The thermal conductivity of Bi2O2Te is remarkably low for a crystalline material, with a value of only 0.91 W m-1 K-1 at room temperature.

Item Type	Article
URI	https://reading-clone.eprints-hosting.org/id/eprint/39759
Identification Number/DOI	10.1016/j.jssc.2015.02.026
Refereed	Yes
Divisions	Life Sciences > School of Chemistry, Food and Pharmacy > Department of Chemistry Interdisciplinary centres and themes > Energy Research Interdisciplinary centres and themes > Chemical Analysis Facility (CAF) > Xray (CAF) Interdisciplinary centres and themes > Chemical Analysis Facility (CAF) > Electron Microscopy Laboratory (CAF)
Publisher	Elsevier
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