The embodiments of the invention relate to copper(I) complexes of the formula A where X* is Cl, Br, I, CN, SCN, alkinyl and/or N3 (independently of one another), N*∩E is a bidentate ligand with E being a phosphanyl/arsenyl group of the form R2E (in which R=alkyl, aryl, alkoxyl, phenoxyl, or amide), N* is an imine-function, which is a component of an N-heteroaromatic 5-membered ring that is selected from the group consisting of pyrazole, isoxazole, isothiazole, triazole, oxadiazole, thiadiazole, tetrazole, oxatriazole or thiatriazole, and “∩” is at least one carbon atom, which is likewise a component of the aromatic group, the carbon atom being located directly adjacent both to the imine nitrogen atom as well as to the phosphorus or arsenic atom. The copper(I) complexes may be used in optoelectronic components, particularly in organic light emitting diodes (OLEDs).