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 3,4-diphenyl-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) or H;    R33-R39 = phenyl (optionally substituted by 1-60C alkyl, tri(1-60C)alkylsilyl or halo), H or 1-60C alkyl; and    R40-R43 = phenyl (optionally substituted by 1-60C alkyl), H or 1-60C alkyl.    SPECIFIC COMPOUNDS - 1009 Compounds (I) are disclosed e.g. 3,4-diphenyl-quinoline iridium complexes of formulae (Ia-Ie).    EXAMPLE - 2-Aminobenzophenone (10 g), 1-phenylacetophenone (9 g), acetic acid (169 ml) and sulfuric acid (10 drops) were charged in a reaction vessel, and the mixture was stirred under reflux in the presence of argon atmosphere and worked up to give 2,3,4-triphenyl quinoline (a1). (a1) (9 g) and iridium chloride (3.4 g) were dissolved in 2-ethoxyethanol (38 ml) and distilled water (13 ml), and the solution was stirred under reflux for 24 hours and worked up to give 2,3,4-triphenyl quinoline iridium complex of formula (a2). (a2) (6.9 g), 2,4-pentanedione (1.2 g) and sodium carbonate (3.1 g) were dissolved in 2-ethoxyethanol (100 ml) and the solution was heated for 4 hours and worked up to give (Ia) (4.2 g).