Macromolecular materials such as conductive polymers, bio-materials or nanoparticles play crucial parts in fields like organic electronics, photovoltaics and electronic biosensors. Charge transfer across interfaces involving macromolecular materials has a strong influence on device properties and performance. This presentation will give an overview of our activities to determine the orbital line-up at interfaces composed of macro-molecular materials. The electronic structure of self-assembled monolayer interfaces, semiconducting polymer interfaces as well as internal interfaces at organic/inorganic hybrid molecular materials will be discussed. The results suggest the occurrence of significant interface dipoles and large charge injection barriers at covalently bonded macro-molecular interfaces. Our measurement methodology is based on photoemission spectroscopy in combination with electrospray thin film deposition. Electrospray enables the fabrication of essentially uncontaminated macro-molecular thin films under high vacuum conditions directly from solution. This enables photoemission spectroscopy characterization without interference of emissions of contamination layers.

Electronic structure of macro-molecular materials interfaces

243rd National Meeting (2012)

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