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Multi-component host material and an organic electroluminescence device comprising the same

a technology of organic electroluminescence and host material, which is applied in the direction of organic semiconductor devices, organic chemistry, indium organic compounds, etc., can solve the problems of not revealing an organic electroluminescent device, urgent issue in the development of an organic el device providing high efficiency and long li

Inactive Publication Date: 2017-05-04
ROHM & HAAS ELECTRONICS MATERIALS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention offers an organic electroluminescent device that is highly efficient and has a long lifespan. Additionally, it can be utilized to create display devices or lighting devices.

Problems solved by technology

Recently, the development of an organic EL device providing high efficiency and long lifespan is an urgent issue.
However, the references fail to disclose an organic electroluminescent device using a multi-component host comprising a biscarbazole derivative and a carbazole derivative including a nitrogen-containing heteroaryl.

Method used

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  • Multi-component host material and an organic electroluminescence device comprising the same
  • Multi-component host material and an organic electroluminescence device comprising the same
  • Multi-component host material and an organic electroluminescence device comprising the same

Examples

Experimental program
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Effect test

example 2-10

Device Preparation of an OLED Device by Co-Evaporating the First Host Compound and the Second Host Compound of the Present Invention

[0069]An OLED device was produced in the same manner as in Device Examples 1-1 to 1-6, except for forming the second hole injection layer of 3 nm; forming the first hole transport layer of 40 nm; not forming the second hole transport layer; doping compound D-136 as the dopant of the light-emitting layer in a doping amount of 15 wt % based on the total amount of the host and dopant; forming the electron transport layer of 35 nm by evaporating 2,4-bis(9,9-dimethyl-9H-fluoren-2-yl)-6-(naphthalen-2-yl)-1,3,5-triazine and lithium quinolate at a rate of 4:6; and using other combinations for the first host compound and the second host compound used in the host of the light-emitting layer.

Device Examples 3-1 to 3-3: Preparation of an OLED Device by Co-Evaporating the First Host Compound and the Second Host Compound of the Present Invention

[0070]An OLED device ...

example 3-4

Device Preparation of an OLED Device by Co-Evaporating the First Host Compound and the Second Host Compound of the Present Invention

[0071]An OLED device was produced in the same manner as in Device Examples 2-1 to 2-7, except for forming the first hole injection layer of 10 nm; forming the second hole transport layer of 30 nm using compound HT-3; using compound D-168 as the dopant of the light-emitting layer; and using other combinations for the first host compound and the second host compound used in the host of the light-emitting layer.

Comparative Examples 2-1 to 2-3: Preparation of an OLED Device Using Only the First Host Compound as a Host

[0072]An OLED device was produced in the same manner as in Device Examples 2-1 to 2-7, except for using only the first host compound as a host of the light-emitting layer.

Comparative Examples 3-1 to 3-3: Preparation of an OLED Device Using Only the Second Host Compound as a Host

[0073]An OLED device was produced in the same manner as in Device ...

example 4-1

Device Preparation of an OLED Device by Co-Evaporating the First Host Compound and the Second Host Compound of the Present Invention

[0078]An OLED device was produced in the same manner as in Device Examples 1-1 to 1-6, except for using compound HT-4 for the second hole transport layer, and using the compounds as listed in Table 3 below for the first host compound and the second host compound used in the host of the light-emitting layer.

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Abstract

The present invention relates to a multi-component host material and an organic electroluminescent device comprising the same. By comprising a specific combination of the multi-component host compounds, the organic electroluminescent device according to the present invention can provide high luminous efficiency and excellent lifespan characteristics.

Description

TECHNICAL FIELD[0001]The present invention relates to a multi-component host material and an organic electroluminescence device comprising the same.BACKGROUND ART[0002]An electroluminescence device (EL device) is a self-light-emitting device which has advantages in that it provides a wider viewing angle, a greater contrast ratio, and a faster response time. An organic EL device was first developed by Eastman Kodak, by using small aromatic diamine molecules, and aluminum complexes as materials for forming a light-emitting layer [Appl. Phys. Lett. 51, 913, 1987].[0003]An organic EL device (OLED) is a device changing electronic energy to light by applying electricity to an organic electroluminescent material, and generally has a structure comprising an anode, a cathode, and an organic layer between the anode and the cathode. The organic layer of an organic EL device may be comprised of a hole injection layer, a hole transport layer, an electron blocking layer, a light-emitting layer (w...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H01L51/00C09K11/06C09K11/02H10K99/00
CPCH01L51/0072C09K11/025C09K11/06H01L51/0085H01L51/0052H01L51/0094H01L51/0067H01L51/0071H01L51/0074H01L51/0073H01L2251/5384H01L51/5016C07D401/14C07D405/14C07F15/0033C07D401/04C07D401/10C07D409/14C07D487/04C07D491/04C07D495/04C07D209/86C07D209/88C09K2211/1007C09K2211/1029C09K2211/185H10K85/636H10K85/654H10K85/6576H10K85/6574H10K85/342H10K85/40H10K85/6572H10K50/156H10K2101/10H10K2101/90H10K50/12H10K85/615H10K85/657H10K50/11C09K2211/1088
Inventor AHN, HEE-CHOONKIM, YOUNG-KWANGLEE, SU-HYUNJUN, JI-SONGLEE, SEON-WOOKIM, CHI-SIKPARK, KYOUNG-JINKIM, NAM-KYUNCHOI, KYUNG-HOONSHIM, JAE-HOONCHO, YOUNG-JUNLEE, KYUNG-JOO
Owner ROHM & HAAS ELECTRONICS MATERIALS LLC