Abstract: An organic light emitting device and a display apparatus are provided. The organic light emitting device includes an anode, a cathode and a light-emitting layer arranged between the anode and the cathode, wherein a first hole injection layer and a second hole injection layer are arranged between the anode and the light-emitting layer. The first hole injection layer and the second hole injection layer are different in structure, including one or more of the following: the first hole injection layer and the second hole injection layer are different in thickness, different in material structure, different in quantity of the material and number of types of the material, and different in energy level of the material.

Abstract: A light emitting device having excellent light emission efficiency contains a cathode, a first organic layer containing a compound having a cross-linkable group and a phosphorescent transition metal complex, a second organic layer containing a crosslinked body of the same compound as the compound having a cross-linkable group, and an anode in this order. The ratio of the compound having a cross-linkable group contained in the first organic layer is 2 to 10% by mass with respect to the total mass of the first organic layer. The compound having a cross-linkable group may be a compound having at least one cross-linkable group selected from cross-linkable groups represented by the formula (XL-1) to the formula (XL-19).

Abstract: A light emitting device including a first electrode and a second electrode each having a surface opposite the other, a light emitting layer disposed between the first electrode and the second electrode, and an electronic auxiliary layer disposed between the light emitting layer and the second electrode, wherein the electron auxiliary layer includes metal oxide nanoparticles and an orthosilicate compound.

Abstract: The present disclosure relates to an organic light emitting diode that includes at least one emitting material layer including an anthracene-based host and a boron-based dopant, at least one electron blocking layer including an amine-based compound substituted with at least one fused aromatic or hetero aromatic ring, and optionally at least one hole blocking layer including an azine-based compound or a benzimidazole-based compound. The organic light emitting diode has enhanced luminous efficiency as well as excellent luminous lifetime.

Abstract: A compound of Chemical Formula 1, and an organic light emitting device comprising the same.

Abstract: An organometallic compound represented by Formula 1: wherein, in Formula 1, R37 is hydrogen, deuterium, a substituted or unsubstituted C1-C60 alkyl group, a substituted or unsubstituted C3-C10 cycloalkyl group, a substituted or unsubstituted C2-C10 heterocycloalkyl group, a substituted or unsubstituted C6-C60 aryl group, a substituted or unsubstituted C2-C60 heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, or a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group; and ring CY1, R21 to R26, R30a, and R30b, are as described herein.

Abstract: A high-speed centrifugal compressor includes a shell, a stator, and a main shaft; a primary bearing pedestal and a secondary bearing pedestal which are used for supporting the main shaft are respectively mounted on inner sides of two ends of the shell; a thrust collar sleeves the main shaft between a primary diffuser and the primary bearing pedestal; one thrust air bearing is arranged on each of two sides of the thrust collar; a radial air bearing is arranged between each of the primary bearing pedestal and the secondary bearing pedestal and the main shaft; a sealing end cover is arranged between the primary worm wheel and the primary diffuser; several annular slots are arranged between the sealing end cover and the primary worm wheel; several annular slots are arranged between the secondary diffuser and the main shaft; and a backflow air cooling system is arranged in the shell.

Abstract: An organic electroluminescence device includes a first electrode, a second electrode facing the first electrode, and an emission layer between the first electrode and the second electrode, wherein the emission layer includes a first host, a first dopant, and a second dopant different from the first dopant, the first dopant and the second dopant are compounds each independently exhibiting thermally activated delayed fluorescence, the first dopant has a delayed fluorescence lifetime (?) value of about 2.6 ?s to about 5.0 ?s, and the first host, the first dopant, and the second dopant satisfy Equation 1 defined in the detailed description, thereby exhibiting increased efficiency and lifetime characteristics.

Abstract: Provided are compound represented by Formula 1, an organic electric element including a first electrode, a second electrode, and an organic material layer formed between the first electrode and the second electrode, and electronic device thereof, and by including the compound represented by Formula 1 in the organic material layer, the driving voltage of the organic electric element can be lowered, and the luminous efficiency and life time of the organic electric element can be improved.

Abstract: The present disclosure provides a compound of following formula and an organic light emitting device and an organic light emitting display device including the compound. The compound of the present disclosure serves as a host or a dopant in an emitting material layer.

Abstract: The swirl flow ceiling fan has four major elements. They are: a cylindrical diffuser, an inducer, a stationary enclosure and a safety disc. As the fan rotates, the ambient air is drawn in at the centre. The air which was drawn in by the inducer further gets energised within an enclosed space. The air's velocity gets increased. The charged air is pushed into the numerous spiral compartments of the revolving cylindrical diffuser. Then, finally, the cylindrical diffuser delivers the energised air in to the space. All the features collectively provide a very efficient swirl flow of the air with lesser noise levels and better comfort. It is also found to be cost-effective in its working as well in its manufacturing.

