NOVELTY - Binucleated metal(I) complex (I) is new.    USE - (I) is useful: as emitter and absorber in optoelectronic component (including organic light-emitting devices (OLEDs), light-emitting electrochemical cells, OLED sensors, preferably in non-hermetically outwardly shielded gas and vapor sensors, organic solar cells, organic field effect transistors, organic lasers, down-conversion elements, organic transistor, organic diode) obtained by vacuum evaporation method and solution, and to convert ultraviolet radiation and blue light into visible light, preferably into green, yellow and red light (down conversion); as an emissive material in an emissive layer, in which it is either used as a pure layer and/or a matrix material including ketones, phosphine oxides, sulfoxides, sulfones, triarylamine, carbazole derivatives, phenoxazine derivatives, phenothiazines, indolocarbazole derivatives, azacarbazole, bipolar matrix materials, silanes, azaborole, boronic esters, triazine derivatives, zinc complexes, diazasilol- and tetraazasilol derivatives, benzophenone derivatives, diphenylmethane derivatives and/or ultra-high-energy-gap matrix materials); and for changing emission- and/or absorption characteristics of an electronic component (all claimed).    ADVANTAGE - (I) provides emitter materials with improved properties.    DETAILED DESCRIPTION - Binucleated metal(I) complex of formula (I) is new.    M1, M2 = Cu, Ag or Au;    X = Cl, Br, I or pseudohalogenide;    E1, E2 = P or As;    Z1, Z2 = N or C (where Z, Z' and N is present between either a single bond or a double bond);    B1, B2 = CH2, CHR''', CR'''R'''', O, S, Se, NR''', PR''' or AsR'''';    R''' = alkyl, aryl, hereroaryl, OR, SR, Ser, H, deuterium (where B1 and B2 bridged with a minimum of 2-17 members;    R'''' = not defined;    G1, G2 = 5- or 6-membered heteroaromatic ring system (optionally substituted with R or R', or fused with further aromatic rings);    R, R' = linear alkyl, alkoxy or thioalkoxy having 1-40C, linear alkenyl or alkynyl having 2-40C, branched or cyclic alkyl, alkenyl, alkynyl, alkoxy or thioalkoxy having 3-40C (all optionally substituted with R2, at least one non-adjacent CH2 group is optionally replaced with R2C=CR2, C=C, Si(R2)2, Ge(R2)2, Sn(R2)2, C=O, C=S, C=Se, C=NR2, P(=O)(R2), SO, SO2, NR2, O, S or CONR2 and at least one hydrogen atoms is optionally replaced with deuterium, F, Cl, Br, I, CN, CF3 or NO2), aromatic or heteroaromatic ring system having 5-60C, aryloxy or heteroaryloxy group having 5-60C, diarylamino, diheteroarylamino, arylheteroarylamino having 10-40C (all optionally substituted with R2), H, deuterium, F, Cl, Br, I, N(R2)2, CN, CF3, NO2, OH, COOH, COOR2, CO(NR2)2, Si(R2)3, B(OR2)2, C(=O)R2, P(=O)(R2)2, S(=O)R2, S(=O)2R2, OSO2R2, where at two R and R' are fused together to form a mono- or polycyclic, aliphatic, aromatic and/or benzo-fused ring system;    R2 = linear alkyl, alkoxy or thioalkoxy having 1-40C, linear alkenyl or alkynyl having 2-40C, branched or cyclic alkyl, alkenyl, alkynyl, alkoxy or thioalkoxy having 3-40C (all optionally substituted with R3, at least one non-adjacent CH2 group is optionally replaced with R3C=CR3, C=C, Si(R3)2, Ge(R3)2, Sn(R3)2, C=O, C=S, C=Se, C=NR3, P(=O)(R3), SO, SO2, NR3, O, S or CONR3 and optionally at least one H-atom is replaced with deuterium, F, Cl, Br, I, CN, CF3 or NO2), aromatic or heteroaromatic ring system having 5-60C, aryloxy or heteroaryloxy having 5-60C, diarylamino, diheteroarylamino, arylheteroarylamino having 10-40C (all optionally substituted with R3), H, deuterium, F, Cl, Br, I, N(R3)2, CN, CF3, NO2, OH, COOH, COOR3, CO(NR3)2, Si(R3)3, B(OR3)2, C(=O)R3, P(=O) (R3)2, S(=O)R3, S(=O)2R3 or OSO2R3, where at two R2 are fused together to form a mono- or polycyclic, aliphatic, aromatic and/or benzo-fused ring system; and    R3 = H, deuterium, F, CF3 or 1-20C aliphatic, aromatic and/or heteroaromatic hydrocarbyl (at least one H is optionally replaced with F or CF3), where at least two R3 are fused together to form a mono- or polycyclic, aliphatic ring system.    Provided that the bridge length of the bridge B1 and B2 is 2-4 optionally substituted units, preferably 2-4 optionally substituted units. INDEPENDENT CLAIM is also included for:    (1) preparing (I);    (2) optoelectronic component, comprising (I);    (3) producing the optoelectronic component using (I);    (4) changing emission- and/or absorption characteristics of an electronic component comprising introducing (I) in a matrix material for the conduction of electrons or holes in an optoelectronic component, preferably by vacuum evaporation; and    (5) composition comprising (I) and a host material in which triplet (T1)- and singlet (S1)-energy levels of the host material are higher in energy than the triplet (T1)- and singlet (S1)-energy levels of (I), where (I) exhibits fluorescence or thermally activated delayed fluorescence and Delta E(S1-T1) value between the lowest excited singlet (S1)- and the underlying triplet (T1)-state is less than 2000 cm-1.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the organic light emitting diode.