The optoelectronic properties of electroluminescent dendrimers

Dendrimers can be used as the emissive layer in organic light-emitting diod es. We have synthesised conjugated dendrimers containing meta-linked stilbe ne dendrons and luminescent porphyrin or triarylamine cores. The HOMO energ y levels of the amine-cored dendrimers were studied by cyclic voltammetry a nd modelling of device characteristics. Both techniques showed that charge was injected directly into the core and importantly that the energy levels did not change with dendrimer generation.