A composition comprising a first compound capable of functioning as a phosphorescent emitter in an organic light emitting device at room temperature is provided. The first compound includes at least one substituent R, where each of the at least one substituent R has the formula of: - - -G.sup.1-G.sup.2, where the dashed line denotes the bond through which R is attached in the first compound; G.sup.1 is a non-aromatic cyclic or polycyclic group; G.sup.2 is selected from aryl and heteroaryl; and G.sup.1 and G.sup.2 are independently, optionally further substituted with a substituent selected from the group consisting of hydrogen, deuterium, halide, alkyl, cycloalkyl, heteroalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carbonyl, carboxylic acids, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof. Organic light emitting devices, consumer products, and formulations containing the first compound are also provided.

The present invention relates to a novel organic compound, and an organic electroluminescent element having improved characteristics, such as luminous efficiency, driving voltage, and lifespan, by containing the novel organic compound in one or more organic material layers.

To provide a light-emitting material containing a compound having a high excitation triplet level, particularly a host material of a light emitting layer, as a material for an organic electroluminescent device with high efficiency, and also to provide an organic electroluminescent device with high efficiency and high luminance by using the material. A light-emitting material containing a compound having a carbazole ring structure represented by the following general formula (1), and an organic electroluminescent device containing a pair of electrodes and one layer or plural layers including at least a light emitting layer intervening between the electrodes, the light emitting layer containing as a constitutional material thereof the light-emitting material.

##STR00001##

A thin film transistor array substrate includes a thin film transistor including a first gate electrode, an active layer, a source electrode, and a drain electrode. A first conductive layer pattern is on a same layer as the source electrode and the drain electrode and formed of a same material as the source electrode and the drain electrode. An insulating layer is on the first conductive layer pattern and has an opening exposing a patterning cross-section of the first conductive layer pattern. A pixel electrode is on the insulating layer and is coupled to the source electrode or the drain electrode through a contact hole passing through the insulating layer. A diffusion prevention layer covers the patterning cross-section of the first conductive layer pattern and inclined side surfaces of the insulating layer exposed through the opening.

There is provided an ink composition for an organic light-emitting device which can easily form a light-emitting layer having more excellent uniformity and which is suitable for forming a light-emitting layer by a wet method. The ink composition includes a light-emitting material, a binder resin, and a solvent, the binder resin containing a multi-branched copolymer of a monovinyl compound composed of a styrene-based monomer as an essential component with a multifunctional vinyl compound containing two or more ethylenically unsaturated double bonds, and the copolymer having a weight-average absolute molecular weight within a range of 200,000 to 800,000 determined by gel permeation chromatography using a multi-angle laser light scattering detector and a degree of branching within a range of 0.20 to 0.55 determined from an inertial radius. An organic light-emitting device includes a positive electrode; a light-emitting layer, and a negative electrode, the light-emitting layer containing the binder resin.

Provided is a novel compound for EBL capable of improving the light emitting efficiency, stability and life span of a device, and an organic electric element and an electronic device using the same.

An organic electroluminescent device having high luminous efficiency, low driving voltage, and particularly a long lifetime is provided by combining various materials for an organic electroluminescent device, which have excellent hole and electron injection/transport performances, electron blocking ability, stability in a thin-film state, and durability as materials for an organic electroluminescent device having high luminous efficiency and high durability so as to allow the respective materials to effectively reveal their characteristics. In the organic electroluminescent device having at least an anode, a hole transport layer, a light emitting layer, an electron transport layer and a cathode in this order, the hole transport layer includes an arylamine compound represented by the following general formula (1), and the light emitting layer includes an amine derivative of the following general formula (2) having a condensed ring structure.

##STR00001##

A compound for an organic optoelectronic device represented by Chemical Formula 1 and an organic optoelectronic device including the same are provided.

##STR00001##

In Chemical Formula 1, R1 to R5 are independently hydrogen, deuterium, NH2, a substituted or unsubstituted C1 to C30 alkylamine group, a substituted or unsubstituted C6 to C30 arylamine group, a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C2 to C30 heteroaryl group, or a combination thereof, at least one of R2, R4, and R5 is a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C6 to C30 arylamine group, or a substituted or unsubstituted C2 to C30 heteroaryl group, each of a, c, d, e, and f is an integer of 1 to 4, and b is an integer of 1 or 2.

Organic light emitting materials and devices comprising phosphorescent metal complexes comprising ligands comprising aryl or heteroaryl groups substituted at both ortho positions are described. An organic light emitting device, comprising: an anode, a hole transport layer; an organic emissive layer comprising an emissive layer host and an emissive dopant; an electron impeding layer, and electron transport layer, and a cathode disposed, in that order, over a substrate.

A display substrate and a manufacturing method therefor, and a display device. The display substrate comprises a display structure layer (100), a packaging structure layer (200) provided on the display structure layer (100), and a color film structure layer (300) provided on the side of the packaging structure layer (200) farthest from the display structure layer, wherein the packaging structure layer (200) at least comprises a light extraction structure (43) used for improving the light emitting efficiency.