TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preparation (Claimed): The preparation of (I), comprises (i) adding a 2-phenylquinoline compound ligand of formula (II) (22 mmol), iridium(III) chloride trihydrate (10 mmol) into a reaction system under nitrogen atmosphere, adding ethylene glycol diethyl ether (300 ml) and pure water (100 ml) and mixing, refluxing obtained mixed solution for 24 hours under nitrogen atmosphere, then cooling to room temperature, precipitating, filtering the precipitate, washing with water, drying, washing with dichloromethane, purifying it by silica gel column chromatography, and concentrating obtained precipitate to obtain 2-phenylquinoline compound-iridium bridged ligand of formula (III), (ii) taking (III) (4 mmol), adding anhydrous sodium carbonate (4.5 g), then adding ethylene glycol ethyl ether (200 ml) and acetylacetone (16 mmol) under nitrogen atmosphere, and refluxing for 10-15 hours, cooling to room temperature, settling and separating out obtained solid, filtering, washing it with water, drying, washing with dichloromethane, purifying it by silica gel column chromatography, and concentrating obtained precipitate.    TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: At least one organic material layer comprising (I) is present between anode and cathode terminals of an organic electronic device. The organic material layer includes a light emitting material, a hole transporting material, an electron transporting material, a hole injecting material, an electron injecting material, a hole blocking material and an electron-blocking material. SPECIFIC COMPOUNDS - 30 compounds (I) are specifically claimed e.g. bis(4,6-dimethyl-2-phenylquinoline)(acetylacetonate)iridium(III) (Ia), bis(6-methyl-2,4-diphenylquinoline)(acetylacetonate)iridium(III), bis(4-methyl-2-phenyl-6-(thiophen-2-yl)quinoline)(acetylacetonate)iridium(III), bis(2,4-diphenyl-6-(trimethylsilyl)quinoline)(acetylacetonate)iridium(III) and bis(2,6-diphenyl-4-(4-(1-phenyl-1H-benzo(d)imidazol-2-yl)phenyl)quinoline)(acetylacetonate)iridium(III).