[22a-W631-1~12] 12.2 Characterization and Materials Physics

[22a-W631-9] Temperature dependence of effective mobility in energetically disordered molecular solids

〇Kazuhiko Seki¹, Mariusz Wojcik² (1.AIST NMRI, 2.Lodz Univ. of Tech.)

Keywords:effective mobility,organic semiconductor

Carrier transport in molecular solids can be described by hopping transitions between neighboring molecules and the mobility is considered to be strongly influenced by electrostatic energy distribution on ionized molecules. In amorphous molecular solids, the electrostatic energy at each molecule is different because the polarization originating from the surrounding molecules fluctuates if the molecular orientation and arrangement are distributed. A Gaussian distribution of the site energy is expected from the central limit theorem. We study effective mobility for the square lattice and cubic lattice, where hopping transitions of carriers are described by the Marcus equation under Gaussian density of states in the dilute limit.