Influence of structural defects on electrical conductivity of TTT2I3 crystals

Abstract

Effect of carriers’ scattering on lattice structural defects is investigated for organic quasione-dimensional crystals of tetrathiotetracene-iodide, TTT2I3. It is considered that the charge carriers are moving only along the tetrathiotetracene, TTT, chains which are independent each of other. The defects are modeled by rectangular potential barriers, displaced into TTT chains. The linear kinetic equation is deduced and solved, taking into account that the scattering processes are elastic. The expression for relaxation time is obtained and analyzed. The electrical conductivity is calculated numerically as a function of Fermi energy for different parameters of structural defects.