1865 results about "Anthracene" patented technology

An OLED device comprises a cathode, an anode, and has therebetween a light emitting layer containing a host material and an emitting dopant material wherein the host includes a monoanthracene compound bearing aromatic groups in the 2-, 9-, and 10-positions and being further substituted or not with electron donating groups sufficient so as to provide an anthracene derivative that exhibits a measured oxidation potential of less than 1.28 V.

An OLED device comprises a cathode, a light emitting layer and an anode, in that order, wherein

(i) the light-emitting layer comprises up to 10 volume % of a light emitting compound and at least one anthracene host compound of Formula (3):

wherein

• • W₁-W₁₀ independently represents hydrogen or an independently selected substituent, and (ii) a further layer located between the cathode and the light emitting layer, contains (a) 10-volume % or more of an anthracene compound of Formula (3) and (b) at least one salt or complex of an element selected from Group IA, IIA, IIIA and IIB of the Periodic Table. Such devices exhibit reduced drive voltage while maintaining good luminance.

An OLED device comprises a cathode, an anode, and a light-emitting layer therebetween, and additionally comprises a layer between the cathode and the light-emitting layer including a compound comprising one and only one anthracene nucleus bearing no more than two phenanthroline-containing substituents wherein said anthracene nucleus is substituted in the 2-, 3-, 6-, or 7-position with a phenanthroline-containing substituent. When such materials are included in a layer, such as an electron-transporting layer, that provide both desirable electroluminescent properties as well as good device stability.

Precursor materials useful for making organic electroluminescent devices such as anthracene derivatives having the structure: R40-R43 and R44-R47 are selected independently from the group consisting of hydrogen, alkyl, aryl, heteroalkyl, heteroaralkyl, nitro, cyano, hydroxy, alkoxy, aryloxy, thio, alkylthio, arylthio, amino, halogen, dialkylamino, diarylamino, diaralkylamino, arylamino, alkylamino, arylalkylamino, carbonyloxy, carbonylalkoxy, carbonylalkyloxy, alkylcarbonyloxy, arylcarbonyloxy, alkoxylcarbonyloxy, sulfonyl, sulfonyloxy. R48 and R49 are selected independently from the group consisting of trialkoxysilyl, dialkoxysilyl, trichlorosilyl, dichlorosilyl, heptachlorotrisiloxy, and pentachlorodisiloxy.

An organic electroluminescence device which comprises a cathode, an anode and an organic thin film layer comprising at least one layer comprising a light emitting layer and disposed between the cathode and the anode, wherein at least one layer in the organic thin film layer comprises an anthracene derivative having a specific structure singly or as a component of a mixture, and an anthracene derivative having a specific asymmetric structure and providing an organic electroluminescence device exhibiting a great efficiency of light emission and having a long life, are provided.

An organic electroluminescence device having a layer of an organic light emitting medium which comprises (A) a specific arylamine compound and (B) at least one compound selected from specific anthracene derivatives, spirofluorene derivatives, compounds having condensed rings and metal complex compounds and is disposed between a pair of electrodes and an organic light emitting medium comprising the above components (A) and (B) are provided. The organic electroluminescence device exhibits a high purity of color, has excellent heat resistance and a long life and efficiently emits bluish to yellowish light. The organic light emitting medium can be advantageously used for the organic electroluminescence device.

Novel materials for electron injection/transportation and emitting layers can greatly improve the stability of an organic electroluminescent display. Electroluminescent displays incorporating these materials produce blue light at low voltage levels. These novel organic materials include compounds in which 1 to 2 imidazole functional groups are introduced in the 2 or 2,6-site of 9,10 substituted anthracene. An organic electroluminescent display with an organic compound layer of these materials has high efficiency, thermal stability, operationally stability and maintains driving voltage before and after operation.

The present invention is a light emitting device material characterized by containing an anthracene compound represented by the following general formula (1) or general formula (3), and the present invention allows a light emitting device having high luminous efficiency and excellent durability.

(R¹ to R¹⁰ are a hydrogen atom, alkyl group, cycloalkyl group, heterocyclic group or the like. At least one of the R¹ to R¹⁰ is a substituent represented by the following general formula (2).)

(R¹¹ to R¹⁸ are a hydrogen atom, alkyl group and cycloalkyl group. X is an oxygen atom or sulfur atom, and Y is a single bond; arylene group or heteroarylene group. Any one of the R¹¹ to R¹⁸ is used for linking with Y, and α is used for linking with the anthracene skeleton.)

(R¹⁹ to R³⁷ are a hydrogen atom, alkyl group, cycloalkyl group, heterocyclic group or the like. n is 1 or 2. A is a heteroarylene group or arylene group. Any one of the R¹⁹ to R²⁷ and any one of the R²⁸ to R³⁷ are used for linking with A.)

