Thermoelectric properties of tetrathiotetracene iodide crystals: modeling and experiment

Casian, Anatoloe I.; Sanduleac, Ionel I.

Abstract

A more complete physical model for nanostructured crystals of tetrathiotetracene-iodide that takes into account the interaction of carriers with the neighboring one-dimensional (1D) conductive chains and also the scattering on impurities and defects is presented. For simplicity, the 2D approximation is applied. It is shown that this model describes very well the temperature dependencies of electrical conductivity in the temperature interval between 180 and 300 K, and of the Seebeck coefficient between 50 and 300 K, the highest temperature for which the measurements were reported. For lower temperatures, it is necessary to also consider the fluctuations of dielectric phase that appear before the metal–dielectric transition. It is found that the predictions made in the 1D approximation are valid only if the crystal purity is not very high, and the electrical conductivity is limited up to ∼3.5×106Ω−1m−1 and the thermoelectric figure of merit up to ZT∼4.

Citation

Casian, A. I., & Sanduleac, I. I. (2014). Thermoelectric properties of tetrathiotetracene iodide crystals: modeling and experiment. Journal of Electronic Materials, https://doi.org/10.1007/s11664-014-3105-6

• Journal Article Type: Article
• Publication Date: Mar 1, 2014
• Deposit Date: Aug 5, 2014
• Publicly Available Date: Aug 5, 2014
• Journal: Journal of Electronic Materials
• Print ISSN: 0361-5235
• Electronic ISSN: 1543-186X
• Publisher: Springer Verlag
• Peer Reviewed: Not Peer Reviewed
• DOI: https://doi.org/10.1007/s11664-014-3105-6
• Public URL: https://nottingham-repository.worktribe.com/output/996506
• Publisher URL: http://link.springer.com/article/10.1007%2Fs11664-014-3105-6
• Additional Information: A paper produced for the H2ESOT project, a collaborative FP7 funded project led by Professor Simon Woodward from University of Nottingham and supported under the EU ENERGY Theme for Future Emerging Technologies.; ; The final publication is available at Springer via http://dx.doi.org/10.1007/s11664-014-3105-6