Mitsubishi Chemical Corporation

Pioneer Corporation

Masayoshi Yabe

Koichiro Iida

Hideki Sato

Tomoyuki Ogata

Kazuki Okabe

Masako Takeuchi

Masayo Fugono

Taishi Tsuji

Yuichiro Kawamura

Yanjun Li

Hironori Ishikawa

Kyoko Endo

Shin Kawami

Asato Tanaka

Mitsuru Tanamura

Toshiyuki Urano

Shinichi Suzuki

Toyoshi Ohashi

Misako Okabe

Takeshi Shioya

Kumiko Takenouchi

Yuichiro Mitsubishi Chemical Group Scien Kawamura

A composition for an organic electroluminescent device is a composition for forming an organic light emitting layer of an organic electroluminescent device by wet coating process. The composition contains a phosphorescent material, a charge transport material, and a solvent, in which the phosphorescent material and the charge transport material are each an unpolymerized organic compound, and the first oxidation potential of the phosphorescent material E, the first reduction potential of the phosphorescent material E, the first oxidation potential of the charge transporting material E, and the first reduction potential of the charge transporting material Esatisfy the following condition: E+0.1&#x2266;E&#x3c;E&#x2266;E&#x2212;0.1 or E+0.1&#x2266;E&#x3c;E&#x2266;E&#x2212;0.1.

Organic electric field light emitting element and production therefor

Disclosed is an organic electroluminescence device having a longer drive life. The organic electroluminescence device includes a light emitting layer which contains a luminescent dye and a host material having a nitrogen-containing aromatic heterocyclic ring. The luminescence resulting from the hole transport layer adjacent to the light emitting layer is less than one-hundredth of the luminescence resulting from the luminescent dye.

Organic electroluminescence device

Disclosed is an organic electroluminescent device having a longer drive life. Specifically disclosed is an organic electroluminescent device () comprising an organic material layer (), which is composed of a hole transporting layer (), a light-emitting layer () and an electron transporting layer (), between a pair of electrodes, namely a cathode () and an anode (). The light-emitting layer () (having a film thickness (dM) of 5-3000 nm) contains a luminescent dye and a host material. The first oxidation potential (ED+) of the luminescent dye is lower than the first oxidation potential (EH+) of the host material, while the first reduction potential (ED&#x2212;) of the luminescent dye is lower than the first reduction potential (EH&#x2212;) of the host material. The film thickness (dE: 5-3000 nm) of the electron transporting layer () and the film thickness (dH: 5-3000 nm) of the hole transporting layer () satisfy the following relation: dH&#x2266;dE.

Organic electroluminescence element

The present invention provides an organic electroluminescent device exhibiting a long life, a high luminance, and a high efficiency. An organic electroluminescent device comprising on a substrate an anode, a hole transport layer, an organic light-emitting layer, and a cathode, wherein the organic light-emitting layer contains an organic compound having a pyridine ring, a pyrazine ring, or a triazine ring as a partial structure and the hole transport layer contains a monoamine compound represented by the following formula (I): wherein Rto Rrepresent a hydrogen atom, an aryl group, or an alkyl group; Rto Rmay be the same or different from each other; and Rto Rmay further have an aryl group or an alkyl group as a substituent in the case where Rto Rare an aryl group or an alkyl group.

Monoamine compound, charge-transporting material, and organic electroluminescent device

A polymer, a luminescent material, and the likes are provided, wherein a film can be formed by a wet film-forming method, the film formed has a high stability, and is capable of being laminated with other layers by a wet film-forming method or another method, which are less decrease in charge transportation efficiency or luminescent efficiency, and attain an excellent driving stability. The polymer has a thermally dissociable and soluble group.

Polymers containing thermally dissociable and soluble groups and the use of such polymers as organic electroluminescent materials

An object of the invention is to provide a polymer compound having a high hole transport capacity, excellent in electrochemical stability, and suitable to film formation according to a wet film formation method. Another object of the invention is to provide an organic electroluminescence element having a high current efficiency, a low drive voltage, and a long derive lifetime. The polymer compound has a crosslinking group bonding to the arylamine moiety in the repeating unit via at least one single bond therebetween.

Polymer compound, net-like polymer compound produced by crosslinking the polymer compound, composition for organic electroluminescence element, organic electroluminescence element, organic EL display, and organic EL lighting

[Problem to be solved by the Invention] An organic electroluminescence device having a longer drive life is provided. [Means for solving the Problem] An organic electroluminescence device comprises, between a pair of electrodes composed of an anode and a cathode, a light emitting layer, a hole transport layer provided on the anode side of the light emitting layer, and an electron transport layer provided on the cathode side of the light emitting layer. At least one layer among the layers constituting the electron transport layer includes an electron movement suppressing material which suppresses the movement of electrons.

There are provided an organic having both excellent hole transporting property and satisfactory electron transporting and showing excellent durability against electric oxidation/reduction and a high triplet excitation level, and a charge transporting material and an organic electroluminescent device each using the organic compound. The organic compound is represented by following Formula (I): wherein Czand Czeach represent a carbazolyl group; Z represents a direct bond or an arbitrary linkage group enabling the conjugation of nitrogen atoms in the carbazole rings of Czand Czwith each other; and Q represents a direct bond connecting to 'G' in following Formula (II): 

Organic compound, charge-transporting material, and organic electroluminescent element

To provide an organic electroluminescence device that can suppress rise in the driving voltage at the time of constant-current energization and degradation in brightness at the time of energization, and thus excels in its driving lifetime, the organic electroluminescence device comprises: a substrate; an anode and a cathode overlying the substrate; and a plurality of organic layers disposed between the anode and the cathode, and the plurality of organic layers comprise at least: a first layer formed by means of polymerization of a polymerizable compound; and a second layer disposed adjacently to the first layer and containing a polymerization initiator.

Organic electroluminescence device and method of producing organic device

An organic compound and a charge-transporting material which are excellent in both a hole-transporting property and an electron-transporting property and have excellent electrical oxidation/reduction durability and a high triplet excitation level are provided, and an organic electroluminescent device which uses this organic compound and has high luminous efficiency and high driving stability and long lifetime is provided, wherein the organic compound has two or more partial structures represented by the following Formula (I):  

Organic compound containing at least two carbazolyl-substituted phenyl structures; charge-transporting material and organic el element containing the compound

An organic compound is represented by following Formula (I): 

Organic compound, charge transport material and organic electroluminescent device

An organic compound having excellent heat resistance, an excellent amorphous nature, an excellent ability to transport charges, highly excited singlet and triplet states, and excellent solubility in an organic solvent is an organic compound represented by Formula (I):  

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Kanagawa, Japan

Masayoshi Yabe