The present invention relates to a compound and an organic light-emitting device containing the compound. The compound has a structure as shown in Formula (1), where X is selected from the group consisting of: O, S, Se, CR.sub.3R.sub.4, SiR.sub.5R.sub.6, GeR.sub.7R.sub.8 and BR.sub.9. The compound can be used in organic light-emitting devices, particularly as a host material or a hole blocking layer material in an emitting layer of a device or both as the host material and hole blocking layer material simultaneously. Moreover, the compound can provide a higher luminous efficiency for a device, especially has the advantages such as a longer service life of a device, and has the possibility to be applied to the AMOLED industry.

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An organic electroluminescent element has at least one pair of electrodes including an anode and a cathode and one or more organic functional layers between the anode and the cathode that are in a pair. The organic electroluminescent element includes an organic functional layer that exists as a continuous phase over an entire display area and includes an at least one light emitting compound with a concentration gradient in an in-plane direction and in a thickness direction of the organic functional layer.

The present application provides a heterocyclic compound, and an organic light emitting device containing the heterocyclic compound in an organic material layer.

The present specification provides a heterocyclic compound represented by Chemical Formula 1, an organic light emitting device comprising the same, a composition for an organic material layer of an organic light emitting device, and a method for manufacturing an organic light emitting device.

The present invention relates to a composition comprising a compound of formula (H1) and a compound of formula (H2). The present invention furthermore relates to a formulation comprising a composition comprising a compound of formula (H1) and a formula (H2) and a solvent. Finally, the present invention relates to an electronic device comprising a such a composition.

The present application relates to materials for use in electronic devices, to processes for preparing the materials, and to electronic devices containing the materials.

An organic electroluminescent device and a display apparatus. The organic electroluminescent device includes a first electrode, a second electrode and an organic layer disposed between the first electrode and the second electrode, where the organic layer includes an emission layer (EML), the EML includes a host material, a thermally activated delayed fluorescence (TADF) sensitizer and a fluorescent dye, and the fluorescent dye is selected from a compound represented by Formula (1).

The present invention relates to an organic light emitting diode comprising a substrate, an anode, a cathode, an emission layer, an electron injection layer and an electron transport layer stack; and to a display device or lighting device comprising the same.

Provided are a heterocyclic compound represented by Formula 1, an organic light-emitting device including the same, and an electronic apparatus including the organic light-emitting device.

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The detailed description of Formula 1 is the same as described in the present specification.

A light emitting element includes a first electrode, a second electrode, and at least one functional layer which is disposed between the first electrode and the second electrode and includes a compound represented by Formula 1 below, thereby exhibiting high efficiency characteristics. The compound of Formula 1 may be included in the emission layer of the light emitting element as a dopant.

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