Internal interfaces and phase boundaries play an important role in electronic devices. This holds especially for organic electronics due to the large number of organic and inorganic layers in such devices. Very often complicated layer structures with a wide variety of different materials are used to optimize device performances. The electronic and morphologic properties of these materials have to be matched up precisely demanding a detailed understanding of the underlying mechanisms at interfaces.
Furthermore, numerous types of mixed layers are applied in different functions in organic electronic devices, e.g. doped transport- and emission-layers in organic light emitting diodes and bulk-hetero-junctions in organic photovoltaic. In these mixed systems, a fundamental understanding of the interactions that affect the morphology and electronic properties is of great importance.