Self‐Assembly: Self‐Assembly and Microstructural Control of a Hexa‐peri‐hexabenzocoronene–Perylene Diimide Dyad by Solvent Vapor Diffusion (Small 20/2011)

Control over the microstructure of solution-processed organic semiconductors on surfaces is crucial for charge carrier transport throughout the thin layer and for device performance. The image shows an AFM image of a large-scale, well-ordered, uniform surface microstructure of a liquid crystalline hexa-peri-hexabenzocoronene-perylene diimide dyad obtained via solvent vapor diffusion, a versatile and powerful processing method employed for the first time. With its large variety of processing parameters, SVD opens up the opportunity to finely balance solvent evaporation rate, dewetting effects, and various interactions, enabling the achievement of the desired molecular organization in thin-film layers. The topography image was acquired for a cyclohexane solution drop cast on HMDS in THF vapor atmosphere