Relating microstructure to transport in organic semiconductor transistors

As organic semiconductors approach commercialization, there is a need to better understand the relationship between charge transport and microstructure, in particular to identify the inherent bottlenecks to charge transport. The highest field-effect mobility is found in semicrystalline polymers and in solubilized small molecules that crystallize readily. No consistent correlation however is found between grain size and mobility. This observation suggests the importance of the role of intergrain charge transport in semicrystalline and polycrystalline organic thin films.