Production of organic phosphorescent layers with addition of heavy main group metal complexes

A process for producing organic electronic layers including organic emitters that are phosphorescent at room temperature, the process comprising:

• providing organic fluorescent emitters comprising organic molecules having either a partial or overall aromatic character with delocalized π electrons,
• providing metal complexes containing organic complex ligands and at least one heavy main group metal selected from the group consisting of In, Tl, Sn, Pb, Sb and Bi, and
• codepositing, in a single layer on a substrate, (a) the organic fluorescent emitters together with (b) the metal complexes containing organic complex ligands and the at least one heavy main group metal,
• wherein combining the metal complexes containing the organic complex ligands and the at least one heavy main group metal with the organic fluorescent emitters via the codepositing step causes an alteration of the coordination sphere of the heavy main group metal including at least one of (a) an increase in a number of pairs of coordinated ligands and emitters or (b) a replacement of one or more of the organic complex ligands of the metal complexes by the organic fluorescent emitters.