The present application provides a hetero-cyclic compound capable of significantly enhancing lifetime, efficiency, electrochemical stability and thermal stability of an organic light emitting device, and an organic light emitting device comprising the hetero-cyclic compound in an organic material layer.

Provided is an organic light emitting device, including a first electrode, second electrode, and first and second emitting layers that are disposed between first and second electrodes. The first emitting layer is located on a side of the second emitting layer close to the first electrode. The first emitting layer includes a first host material and first dopant material. The second emitting layer includes a second host material different from the first host material, and second dopant material. An electron block layer disposed between first emitting layer and first electrode, first emitting layer and second emitting layer satisfy:

|HOMO.sub.EBL<|HOMO.sub.EML1|<HOMO.sub.EML2|,

|HOMO.sub.EML1−HOMO.sub.EBL|=0.2 eV to 0.4 eV,

where HOMO.sub.EBL is a HOMO energy level of the electron block layer, HOMO.sub.EML1 is a HOMO energy level of the first emitting layer, HOMO.sub.EML2 is a HOMO energy level of the second emitting layer.

A light-emitting device, comprising: a first electrode and a second electrode arranged in a stacked manner; and multiple functional layers provided between the first electrode and the second electrode. The multiple functional layers comprise a light-emitting layer, at least two material layers having a hole transport function between the light-emitting layer and the first electrode, and at least one material layer having an electron transport function between the light-emitting layer and the second electrode. The at least two material layers having the hole transport function comprise an electron blocking layer, and the material of the light-emitting layer comprises a guest material. The difference between the LUMO energy level of the material of the electron blocking layer and the LUMO energy level of a host material is greater than or equal to a threshold. Under the same test condition, the ratio of the magnitude of the value of a hole mobility of the material of the electron blocking layer to the magnitude of the value of an electron mobility of the material of the at least one material layer having the electron transport function is greater than or equal to 1.

The present disclosure belongs to the technical field of organic materials, and specifically disclosed are a nitrogen-containing compound, and an electronic element and electronic apparatus using the same, the nitrogen-containing compound having a structure represented by a formula F-1. When the compound of the present disclosure is used as an electron blocking layer for manufacturing an organic electroluminescent device, the service life of the organic electroluminescent device may be effectively prolonged, and the luminous efficiency or driving voltage may be improved to a certain extent.

##STR00001##

A display device includes a hole transport layer common to a plurality of light-emitting elements between a light-emitting layer and an anode electrode below thereof in the light-emitting element in each pixel. The hole transport layer includes a hole transport section that transports positive holes to the light-emitting layer, and an adjacent pixel hole blocking section that is formed in a portion between the light-emitting elements in adjacent pixels and blocks transportation of positive holes between the light-emitting elements in adjacent pixels.

The present application relates to compounds of formula (I) and (II), to processes for preparation thereof, and to the use thereof in electronic devices.

The present application relates to an organic compound, and an electronic component and electronic device having the same, and belongs to the technical field of organic electroluminescence. The organic compound of the present application has a structure shown in formula 1. When used in an electronic component, the organic compound of the present application can significantly improve the performance of the electronic component.

##STR00001##

It is an object of the present invention to provide a composition for light emitting diodes with which it is possible to obtain an organic EL element that includes an organic layer formed using a high molecular weight material and whose service life can be extended as compared with that of conventional organic EL elements. The present invention provides a composition for light emitting diodes containing a high molecular weight compound and a thermally crosslinkable low molecular weight compound, wherein the thermally crosslinkable low molecular weight compound includes a compound that has two or more thermally crosslinkable structures in a molecule. The thermally crosslinkable low molecular weight compound preferably includes a compound that contains two or more thermally crosslinkable structures selected from the group consisting of an acrylate structure, a methacrylate structure, and a maleimide structure in a molecule.

The present specification relates to a heterocyclic compound represented by Chemical Formula 1, and an organic light emitting device comprising the same.

The present specification relates to a compound represented by Chemical Formula 1, and an organic light emitting device including the same.