Research of the Organic Device Group
The range of applications of organic materials has expanded in recent decades from purely passive to functional applications. In particular, organic pi-conjugated hydrocarbons provide solid state semiconducting properties, and thus open a wide range of potential electronic and optoelectronic devices. In this respect, organic transistors, organic photovoltaic cells and organic light-emitting diodes as technologically relevant components can be mentioned. The future will tell if other components such as sensors or memories find their way into the application. Compared to their inorganic counterparts, the benefits of the organic components are not only in manufacturing methodology holding out the prospect of a low-cost mass production, but also in the desired shape and mechanical flexibility of electronics. By this motivated, a technological progress has been achieved in recent years that has already led to the first commercial products. Despite, many fundamental physical processes occurring are not well understood in these components. This is due to the complex properties of organic semiconductors which hardly can be described by common semiconductor models. The complexity of the organic solid in turn leads to a complex behavior of organic based devices which is reinforced by the fact that other required materials such as contact materials, additional semiconductors, insulators and dopants are in use whose material properties and interactions are mostly unknown. On top, already now, a tremendous variety of organic compounds suited for functional organic devices are known and available and the sheer quantity of these compounds requires special affords in the material and device characterization.