Disordered Organic Solids: Polaronic Transport

This lecture explores incoherent transport in disordered organic solids, where static disorder results in energetic heterogeneity and dynamic disorder causes fluctuations in the transfer integral. It delves into polaronic transport in polycrystalline and amorphous solids, discussing the criteria for disorder-controlled transport and the charge transfer between molecules. The lecture also covers charge transport by thermally activated hopping, the Holstein model for transfer rate, and the temperature dependence of charge transport. Additionally, it examines the Gaussian Disorder Model, microscopic view of disorder-controlled transport, and the superposition of static and dynamic disorder. The lecture concludes with discussions on multiple trap and release model, variable range hopping, and a unified view of temperature dependence in organic semiconductors.