Abstract: Provided is a compound of Formula 1: wherein: Cy1 and Cy2 are each independently a substituted or unsubstituted hetero ring; R1 to R5 are the same as or different from each other, and are each independently hydrogen, deuterium, a halogen group, a cyano group, a nitro group, a hydroxyl group, a carbonyl group, an ester group, an imide group, an amino group, a silyl group, a boron group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclic group; n1 and n2 are each an integer from 0 to 4; n3 to n5 are each an integer from 0 to 3; and when n1 to n5 are each 2 or more, two or more substituents in the parenthesis are the same as or different from each other, and an organic light emitting device including the same.

Abstract: Provided are: a highly durable polymer having a high hole-injection/transport capacity; and a composition for an organic electroluminescent element, which contains the polymer.

Abstract: An organic light-emitting device includes a heterocyclic compound represented by Formula 1 as a thermally activated delayed fluorescence dopant, where D1 is a group represented by Formula 2 and Rw is selected from: —F, a cyano group, and a C1-C20 alkyl group substituted with at least one —F:

Abstract: The embodiments provide a fluorescent rare earth complex having strong emission intensity and excellent durability, and also provide a security medium using the complex. The rare earth complex according to the embodiment comprises a rare earth ion, a diphosphine dioxide ligand and a ?-diketone ligand wherein two phosphorus atoms contained in the diphosphine dioxide ligand individually have substituents different from each other.

Abstract: A gas turbine engine is provided. The gas turbine engine includes: a turbomachine; a fan including a plurality of fan blades rotatably driven by the turbomachine; a nacelle surrounding at least in part the plurality of fan blades of the fan; and a clearance control system including a control ring positioned at least partially within the nacelle, coupled to the nacelle, or both for control of a clearance gap between the plurality of fan blades and the nacelle.

Abstract: An organic EL device includes an anode, a cathode, and an emitting layer. The emitting layer contains a first compound represented by a formula (1X) or a formula (1Y), a second compound, and a third compound that exhibits delayed fluorescence. The second compound is different in structure from the first compound. The second compound is different in structure from the third compound. Singlet energies S1 of the first, second, third compounds satisfy Numerical Formula 1 and Numerical Formula 2 below, A is, for example, a group represented by a formula (a1); Y11˜Y13 are, for example, each independently a nitrogen atom or CRy; Ry is, for example, a substituent or a group represented by a formula (1Z); R1X to R3X are, for example, each independently a substituent or a group represented by a formula (1Z).

Abstract: To provide a light-emitting element with an improved reliability, a light-emitting element with a high current efficiency (or a high quantum efficiency), and a novel dibenzo[f,h]quinoxaline derivative that is favorably used in a light-emitting element which is one embodiment of the present invention. A light-emitting element includes an EL layer between an anode and a cathode. The EL layer includes a light-emitting layer; the light-emitting layer contains a first organic compound having an electron-transport property and a hole-transport property, a second organic compound having a hole-transport property, and a light-emitting substance; the combination of the first organic compound and the second organic compound forms an exciplex; the HOMO level of the first organic compound is lower than the HOMO level of the second organic compound; and a difference between the HOMO level of the first organic compound and the HOMO level of the second organic compound is less than or equal to 0.4 eV.

Abstract: A compound comprising a first ligand LA of Formula I, is disclosed. In the structure of Formula I, ring A is a 5-membered or 6-membered carbocyclic or heterocyclic ring, Z1-Z4 are each independently C or N; at least two consecutive Z1-Z4 are C, and are fused to a structure of Formula II or Formula III Y1 and Y2 are each independently O, S, Se, CRR?, SiRR?, or GeRR?; each RA, RB, RC, R, and R? is a hydrogen or a substituent; and any two substituents may be joined or fused together to form a ring. In the compound, LA is complexed to a metal M by the dashed lines in Formula I to form a five-membered chelate ring, and M has an atomic weight greater than 40. Organic light emitting devices and consumer products containing the compounds are also disclosed.

Abstract: The present invention is related to a first compound for an organic optoelectronic device represented by Chemical Formula 1, a composition for an organic optoelectronic device including the same, an organic optoelectronic device, and a display device. In Chemical Formula 1, definitions of each substituent are the same as defined in the specification.