Fused ring bridge, ring locked dyes that form thermally stable photorfractive compositions. The fused ring bridge structures are pi -conjugated bonds in benzene-, naphthalene- or anthracene-derived fused ring systems that connect donor and acceptor groups. The donor and acceptor groups contribute to a high molecular dipole moment and linear polarizability anisotropy. The polarization characteristics of the dye molecules are stabilized since the bonds in the fused ring bridge are not susceptible to rotation, reducing the opportunity for photoisomerization. The dyes are compatible with polymeric compositions, including thermoplastics. The dyes are electrically neutral but have charge transport, electronic and orientational properties such that upon illumination of a composition containing the dye, the dye facilitates refractive index modulation and a photorefractive effect that can be utilized advantageously in numerous applications such as in optical quality devices and biological imaging.

This invention relates to compositions and electroluminescent (EL) devices that have enhanced performance as a result of a novel class of anthracene derivatives used as host materials for a full range of color dopands. When using coumarin derivatives as color dopands in the anthracene derivatives in an EL device, the device performs a desirable light emitting efficiency and durability. The performance of the EL device can be further improved by using benazole derivatives as the electron transporting layer. The organic EL device of the present invention is useful in preparing display devices.

Provided are an anthracene derivative having a heteroaryl group containing a nitrogen-containing six-membered ring and having a specific structure and an organic electroluminescence device in which an organic thin film layer comprising a single layer or plural layers including at least a light emitting layer is interposed between a cathode and an anode, wherein at least one layer in the above organic thin film layer contains the anthracene derivative described above in the form of a single component or a mixed component. Provided are the organic electroluminescence device in which homogeneous light emission is obtained over a long period of time and which has a long lifetime and the anthracene derivative which materializes the same.

An OLED device comprises an anode and a cathode and located there-between a light emitting layer containing a light emitting dopant and a host comprising a monoanthracene derivative.

An OLED device for emitting white light comprises adjacent layers 1 and 2 wherein layer 1 contains a host and a yellow, orange, or red emitter and layer 2 contains a host and a blue or blue-green light emitter wherein the host in layer 2 comprises an anthracene material bearing an aromatic ring bonded to the 2-, 9-, and 10-positions of the anthracene nucleus.

An OLED device comprises a cathode, an anode, and located therebetween a light emitting layer, the device comprising a further layer between the light-emitting layer and the anode but not contiguous to the light-emitting layer, the further layer containing a 2,6-diamino-substituted anthracene compound and containing a larger volume percentage of the 2,6-diamino-substituted anthracene compound than the layer contiguous to the light-emitting layer on the anode side.

An organic electroluminescence device of the present invention comprises a light emitting layer held between electrodes, the light emitting layer containing at least a host material and a dye or pigment. The light emitting layer further comprises an additive exhibiting an absorption edge of which energy level is higher than that of an absorption edge of the dye or pigment, but the difference of the energy levels being less than 120 kJ/mol, having no lone pair, and including at least two aromatic rings. The additive of the present invention is selected from a group consisting of phenyl-substituted anthracenes, naphthyl-substituted anthracenes, naphthyl-substituted naphthalenes, pyrenes, and a naphthacene derivatives.

Provided are a novel anthracene derivative of a specific structure in which benzofuran or benzothiophene is bonded to anthracene through an arylene group, a material for an organic electroluminescence device and a light emitting material for an organic electroluminescence device each containing the anthracene derivative, and an organic electroluminescence device including an organic thin film layer formed of one or plural layers including at least a light emitting layer, the organic thin film layer being interposed between a cathode and an anode, in which at least one layer of the organic thin film layer contains the anthracene derivative alone or as a component of a mixture. The organic electroluminescence device has high luminous efficiency and is capable of emitting light with a long lifetime, and the device can be realized by the anthracene derivative.

It is an object of the present invention to provide a novel material capable of realizing excellent color purity of blue, and a light emitting element and a light emitting device using the novel material. Further, it is an object of the present invention to provide which is highly reliable, and a light emitting element and a light emitting device using the novel material. The structure for solving the above problems in accordance with the present invention is an anthracene derivative simultaneously having a diphenylanthracene structure and a carbazole skeleton in a molecule as represented by structural formula (1):

The present invention relates to a light-emission-layer material comprising: a novel polycyclic aromatic compound (1) in which a plurality of aromatic rings are linked by a boron atom and a nitrogen atom; and a specific anthracene-based compound (3) that achieves optimum light-emission characteristics in combination with said polycyclic aromatic compound. With this light-emission-layer material having optimum light-emission characteristics, it is possible to provide an excellent organic EL element.

Ring A to ring C are an aryl ring or the like, X is a group represented by formula (3-X1), formula (3-X2), or formula (3-X3), and Ar¹ to Ar⁴ are phenyl, a group represented by formula (4), or the like.

A novel aromatic compound having an anthracene skeleton structure and an asymmetric molecular structure; and an organic electroluminescence device which comprises a cathode, an anode and an organic thin film layer comprising at least one layer containing a light emitting layer and sandwiched between the cathode and the anode in which at least one layer in the organic thin film layer contains the above novel aromatic compound singly or as a component of a mixture. The organic electroluminescence device exhibits a great luminance of emitted light, a great efficiency of light emission and a high purity of color, emits bluish light, is excellent in stability at high temperatures and has a long life. The organic electroluminescence device can be provided by utilizing the novel aromatic compound.