NOVELTY - Cross-linking an organic metal complex into a multi-dimensional network, comprises carrying out a first reaction, which includes a first reactant in the form of an organic metal complex and a second reactant for forming a multi-dimensional network, where the metal complex is cross-linked during the reaction, in which the second reactant forms the multidimensional network.    USE - The crosslinked, organic metal complex is useful: as an emitter or absorber in an optoelectronic component including organic light-emitting diodes, light-emitting electrochemical cells, organic light-emitting diode-sensors, preferably non-hermetic gas- and vapor sensors shielded outwardly, optical temperature sensors, organic solar cells, organic field-effect transistors, organic diodes, organic photodiodes, or down conversion systems; or as an emitter material (optoelectronic ink) for the optoelectronic component; and for crosslinking the metal complex with the second reactant for forming the multi-dimensional network (all claimed).    ADVANTAGE - The method ensures stability with improved geometric structure of the metal complexes that prevents movement of the ligand, and thus a structural change is prevented, providing improved charge-carrier injection and an increased recombination probability to the metal complex, provides improved stability and durability of the layers containing the metal complex, and enables multilayer arrangements of photoactive layers in a quick and simple manner without requiring orthogonal solvents or photochemical hardening steps.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for:    (1) the cross linked, organic metal complex obtainable by the above method;    (2) producing a layer comprising the crosslinked, organic metal complex, comprising applying a reaction mixture from (i) the first reactant in the form an organic metal complex and (ii) second reactant for forming a multi-dimensional network, on a solid support, where the metal complex is cross-linked during the reaction of the first with the second reactant forming the multi-dimensional network; and    (3) organic metal complex with at least one metal and at least one ligand, comprising two anchoring groups of a first anchoring group species for reacting with an anchoring group of a second anchoring group species for cross-linking, where the anchoring group of the metal complex forms a covalent bond with the anchoring group of the second reactant for forming a multi-dimensional network, during the cross-linking reaction.