Hartmut Yersin is Professor at the University in Regensburg, the city which also hosts the headquarter of OSRAM, one of the two leading illumination companies. Various research stays brought him in contact with leading workgroups in East and West. Now his research activities focus upon characterization of emitter materials, transition metal complexes, and theory and development of electroluminescent devices. His projects are awarded large fundings from the German Research Foundation, the Volkswagen Foundation as well as the Federal Ministry of Education and Research. His close relationship...