Effect of the 2D phonon spectrum on the electric conductivity and thermopower of tetrathiotetracene iodide crystals
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SANDULEAC, Ionel. Effect of the 2D phonon spectrum on the electric conductivity and thermopower of tetrathiotetracene iodide crystals. In: Moldavian Journal of the Physical Sciences, 2014, nr. 3-4(13), pp. 138-143. ISSN 1810-648X.
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Moldavian Journal of the Physical Sciences
Numărul 3-4(13) / 2014 / ISSN 1810-648X /ISSNe 2537-6365

Effect of the 2D phonon spectrum on the electric conductivity and thermopower of tetrathiotetracene iodide crystals
CZU: 537.323+539+621.382

Pag. 138-143

Sanduleac Ionel
 
Technical University of Moldova
 
Disponibil în IBN: 12 octombrie 2015


Rezumat

Thermoelectric transport along the molecular chains of quasi-one-dimensional organic crystals of tetrathiotetracene iodide, TTT2I3, is studied in terms of a quasi-two dimensional (2D) model applying the linearized Boltzmann kinetic equation. Earlier, for simplicity, we have considered the lattice vibrations in a 1D approximation. In this paper, the full 2D spectrum for acoustic longitudinal phonons is taken into account and the effect of this consideration on the electric conductivity and thermopower (Seebeck coefficient) is studied. Numerical results and comparison with previous calculations are presented. It is shown that, if the 2D phonon spectrum is taken instead of the 1D one, the electric conductivity slightly increases and the thermopower decreases, although insignificantly