TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preparation (Claimed): Preparation of (Q) comprises reacting copper or silver metal ion with (I) and a chromophore ligand. Preferred Components: The metal complex has: an Delta E(S1-T1)-value of less than 1500 cm-1, preferably less than 500 cm-1; an emission quantum yield of an organic polymer or as a solid of greater than or equal to 60%, preferably greater than 70%; an emission life period of more than 20 mu s, preferably less than 3 mu s; and/or a solubility in organic solvents of at least 10 g/l. (Q) comprises a thermally-activated fluorescence. The amount of (Q) in an emitter layer is 2-100 wt.%, preferably 4-30 wt.%. The optoelectronic device comprises a copper- or silver-emitter metal complex with (I). The chromophore ligand is of formula (II). The ligand 1 comprises tricyclo(8.2.2.2,4,7)hexadeca-1(13),4(16),5,7(15),10(14),11-hexaene) compounds of formulae (a)-(h). The chromophore ligand comprises 41 ligand e.g. 2,4,7,9-tetramethyl-1,10-phenanthroline; 2-(3,5-dimethylpyrazol-1-yl)-4,6-dimethyl-pyridine; 1,2,3,4,9,10,11,12-octahydroquinolino(3,2-c)acridine; 1-(3,5-dimethylpyrazol-1-yl)-3-methyl-isoquinoline; 4,7-dimethoxy-1,10-phenanthroline; 4,7-dimethoxy-2,9-dimethyl-1,10-phenanthroline; 2,9-dimethyl-5,6-dihydro-1,10-phenanthroline; 4,7-dimethyl-1a,9b-dihydrooxireno(2,3-f)(1,10)phenanthroline; 5-methoxy-2,9-dimethyl-1,10-phenanthroline; N,N,2,9-tetramethyl-1,10-phenanthrolin-5-amine; N,2,9-trimethyl-1,10-phenanthrolin-5-amine; 4,7-dibutoxy-2,9-dimethyl-1,10-phenanthroline; 2,9-dimethyl-4,7-dipentyl-1,10-phenanthroline; and N,N-dibutyl-2,9-dimethyl-1,10-phenanthrolin-4-amine.B1 = optional bridging group comprising -C(R4a)(R5a)-, -B(R4a)(5a)-, -N(R4a)-, -O- or -S-;Ar1, Ar2 = heterocyclic group of formulae (i)-(j);A1-A4 = CH, O, S, N, CR1a, or NR1a, where the atomic groups of A1 to A8 are optionally covalently linked through the respective pendant groups R1a; andR4a, R5a = H, alkyl, aryl, heteroaryl, or substituted (preferably halogenated substituted with OCH3, N(CH3)2, P(C6H5)2, CO2CH3, COCH3, CONCH3, NO2, or SCH3) alkyl, aryl or heteroaryl, where R4a and R5a are linked to each other and/or covalently linked with the radicals R1a of the fragments of Ar1 and/or Ar2. SPECIFIC COMPOUNDS - 29 Compounds (I) are specifically claimed, e.g. copper complex of formula (Ia), and metal complexes of formulae (Ib)-(Ie).    EXAMPLE - 37 mg of Tetrakis(acetonitrile)copper(I) hexafluorophosphate and 58 mg of (Rp)-(-)-4,12-bis(diphenylphosphino)-(2.2) paracyclophane were dissolved in 25 ml of dry acetonitrile under argon. The mixture was stirred at room temperature for 2 hours. Then, 21 mg of 2,9-dimethyl-1,10-phenanthroline was added to the reaction mixture. The mixture was stirred for further 2 hours. Then, the solvent was removed by rotary evaporation under vacuum. The resulting solid was dissolved in dichloromethane dissolved and chromatographed through a short column of aluminum oxide. Copper(I) complex ((Cu(dmp)(phanephos))(PF6)) was crystallized from a dichloromethane/ethyl acetate (1:10) mixture at -30 degrees C.