Diazepin-metal complex comprises a carbene ligand-benzimidazole and its use in the oled

The present invention relates to a metal center selected from iridium and platinum atoms and two azabenzimidazole carbene ligands - carbene complexes, the organic light emitting diode comprising such complexes comprising at least one such metal - carbene complexes the light emitting layer is selected from the lighting device comprising such an OLED, the fixed video display device and a mobile device of a video display device, and such a metal - carbene complex in an OLED, for example, as an emitter, a base material, a charge transport material and / or use of charge or exciton blocker.