Copper(I) complexes, in particular for optoelectronic components

A copper(I) complex of formula A

• wherein:
• X*=at least one of Cl, Br, I, CN and SCN
• N*∩E=a bidentate ligand, wherein
• E=phosphanyl/arsenyl group of the R2E form, wherein R=one of alkyl, aryl, alkoxyl, phenoxyl, and amide;
• N*=an imine function, which is part of a N-heteroaromatic 5-membered ring, which is selected from the group consisting of oxazole, imidazole, thiazole, isoxazole, isothiazole, pyrazole, 1,2,3-triazole, 1,2,3-oxadiazole, 1,2,5-oxadiazole, 1,2,3-thiadiazole and 1,2,5-thiadiazole, or an imine function, which is part of a N-heteroaromatic 6-membered ring, which is chosen from the group consisting of pyridine, pyrimidine, triazine, pyrazine and pyridazine;
• and
• ∩=at least one carbon atom, which is part of the aromatic group, wherein the at least one carbon atom is directly adjacent to both the imine nitrogen atom and to the phosphorous or arsenic atom.