Enhanced thermoelectricity by controlled local structure in bismuth-chalcogenides

Abstract

Spectroscopic techniques, including photoelectron spectroscopy, diffuse reflectance, and x-ray absorption, are used to investigate the electronic structure and the local structure of LaOBiS${}_{2-x}$Se${}_x$ thermoelectric material. It is found that Se substitution effectively suppresses local distortion, that can be responsible for the increased carrier mobility together with a change in the electronic structure. The results suggest a possible way to control thermoelectric properties by tuning of the local crystal structure of these materials.

arXiv comment6 pages, 4 figures, 1 table, J. Appl. Phys. (in press)

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Cited by in corpus (1)

• Semilocal exchange-correlation potentials for solid-state calculations: Current status and future directions