Impact of Low‐Frequency Vibrations on Charge Transport in High‐Mobility Organic Semiconductors (Phys. Status Solidi RRL 3/2019)

Despite decades of intensive research, understanding of the charge transport in high-mobility organic semiconductors is still a challenge. With a steady advancement in both the experimental and theoretical studies it becomes clear that the charge transport in high-mobility organic semiconductors is limited by thermally activated low-frequency vibrations. These vibrations perturb the local environment for a charge carrier and prevent its fast wave-like motion. In article no. 1800485, Andrey Sosorev et al. review the most important theoretical and experimental results on low-frequency vibrations in organic semiconductors and their impact on charge transport. Specifically, the review concentrates on the relationship between the molecular structure, crystal packing, low-frequency vibrations, and charge mobility. Revealing this relationship is of a paramount importance for the formulation of effective guidelines to minimize the detrimental impact of the low-frequency vibrations and to focus the search for highmobility organic semiconductors.