Nippon Steel Chemical Co., Ltd.

Pioneer Corporation

Nippon Steel & Sumikin Chemical Co., Ltd.

Shinji Matsuo

Hiroshi Miyazaki

Taishi Tsuji

Katsuhide Noguchi

Atsuhiko Katayama

Kazuo Ishii

Hiromi Hashimoto

This invention provides an organic EL material useful for the emissive layer of an organic EL element which deteriorates little in luminance when operated over a prolonged period of time and shows excellent durability. The material is an aluminum chelate complex which is represented by general formula (1) in which Aris a mono- or bicylic arylene group, Aris a mono- or bicyclic aryl group, R-Rare hydrogen or hydrocarbon groups containing 1-8 carbon atoms and contains a compound represented by general formula (1) in which Aris a halogen as an impurity in an amount of 350 wt ppm or less. 

Aluminum chelate complex for organic EL material

Disclosed is a process for producing an ortho-metalated 1:3 complex of iridium with homoligands which is useful as a luminous material for an organic EL device in high yield at high purity in a short time by a simple procedure. An example of the complex is tris(2-phenylpyridine)iridium(III) and this complex can be produced by reacting iridium(III) acetylacetonate with an organic ligand consisting of 2-phenylpyridine in the copresence of an acidic substance, either an organic acid such as tartaric acid or an inorganic acid such as phosphoric acid.

Process for producing ortho-metalated complex of iridium with homoligand

Disclosed is an organic electroluminescent device (organic EL device) that utilizes phosphorescence and is improved in luminous efficiency and fully secured of driving stability. The organic EL device comprises an anode, an organic layer containing a hole-transporting layer, a light-emitting layer, and an electron-transporting layer, and a cathode piled one upon another on a substrate while the hole-transporting layer is disposed between the light-emitting layer and the anode and the electron-transporting layer is disposed between the light-emitting layer and the cathode. The light-emitting layer comprises an aluminum heterocomplex or dimeric complex of deuterated substituted or unsubstituted 2-methyl-8-hydroxyquinoline (Me8HQ-D) in which the hydrogen atoms in the methyl group of substituted or unsubstituted 2-methyl-8-hydroxyquinoline (Me8HQ) are deuterated as a host material and an organic metal complex containing at least one metal selected from groups 7 to 11 of the periodic table as a guest material.

Organic electroluminescent device material and organic electroluminescent device

Growing community of inventors

Fukuoka, Japan

Shinji Matsuo