TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preparation (Claimed): The preparation of (I), comprises performing substitution of at least one ligand (E1-ring-D1) with at least one functional group to improve the charge carrier transport including electron conductor and hole conductor.D1 = not defined.    TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: The optoelectronic component comprises a substrate, an anode, a cathode and at least one light emitting layer containing (I) and a host material, whose triplet (T1)-and-singlet (S1) energy levels are energetically higher than the triplet (T1)- and singlet(S1)-energy levels of (I), at least one hole-injecting layer, at least one electron-injecting layer, at least one hole-transporting layer and at least one electron-transporting layer. The anode and the cathode are applied to the substrate, and the light emitting layer is applied between the anode and cathode. The hole-injecting layer is applied between the anode and the hole-transporting layer. The electron-injecting layer is applied between the cathode and the electron-transporting layer. The light emitting layer is applied between the hole and the electron-transporting layer. Preferred Method: (I) is applied on a carrier by wet-chemical method using colloidal suspension or sublimation. The optoelectronic component is produced by coating at least one layer by sublimation process, or coating at least one layer with a OVPD (organic vapor phase deposition) method or with carrier gas sublimation or producing at least one layer from solution or with desired printing process. Preferred Definitions:    G1, G2 = pyridine, pyridazine, pyrimidine, pyrazine, triazine, oxazole, thiazole, imidazole, pyrazole, isoxazole, isothiazole, 1,2,3-triazole, 1,2,4-triazole, 1,2,4-oxadiazole, 1,2,4-thiadiazole, tetrazole, 1,2,3,4-oxatriazole or 1,2,3,4-thiatriazole.    SPECIFIC COMPOUNDS - 3 Compounds (I) are disclosed, which are bis(2-(2-diphenylphosphino)ethyl-pyridine)copper(I) chloride of formula (Ia), bis(2-(2-diphenylphosphino)ethyl-pyridine)copper(I) bromide and bis(2-(2-diphenylphosphino)ethyl-pyridine)copper(I) iodide.    EXAMPLE - No suitable example given.