57143results about "Luminescent compositions" patented technology

One embodiment of the present invention is a color EL display characterized in that at least color filters, a thin film transistor circuit, an organic EL layer, and a common electrode are laminated in this order on a transparent substrate. Another embodiment of the invention is a method for producing a color EL display comprising the steps of forming color filters or a transparent substrate; forming a thin film transistor circuit; forming an organic EL layer; and forming a common electrode, wherein process temperatures of the steps of forming the thin film transistor circuit and subsequent steps are 200° C. or less.

An organic electroluminescent element comprising a light emission layer and a hole blocking layer adjacent to the light emission layer, wherein, (i) the light emission layer contains a compound having a specified partial structure and having a molecular weight of not more than 1700; and (ii) the hole blocking layer contains a derivative selected from the group consisting of a styryl derivative, a boron derivative and a carboline derivative.

Provided are a novel aromatic amine derivative having a specific structure and an organic electroluminescence device in which an organic thin layer comprising a single layer or plural layers including a light emitting layer is interposed between a cathode and an anode, wherein at leas one layer of the above organic thin layer contains the aromatic amine derivative described above in the form of a single component or a mixed component. Thus, the organic electroluminescence device is less liable to be crystallized in molecules, improved in a yield in producing the organic electroluminescence device and extended in a lifetime.

An organometallic complex and an organic light-emitting element containing the complex which has a very high efficiency, a high luminance, and durability. The organic light-emitting element has an anode, a cathode, and a layer including an organic compound sandwiched between the anode and cathode. The layer containing the organic compound includes at least one organometallic complex represented by General Formula [I] below.

An aromatic amine derivative with a specific structure having a carbazole skeleton to which a diarylamino group bonds via a bonding group. An organic electroluminescence device which is composed of one or more organic thin film layers including at least one light emitting layer sandwiched between a cathode and an anode, wherein at least one of the organic thin film layers contains the aromatic amine derivative singly or as its mixture component. Organic electroluminescence devices with enhanced efficiency of light emission and a compound realizing the devices are provided.

The present invention provides a novel aromatic amine derivative 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, particularly a hole transporting layer contains the aromatic amine derivative described above in the form of a single component or a mixed component. Use of the aromatic amine derivative described above materialize an organic electroluminescence device which reduces a driving voltage and makes molecules less liable to be crystallized and which enhances a yield in producing the organic EL device and has a long lifetime.

The present invention relates to organic light emitting devices (OLEDs), and more specifically to phosphorescent organic materials used in such devices. More specifically, the present invention relates to emissive phosphorescent material which comprise at least one tridentate ligand bound to a metal center, wherein at least one of the bonds to the tridentate ligand is a carbon-metal bond.

An organic electroluminescent device including a pair of electrodes, and at least one organic layer including a luminescent layer between the pair of electrodes, in which the organic electroluminescent device includes at least one compound selected from the group consisting of the compounds represented by Formula (1), (2) and (3):

An organic EL element includes an organometallic complex including a rhenium atom; one ligand which has a coordinated nitrogen atom and a coordinated oxygen atom, each coordinated with the rhenium atom, and has at least one π conjugation part; and the other ligand coordinated with the rhenium atom in such a way that the ligand saturates the coordination number of the rhenium atom and the charge of the whole organometallic complex is neutral.

An organic light emitting device is provided. The device has an anode, a cathode and an organic layer disposed between the anode and the cathode. The organic layer comprises a compound further comprising one or more carbene ligands coordinated to a metal center.

An organic electroluminescent device having a pair of electrodes and at least one organic layer interposed between the pair of electrodes, in which the at least one organic layer contains at least one compound represented by formula (I):

• • wherein, Z¹ and Z² each independently represent a nitrogen-containing aromatic six-membered ring coordinated to the platinum through a nitrogen atom; Q¹ represents a group of atoms necessary for forming, together with the —C—C—, a nitrogen-containing aromatic five-membered ring; L¹ represents a single bond or a divalent linking group; and n is 0 or 1.

An organic electroluminescence device includes: a cathode; an anode; and a single-layered or multilayered organic thin-film layer provided between the cathode and the anode. The organic thin-film layer includes at least one emitting layer. The at least one emitting layer contains at least one phosphorescent material and a host material represented by the following formula (1).

In the formula, Ar₁, Ar₂, Ar₃, B₁, B₂, B₃ and B₄ each represent a substituted or unsubstituted benzene ring or a substituted or unsubstituted condensed aromatic hydrocarbon ring selected from a naphthalene ring, a chrysene ring, a fluoranthene ring, a phenanthrene ring, a benzophenanthrene ring, a dibenzophenanthrene ring, a triphenylene ring, a benzo[a]triphenylene ring, a benzochrysene ring, a benzo[b]fluoranthene ring and a picene ring. p is 0 or 1.

