NOVELTY - Use of oligomers of differently charged metal complexes having a metal-metal interaction, in optoelectronic devices, preferably light-absorbing components (OSCs) is claimed. The oligomer metal complexes comprise at least one positively charged metal complex (I) and at least one negatively charged metal complex (II).    USE - The oligomers are useful in optoelectronic devices and electronic components, such as organic diode, organic transistor or organic laser, preferably an organic solar cell or organic photovoltaic cell. The oligomers are useful in light-absorbing device (all claimed).    ADVANTAGE - The salts of the metal complex are chemically and photochemically very stable. The charged metal complex exhibits a metal-metal interaction, which leads to the improved mobility of the holes and electrons avoiding the use of additional components to improve the mobility and thus is cost effective to produce organic solar cells.    DETAILED DESCRIPTION - Use of oligomers of differently charged metal complexes having a metal-metal interaction, in optoelectronic devices, preferably light-absorbing components (OSCs) is claimed. The oligomer metal complexes comprise at least one positively charged metal complex of formula ((L1L2L3L4M1)(n+)) (K1) and at least one negatively charged metal complex of formula ((L5L6L7L8M2)(n-)) (K2).    M1, M2 = Ir(I), Rh(I), Pt(II), Pd(II) or Au(III);    L1-L4, L5-L8 = neutral or charged ligand, where two or more of L1-L4 and L5-L8 can be linked together; and    n = 1 or 2.    INDEPENDENT CLAIMS are also included for:    (1) the oligomer comprising (K1) and (K2), where the metal complex used for doping exhibits a further central atom as the oligomer matrix-forming metal complex or at least two different metal centers are present in the oligomer;    (2) a double complex salt, comprising (K1) and (K2), where at least one of the ligands for increasing the solubilization contains an organic group, preferably 1-200C alkyl, preferably 9-30C alkyl, at least one polysiloxane of formula (-OSiR2-)n1OSiR3, at least polyether of formula (-OCH2-)mOR or (-OCH2CH2)mOR;    (3) producing an optoelectronic component, preferably OSCs, comprising either introducing (K1) and (K2) in the form of a dispersion or introducing the components (K1) in the form of a solution and components (K2) by diffusion; and    (4) a light-absorbing device, comprising an anode, a cathode and an absorption layer containing at least one double-complex salt-oligomer, where the absorption layer is arranged between and in direct or indirect contact with the anode and the cathode.    x = 0.00001-0.99999;    M1 = Pd(II);    M2 = Pt(II);    n1 = 1-200, preferably 5-30;    m = 1-200, preferably 2-30; and    R = 1-6C alkyl.