Organic electroluminescent compounds and organic electroluminescent device comprising the same

A compound and luminescent technology, which is applied in organic chemistry, luminescent materials, chemical instruments and methods, etc., can solve the problem of low glass transition temperature, short service life of organic EL devices, inability to provide power efficiency, luminous efficiency, quantum efficiency and lifetime organic EL device and other issues, to improve the current characteristics, enhance the effect of power efficiency

Inactive Publication Date: 2015-12-23
ROHM & HAAS ELECTRONICS MATERIALS LLC
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  • Abstract
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Problems solved by technology

[0005] Although these phosphorescent host materials provide good emission characteristics, they have the following disadvantages: (1) Due to their low glass transition temperature and poor thermal stability, their degradation can occur during high temperature deposition processes in vacuum
Therefore, there is no advantage regarding power efficiency (1m / W)
(3) In addition, the lifetime of organic EL devices is short, and improvement in luminous efficiency is still required
However, the compounds of the above references cannot provide organic EL devices with satisfactory power efficiency, luminous efficiency, quantum efficiency and lifetime

Method used

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  • Organic electroluminescent compounds and organic electroluminescent device comprising the same
  • Organic electroluminescent compounds and organic electroluminescent device comprising the same
  • Organic electroluminescent compounds and organic electroluminescent device comprising the same

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example 1

[0097] Example 1: Preparation of Compound C-98

[0098] Preparation of compound C-98-3

[0099]

[0100] 127 g (0.60 mol) of 4-dibenzofuran boronic acid (compound C-98-1), 100 g (0.50 mol) of 2-bromo-nitrobenzene, and 159 g of potassium carbonate ( 1.50mol) and tetrakis (triphenylphosphine) palladium [Pd (PPh 3 ) 4 ] 29 g (0.03 mol), the mixture was stirred under reflux for one day. The mixture was extracted with ethyl acetate 2L. The obtained organic layer was washed with 500 mL of distilled water, dried over anhydrous magnesium sulfate, and then the organic solvent was removed under reduced pressure. The obtained solid was separated by silica gel column chromatography and recrystallization to obtain compound C-98-3 (126 g, 87%).

[0101] Preparation of Compound C-98-4

[0102]

[0103] 4-(2-nitrophenyl) dibenzo [b, d] furan (compound C-98-3) 126g (0.44mol) was dissolved in triethyl phosphite [P (OTe) 3 ] 1.1 L, and then the mixture was stirred at 150 °C und...

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Abstract

The present invention relates to a novel organic electroluminescent compound and an organic electroluminescent device comprising the same. The organic electroluminescent compound of the present invention can be used for a light-emitting layer or a hole transport layer, and has excellent luminous characteristics to provide an organic electroluminescent device showing improved current characteristics.

Description

technical field [0001] The present invention relates to an organic electroluminescent compound and an organic electroluminescent device comprising the compound. Background technique [0002] An electroluminescent (EL) device is a self-luminous device that is advantageous in that it provides a wider viewing angle, a greater contrast ratio, and a faster response time. Organic EL devices were originally developed by Eastman Kodak by using small aromatic diamine molecules and aluminum complexes as materials for forming light-emitting layers [Appl. Phys. Lett. 51, 913 , 1987]. [0003] The most important factor determining the luminous efficiency in an organic EL device is the luminescent material. Hitherto, fluorescent materials have been widely used as light-emitting materials. However, in view of the mechanism of electroluminescence, phosphorescent light-emitting materials have been extensively studied because phosphorescent materials theoretically enhance luminous efficien...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D209/94C07D209/96C07D405/12C07D487/10C07D491/107H01L27/32H01L51/54C09K11/06
CPCC07D405/12C07D487/10C07D491/107C07D209/96C09K11/06C09K2211/1007C09K2211/1011C09K2211/1014C09K2211/1029C09K2211/1088C09K2211/1092C07D495/10H10K85/657H10K50/11C07D491/04C07D495/04H10K85/653H10K85/655H10K85/631H10K85/654
Inventor K-J·李C-S·金H-C·安D-H·文Y-J·曹T-J·李
Owner ROHM & HAAS ELECTRONICS MATERIALS LLC
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