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Low-Dimensional Organic Crystal Tetrathiotetracene–Iodide as Thermoelectric Material: Reality and Prospects

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Abstract:

It is explained the strong dependence of electrical conductivity and very weak dependence of thermopower on crystal purity observed experimentally in ordinary quasi-one-dimensional organic crystals of tetrathiotetracene–iodide, TTT2I3. It is shown theoretically that in really existing crystals TTT2I3 it is possibly to increase the dimensionless thermoelectric figure of merit ZT up to 1.4 at room temperature, if the carriers concentration is diminished by approximately 2.5 times with respect to the concentration in stoichiometric crystals. For purer crystals with a slightly less impurity concentration values of ZT ∼ 2 are expected. Whole predicted increase of ZT is expected as a result of the thermoelectric power factor growth.
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  • Journal of Nanoelectronics and Optoelectronics (JNO) is an international and cross-disciplinary peer reviewed journal to consolidate emerging experimental and theoretical research activities in the areas of nanoscale electronic and optoelectronic materials and devices into a single and unique reference source. JNO aims to facilitate the dissemination of interdisciplinary research results in the inter-related and converging fields of nanoelectronics and optoelectronics.
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