TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preparation (Claimed): The preparation of (I) comprises reacting the ligand with iridium alcoholate of formula (Ir(OR1)2), iridium ketoketonate of formula (IVa), iridium halide of formula (Ir(Hal)n) or dimeric iridium complex of formula (IVb) or (IVc) or reacting ligand L with iridium complexes of formula (Ir(L1)2(HOCH3)2)A and (Ir (L1)2(NCCH3)2)A or reacting ligands L1 with iridium complexes of formula ((Ir (L)2(HOCH3)2)b) and ((Ir(L)2(NCCH3)2)b), or using iridium compounds comprising both alkoxide, halide, hydroxy and ketoketonate as starting materials.Hal = F, Cl, Br or I; andA = non-coordinating anion.Preferred Components: (I) is used as emitting compound in at least one emitting layer. The ketones, phosphine oxides, sulfoxides, sulfones, triarylamines, carbazoles, indolocarbazoles, indenocarbazole, azacarbazole, bipolar matrix materials azaborole, boronic esters, diazasilole, diazaphosphole, triazines, zinc complexes, beryllium complex, dibenzofuran and/or bridged carbazole derivatives as a matrix material for (I). SPECIFIC COMPOUNDS - 16 Compounds (I) are disclosed, e.g. tris(7-bromo-13-azapentacyclo(14.2.1.0(2,15).0(3,12).0(6,11))nonadeca-2(15),3,5,7,9,11,13-heptaene) iridium complex (Ia), tris((7E,8E)-7-(1-bromoallylidene)-8-ethylidene-3,3-dimethyl-2,3,7,8-tetrahydrothieno(2,3-b)quinoline) iridium complex, tris(7'-bromo-2'H-spiro(cyclopentane-1,3'-furo(2,3-b)naphtho(2,3-h)quinoline)) iridium complex, tris(1-bromo-7,7,9,9-tetramethyl-8,9-dihydro-7H-benzo(h)cyclopenta(c)quinoline)iridium complex and tris (7-(3-(3,5-diphenylphenyl)phenyl)-13-azapentacyclo(14.2.1.0(2,15).0(3,12).0(6,11))nonadeca-2(15),3,5,7,9,11,13-heptaene)iridium complex.    EXAMPLE - Suspension of 11.3 g tris(13-azapentacyclo(14.2.1.0(2,15).03,12.0(6,11))nonadeca-2(15),3,5,7,9,11,13-heptaene) iridium complex was added to 3000 ml dichloromethane and stiired at 30 degrees C. Then 5.9 g N-bromosuccinimide was added and stirred for 20 hours. 2900 ml dichloromethane was removed in vacuum, and the yellow suspension was mixed with 100 ml methanol and suction filtered. The solid was washed three times with 30 ml methanol, and then dried in vacuum to obtain (Ia).