An organic compound having a naphtho fluoranthene core and a hetero aromatic group bonded to a specific position of the naphtho fluoranthene core, an organic light-emitting diode and an organic light-emitting device including the compound are disclosed. Since the organic compound has a narrow Stokes Shift between an absorption wavelength and an emission wavelength, the organic compound has a broad overlapped area between its absorption peak and an emission peak of a delayed fluorescent material, and therefore it can emit blue light with high color purity. It is possible to manufacture an organic light-emitting diode (OLED) and an organic light-emitting device that enhance luminous efficiency and color purity using the organic compound.

The present invention is to provide a light emitting material, for an organic EL device, exhibiting higher light emitting efficiency, and particularly, to provide a blue light emitting material, wherein the light emitting material comprises a compound of the following General Formula (1):

##STR00001## X is an aryl group including a tertiary amine structure, and Y is a phenyl group having an alkyl or aryl substituent at one ortho position.

The present invention is to provide a light emitting material, for an organic EL device, exhibiting higher light emitting efficiency, and particularly, to provide a blue light emitting material, wherein the light emitting material comprises a compound of the following General Formula (1):

##STR00001## X is an aryl group including a tertiary amine structure, and Y is a phenyl group having an alkyl or aryl substituent at one ortho position.

The present invention relates to a composition, comprising a palladium compound which is a palladium salt or a palladium complex or a mixture thereof, and a polycyclic compound of Formula (I), (II) or (III):

The present application relates to an amine compound, which is suitable for use in electronic devices, in particular organic electroluminescent devices (OLEDs). Furthermore, it relates to electronic devices comprising the compound, in particular OLEDs. Furthermore, it relates to a method for synthesizing the above-mentioned amine compound.

The present application relates to an amine compound, which is suitable for use in electronic devices, in particular organic electroluminescent devices (OLEDs). Furthermore, it relates to electronic devices comprising the compound, in particular OLEDs. Furthermore, it relates to a method for synthesizing the above-mentioned amine compound.

A method of preparing a thermally activated delayed fluorescent material is disclosed. The method includes steps of adding a catalyst, an alkaline substance, and a solvent into a first reactant, i.e. a bromide of cyclopenta[def]fluorene-4,8-dione, and a second reactant, where a substitution reaction occurs so as to obtain a reaction solution, and removing an impurity from the reaction solution to obtain the thermally activated delayed fluorescent

##STR00001##

material, having a structural formula of: . By using the cyclopenta[def]fluorene-4,8-dione as acceptor units, the triplet state energy level of the acceptor units is reduced, and the property of the intramolecular charge transfer state is enhanced, so that the light-emitting molecules are redshifted.

A method of preparing a thermally activated delayed fluorescent material is disclosed. The method includes steps of adding a catalyst, an alkaline substance, and a solvent into a first reactant, i.e. a bromide of cyclopenta[def]fluorene-4,8-dione, and a second reactant, where a substitution reaction occurs so as to obtain a reaction solution, and removing an impurity from the reaction solution to obtain the thermally activated delayed fluorescent

##STR00001##

material, having a structural formula of: . By using the cyclopenta[def]fluorene-4,8-dione as acceptor units, the triplet state energy level of the acceptor units is reduced, and the property of the intramolecular charge transfer state is enhanced, so that the light-emitting molecules are redshifted.

Disclosed are a polymer, and a mixture or a formulation and an organic electronic device containing same, and applications thereof, and further a monomer of which the polymer is made; the polymer comprises on its side chain a repeating structure unit E, characterizing in that its (S1(E)−T1(E))≦0.35 eV or even less, which may allow the said polymer having thermally activated delayed fluorescence (TADF) property. Thus a TADF polymer suitable for printing processes is provided, thereby reducing OLED manufacturing costs.

Provided are an arylamine compound and an organic light-emitting device including the same.