An effect of crystallographic distortion on carrier mobility in poly(3-hexylthiophene) thin films

The aggregation states and physical properties of polymers in thin films deviate from those found the bulk. Although an effect thickness on carrier mobility for poly(3-hexylthiophene) (P3HT) has been widely studied, there is a lack discussion terms crystallographic distortion. Here, we demonstrate how out-of-plane hole P3HT, which typical semiconducting polymer, changes with decreasing film thickness. Time-of-flight measurements analysis using Gaussian disorder model revealed that zero-field decreased because increase energetical spatial distribution hopping sites. Grazing incidence wide-angle x-ray diffraction such distributions charge carriers were induced by distortion P3HT films.