A luminescence device having a layer containing a metal coordination compound which has a partial structure MLm of formula (2) below and is preferably entirely represented by formula (3) below:MLmL'n (3),wherein M denotes a metal atom of Ir, Pt, Rh or Pd; represent mutually different bidentate ligands; m is 1 or 2 or 3; n is 0 or 1 or 2 with the proviso that m+n=2 or 3; the partial structure MLm is represented by formula (2) below (wherein B is an isoquinolyl group bonded to the metal M with its N and including a position-1 carbon atom bonded to a cyclic group A which includes the C bonded to the metal M), and the partial structure ML'n is represented by formula (4), (5) or (6) shown below. There is provided a luminescence device capable of high-efficiency luminescence and long-term high luminance and adapted to red luminescence.

An organic electroluminescence device includes: a cathode; an anode; and a single-layered or multilayered organic thin-film layer provided between the cathode and the anode. The organic thin-film layer includes at least one emitting layer. The at least one emitting layer contains at least one phosphorescent material and a host material represented by the following formula (1).

Ra-Ar¹-Rb  (1)

In the formula, Ar¹, Ra and Rb each represent a substituted or unsubstituted benzene ring or a condensed aromatic hydrocarbon ring selected from a substituted or unsubstituted naphthalene ring, a substituted or unsubstituted chrysene ring, a substituted or unsubstituted fluoranthene ring, a substituted or unsubstituted phenanthrene ring, a substituted or unsubstituted benzophenanthrene ring, a substituted or unsubstituted dibenzophenanthrene ring, a substituted or unsubstituted triphenylene ring, a substituted or unsubstituted benzo[a]triphenylene ring, a substituted or unsubstituted benzochrysene ring, a substituted or unsubstituted benzo[b]fluoranthene ring and a substituted or unsubstituted picene ring. Substituents for Ra and Rb are not aryl groups.

Organic light emitting devices are described wherein the emissive layer comprises a host material containing a fluorescent or phosphorescent emissive molecule, which molecule is adapted to luminesce when a voltage is applied across the heterostructure, wherein an intersystem crossing molecule of optical absorption spectrum matched to the emission spectrum of the emissive molecule enhances emission efficiency.

Provision of a novel platinum complex which is useful as a material for a light-emitting device of good light emission characteristic and light emission efficiency, and a novel light-emitting material that may be utilized in various fields.

A platinum complex represented by the following general formula (1):

(in which two rings of ring A, ring B, ring C, and ring D represent nitrogen-containing heterocyclic rings which may have a substituent and the remaining two rings of them represent aryl rings or hetero aryl rings which may have a substituent, the ring A and the ring B, the ring A and the ring C or/and the ring B and the rind D may form condensed rings. Two of X¹, X², X³, and X⁴ represent nitrogen atoms coordination bonded to a platinum atom and the remaining two of them represent carbon atoms or nitrogen atoms. Q¹, Q², and Q³ each represents a bond, oxygen atom, sulfur atom or bivalent group, two of Z¹, Z², Z³, and Z⁴ represent coordination bonds, and the remaining two of them represent covalent bonds, oxygen atoms or sulfur atoms), and a light-emitting device containing the platinum complex.

An OLED device comprises an anode, a cathode and therebetween a light emitting layer containing a compound represented by Formula I below:

wherein: each A is independently selected from N and P; each E is independently selected from N, P, and As;

each Z is a radical independently selected from

each R is an independently selected substituent; and each R′ is independently selected from H and a substituent; provided that two substituent groups can join to form a ring.

An organic electroluminescent device including: an anode, a cathode, an emitting layer formed of an organic compound and interposed between the cathode and the anode, and two or more layers provided in a hole-injecting/hole-transporting region between the anode and the emitting layer; of the layers which are provided in the hole-injecting/hole-transporting region, a layer which is in contact with the emitting layer containing a compound represented by the formula (1); and of the layers which are provided in the hole-injecting/hole-transporting region, a layer which is interposed between the anode and the layer which is in contact with the emitting layer containing an amine derivative represented by the formula (2).

Provided are an organic electroluminescence device, which shows high luminous efficiency, is free of any pixel defect, and has a long lifetime, and a material for an organic electroluminescence device for realizing the device. The material for an organic electroluminescence device is a compound having a n-conjugated heteroacene skeleton crosslinked with a carbon atom, nitrogen atom, oxygen atom, or sulfur atom. The organic electroluminescence device has one or more organic thin film layers including a light emitting layer between a cathode and an anode, and at least one layer of the organic thin film layers contains the material for an organic electroluminescence device.

A semiconductor light emitting device comprising a light emitting layer disposed between an n-type region and a p-type region is combined with a ceramic layer which is disposed in a path of light emitted by the light emitting layer. The ceramic layer is composed of or includes a wavelength converting material such as a phosphor. Luminescent ceramic layers according to embodiments of the invention may be more robust and less sensitive to temperature than prior art phosphor layers. In addition, luminescent ceramics may exhibit less scattering and may therefore increase the conversion efficiency over prior art phosphor layers.