Samsung Display Co., Ltd.

Junta Fuchiwaki

Hiroaki Itoi

Masatsugu Ueno

Ichinori Takada

Naoya Sakamoto

Nobutaka Akashi

Hideo Miyake

Xiulan Jin

Koushin Matsuoka

Asami Sakamoto

Yasuo Miyata

Hiromi Nakano

Hiromi Oyama

Shuri Sato

Ichiro Imada

Ikuo Sasaki

Tohru Sato

An organic electroluminescence device including a first electrode, a hole transport region on the first electrode, an emission layer on the hole transport region, an electron transport region on the emission layer, and a second electrode on the electron transport region, wherein the hole transport region includes a first heterocyclic compound including 1 to 3 structures derived from a compound represented by Formula 1 below, and the emission layer includes a second heterocyclic compound including 1 or 2 structures derived from a compound represented by Formula 1.

Organic electroluminescence device

A light emission material includes a first compound satisfying Equation 1:2≥0.11.  Equation 1In Equation 1, K1 is a sum of radiationless transition rate due to internal conversion from a certain specific n-th triplet excitation state to a lower order triplet excitation state including the lowest triplet excitation state, K2 is a reverse intersystem crossing transition rate from the certain specific n-th triplet excitation state to a singlet excitation state which is adjacent to the n-th triplet excitation state, and n is an integer of 2 or more. An organic electroluminescence device including the light emission material may simultaneously attain high emission efficiency and roll-off reduction.

Light emission material and organic electroluminescence device including the same

A polycyclic compound is represented by Formula 1: where X, Rto R, L, L, and nto nare further defined. An organic electroluminescence device includes the polycyclic compound.

Polycyclic compound and organic electroluminescence device including the same

A material for an organic electroluminescent device having high emission efficiency and long life and an organic electroluminescent device including the same. The material for an organic electroluminescent device is represented by the following Formula 1. 

Material for organic electroluminescent device and organic electroluminescent device including the same

A polycyclic compound may be represented by Formula 1 below. The polycyclic compound may improve the light emitting efficiency of a blue light emitting region, and an organic electroluminescence device including the polycyclic compound may have improved blue light emission, high external quantum efficiency, and long life. The polycyclic compound may be used as a thermally activated delayed fluorescence material, which emits blue light, to improve the blue light emitting efficiency of the organic electroluminescence device. 

A polycyclic compound and an organic electroluminescence device, the polycyclic compound being represented by Formula 1: 

A heterocyclic compound and an organic electroluminescence device including the same, the heterocyclic compound being represented by Formula 1: 

Heterocyclic compound and organic electroluminescence device including the same

An amine derivative represented by the following General Formula (1) is provided.  In the above General Formula (1), Ar, Arand Arare independently a substituted or unsubstituted aryl group or a substituted or unsubstituted heteroaryl group, at least one of Ar, Arand Aris substituted with a substituted or unsubstituted silyl group, and L is a single bond, a substituted or unsubstituted arylene group, or a substituted or unsubstituted heteroarylene group.

Organic electroluminescent device

A polycyclic compound is represented by Formula 1, where X, X, L, Rto R, and a to d are as defined in the specification.

A polycyclic compound and an organic electroluminescence device, the polycyclic compound being represented by the following Formula 1: 

A material for an organic electroluminescent device, represented by Formula 1, and an organic electroluminescent device including the same. The material for an organic electroluminescent device according to an embodiment of the present disclosure may be a triamine derivative in which the nitrogen atoms are connected (e.g., coupled) via the meta ring positions of Land Llinkers, which may be represented by Formula 2. 

An organic electroluminescent device includes: a substrate; a first electrode on the substrate; a second electrode on the first electrode; and a plurality of lamination layers between the first and second electrodes; wherein at least one of the plurality of lamination layers includes a carbazole compound represented by Formula 1:  The carbazole compound may improve the emission efficiency of the organic electroluminescent device.

Carbazole compound, material for organic electroluminescent device, and organic electroluminescent device

A material for an organic electroluminescent device having high emission efficiency is represented by following Formula 1: The material represented by Formula 1 may be included in at least one layer selected from a plurality of layers between an anode and an emission layer of an organic EL device.

Material for organic electroluminescent device and organic electroluminescent device comprising same

A material for an organic electroluminescent device having high emission efficiency and an organic electroluminescent device utilizing the same. The material is represented by Formula 1.  In Formula 1, Xto Xare each independently hydrogen, deuterium, a halogen atom, an alkyl group having 1 to 15 carbon atoms, or a substituted or unsubstituted aryl group; Arand Arare each independently a substituted or unsubstituted aryl group having 6 to 12 carbon atoms for forming a ring; L is a substituted or unsubstituted arylene group; n is an integer from 1 to 3; at least one L is a phenylene group represented by Formula 2.  In Formula 2, Yto Yare each independently a direct linkage, hydrogen, deuterium, halogen, an alkyl group having 1 to 15 carbon atoms, an alkenyl group having 2 to 15 carbon atoms, or a substituted or unsubstituted aryl group.

Material for organic electroluminescent device and organic electroluminescent device using the same

A material for an organic electroluminescent device and an organic electroluminescent device including the same, according to one or more embodiments of the present disclosure, include an amine derivative represented by Formula 1. When the amine derivative represented by Formula 1 is included in the emission layer, the emission efficiency of the organic electroluminescent device may be improved. 

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Yokohama, Japan

Junta Fuchiwaki