Temperature dependences of the thermoelectric power factor of TTT2I3 organic crystals

Abstract

In this paper, the temperature dependence of the thermoelectric power factor of nanostructured organic crystals of tetrathiotetracene-iodide, TTT2I3 is presented. It has been demonstrated that such organic compounds are very good candidates for thermoelectric applications, and could be used for different purposes, such as direct conversion of thermal energy into electrical power, cooling systems or infrared sensors. The crystals admit non-stoichiometric compounds, and the thermoelectric properties are well tunable by manipulating the donor-acceptor ratio. In this paper, we have modeled the electrical conductivity, the thermopower and the power factor as a function of absolute temperature for different values of charge carrier concentration.