TECHNOLOGY FOCUS - ELECTRONICS - Preferred Components: The organic electroluminescent device has the electroluminescent peak with wavelength of blue and green at the same time. In the device, a mixed region of reductive dopant and organic substance, or a mixed region of oxidative dopant and organic substance is placed on the inner surface of one or both electrodes among the pair of electrodes.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (Disclosed): Preparation of (I) comprises: mixing iridium trichloride and subsidiary ligand of formula (L-H) in a solvent including alcohol or a mixed solvent of alcohol/water, such as 2-ethoxyethanol, and 2-ethoxyethanol/water mixtures at a molar ratio of 1:2-3; heating the mixture under reflux before isolating diiridium dimer compound of formula (II); and heating (II) with a primary quinoline ligand of formula (III) in the presence of silver(I) triflate, sodium carbonate or sodium hydroxide with organic solvent such as 2-ethoxyethanol and 2-methoxyethylether to give (I) (where n is 1). Preferred Components: The organic layer comprises: arylamine compounds and/or styrylarylamine compounds, or organic metals of group 1, group 2, 4th period and 5th period transition metals, lanthanide metals and/or d-transition elements; and an electroluminescent layer and a charge generating layer. Preferred Definitions:    Either R8 = phenyl; or    R7R8 = phenyl, naphthyl, 9H-fluorene or biphenyl (all substituted);    L = pyridine-2-carboxylate, 2-(1H-pyrrol-2-yl)-pyridine, 2-(1H-imidazol-2-yl)-pyridine, 2-pyridin-2-yl-1H-benzoimidazole or 2-phenyl-1H-imidazole group of formula (f) (all substituted by R34), dioxy propane group of formula (g), 2-phenyl-1H-benzoimidazole or 6-phenyl-nicotino-yl of formula (h) (both substituted by R36), 2-phenyl-pyridine, 2-naphthalen-2-yl-pyridine, 2-naphthalen-1-yl-pyridine or benzo(h)quinoline (all substituted by R36 and R34), 2-phenyl-quinoline, 3-phenyl-isoquinoline or 1-phenyl-isoquinoline (all substituted by R36 and R37), 2-cyclopent-1-enyl-quinoline, 1-vinyl-isoquinoline of formula (i) or 2-vinyl-quinoline of formula (j) (all substituted by R37), 2-(9H-fluoren-2-yl)-pyridine of formula (k) (substituted by R38 and R34), 2-(9H-fluoren-2-yl)-quinoline of formula (l) (substituted with R38 and R37);    R31, R32 = 1-60C alkyl (optionally substituted by halo), phenyl (optionally substituted by 1-60C alkyl or halo), H or D;    R33-R38 = phenyl (optionally substituted by 1-60C alkyl, tri(1-60C)alkylsilyl or halo), H or 1-60C alkyl;    R39-R42 = phenyl (optionally substituted by 1-60C alkyl), H, D, or 1-60C alkyl; and    R43 = phenyl (optionally substituted by 1-60C alkyl or halo), D or 1-60C alkyl.    SPECIFIC COMPOUNDS - 1198 Compounds (I) are disclosed e.g. substituted quinoline iridium complexes of formulae (Ia-Ie).    EXAMPLE - 2-Chloro-5-fluoroquinoline (0.7 g), phenyl boronic acid (0.5 g) and tetrakis(triphenylphosphine)palladium(0) (0.2 g) were dissolved in toluene (25 ml) and ethanol (10 ml). After adding aqueous 2M sodium carbonate solution (10 ml), the resultant mixture was stirred at 120 degrees C under reflux for 4 hours. Then, the mixture was cooled to 25 degrees C, and distilled water (200 ml) was added to terminate the reaction and worked up to give 5-fluoro-2-phenyl-quinoline (a1). (a1) (0.7 g) and iridium chloride (1 g) were added to 2-ethoxyethanol (20 ml) and distilled water (7 ml), and the solution was heated under reflux in the presence of argon gas atmosphere for 24 hours. When the reaction was completed, the reaction mixture was cooled to room temperature to give a 5-fluoro-2-phenyl-quinoline iridium complex of formula (a2). (a2) (0.7 g), 2,4-pentanedione (0.1 ml) and sodium carbonate (0.6 g) were dissolved in 2-ethoxyethanol (40 ml), and the resultant mixture was heated for 4 hours. When the reaction was completed, the reaction mixture was cooled to room temperature to give (Ia) (0.4 g).