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Organic electroluminescent compound and organic electroluminescent device comprising the same

A luminescent and compound technology, applied in the field of organic electroluminescent compounds, can solve the problems of reduced quantum efficiency, reduced device service life, quantum efficiency and service life deterioration, and achieves high luminous efficiency, long service life, and low drive. The effect of voltage

Active Publication Date: 2020-02-14
ROHM & HAAS ELECTRONICS MATERIALS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, OLEDs using these materials have problems in deteriorating quantum efficiency and lifetime
This is because when the OLED is driven at high current, thermal stress occurs between the anode and the hole injection layer, and said thermal stress significantly reduces the lifetime of the device
In addition, since the organic material used in the hole transport region has very high hole mobility, the hole-electron charge balance may be disrupted and the quantum efficiency (cd / A) may decrease

Method used

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

Examples

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Effect test

example 1

[0091] Example 1: Preparation of Compound C-4

[0092]

[0093] 10g of compound a-1 (31mmol), 11.2g of compound b-1 (31mmol), 1.42g of three (dibenzylideneacetone) dipalladium (0) (1.6mmol), 1.6mL of tri-tert-butyl Phosphine (3.1 mmol, 50% solution in toluene), 5.9 g of sodium tert-butoxide (62 mmol), and 154 mL of toluene were introduced into the reaction vessel, and the mixture was refluxed for 4 hours. The reaction solution was cooled to room temperature, and then the solvent was removed by a rotary evaporator. The residue was purified by column chromatography to obtain 8.3 g of Compound C-4 (yield: 44%).

example 2

[0094] Example 2: Preparation of Compound C-5

[0095]

[0096] 7.0g of compound a-1 (22mmol), 8.6g of compound b-2 (24mmol), 0.60g of three (dibenzylideneacetone) dipalladium (0) (0.66mmol), 0.6mL of tri-tert-butyl Phosphine (1.32 mmol, 50% solution in toluene), 3.1 g of sodium tert-butoxide (32 mmol), and 110 mL of toluene were introduced into the reaction vessel, and the mixture was refluxed for 2 hours. The reaction solution was cooled to room temperature, and then the solvent was removed by a rotary evaporator. The residue was purified by column chromatography to obtain 0.9 g of Compound C-5 (yield: 7%).

example 3

[0097] Example 3: Preparation of Compound C-6

[0098]

[0099] 7.4g of compound a-1 (23mmol), 10.0g of compound b-3 (23mmol), 1.0g of three (dibenzylideneacetone) dipalladium (0) (1.2mmol), 1.1mL of tri-tert-butyl Phosphine (2.3 mmol, 50% solution in toluene), 4.4 g of sodium tert-butoxide (46 mmol), and 114 mL of toluene were introduced into the reaction vessel, and the mixture was refluxed for 5 hours. The reaction solution was cooled to room temperature, and then the solvent was removed by a rotary evaporator. The residue was purified by column chromatography to obtain 4.9 g of Compound C-6 (yield: 31%).

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Abstract

The present disclosure relates to an organic electroluminescent compound and an organic electroluminescent device comprising the same. By using the organic electroluminescent compound of the present disclosure, an organic electroluminescent device having low driving voltage, high luminous efficiency, and / or long lifespan properties can be provided.

Description

technical field [0001] The present disclosure relates to an organic electroluminescent compound and an organic electroluminescent device comprising the same. Background technique [0002] Small-molecule green organic electroluminescent devices (OLEDs) were first developed by Tang et al. at Eastman Kodak in 1987 by using a TPD / Alq3 bilayer consisting of an emissive layer and a charge transport layer. Since then, the development of OLEDs has been rapidly affected and OLEDs have been commercialized. OLEDs convert electrical energy into light by applying electricity to an organic light-emitting material, and typically include an anode, a cathode, and an organic layer between the two electrodes. In order to improve the efficiency and stability of the OLED, it has a multilayer structure including a hole-transporting region, a light-emitting layer, an electron-transporting region, and the like. [0003] In the OLED, copper phthalocyanine (CuPc), 4,4'-bis[N-(1-naphthyl)-N-phenylam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C211/61H01L51/00H01L51/50C09K11/06
CPCC07C211/61C07D209/88C07D213/74C07D213/38C07D333/76C07D307/91C09K11/06C07C2603/18C07C2603/40C09K2211/1007C09K2211/1011C09K2211/1029C09K2211/1088C09K2211/1092C09K2211/1014H10K85/636H10K85/633H10K85/657H10K50/156H10K50/15H10K85/622H10K85/615H10K85/654H10K85/6572H10K85/6574H10K85/6576
Inventor 吴洪世李泰珍金荣光文斗铉林永默洪镇理
Owner ROHM & HAAS ELECTRONICS MATERIALS LLC
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