N-Heteropolyzyklen als Funktionsmaterialien

The aim of this research consortium is the development of novel organic functional materials with specifically tunable electronic properties and their application as photoactive components and organic semiconductors. The concept is based on the N « CH isosteric relationship (as well as NH « [CH]^– isosterism) in combination with the number and ring size of condensed heteropolycycles in order to specifically tailor their electronic and optical properties while leaving their molecular shapes unchanged.

Prerequisite for a rational approach to these new materials is a detailed insight into the underlying elementary processes, including those of molecular aggregation (and its control through weak intermolecular interactions), the structure formation at interfaces, electronic excitation as well as charge transport. The research plan comprises the whole spectrum ranging from synthetic method delevopment, structural and spectroscopic characterization and theoretical modeling of molecules, small aggregates and solid films. Of particular interest is the way in which molecular properties are related to the optoelectronic materials and device properties.

A new focus will be the investigation of N-heterocyclic radicals and diradicals which show interesting charge transport and non-linear optical properties. During the course of the next funding period, there will be a focus on new aspects of photophysics, in particular on molecular polaritonics and thus, the investigation and application of the effects of resonant microcavities on molecules.