Leslie H. Jimison, Scott Himmelberger, Duc T. Duong, Jonathan Rivnay, Michael F. Toney and Alberto Salleo Vertical confinement and interface effects on the microstructure and charge transport of P3HT thin films Journal of Polymer Science Part B: Polymer Physics 51
Overall crystalline order in organic semiconductors has been suggested to play a significant role in charge transport. Using X-ray diffraction-based pole figures, a quantitative structural analysis of P3HT thin films of varying thicknesses is presented, paying particular attention to crystallinity and interface microstructure. The interface is found to be ∼25% as crystalline as the bulk of the material. Furthermore, the presence of a self-assembled monolayer enhances the density of interface-nucleated crystallites by a factor of ∼20. Charge transport is found to directly correlate with interface crystallinity.
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