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Organic electroluminescent compound and application thereof

An electroluminescence and compound technology, applied in the field of organic electroluminescence compounds, can solve the problems of easy crystallization or agglomeration, reduce device efficiency, reduce device life, etc. Effect

Pending Publication Date: 2022-08-09
EVERDISPLAY OPTRONICS (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Materials with low Tg temperature have poor thermal stability and are easy to crystallize or agglomerate, which will greatly reduce the life of the device and seriously reduce the efficiency of the device

Method used

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  • Organic electroluminescent compound and application thereof
  • Organic electroluminescent compound and application thereof
  • Organic electroluminescent compound and application thereof

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Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0040]

[0041] To the reaction flask were added Intermediate A (10 mmol), carbazole derivative (20 mmol), Pd 2 (dba) 3(0.2mmol), tri-tert-butylphosphine (0.2mmol), sodium tert-butoxide (22mmol), toluene (100ml), turn on the heating by evacuating nitrogen three times, until the temperature of the reaction solution reaches 95-105°C, keep this temperature and react for 20h , Sampling TLC and HPLC, the reaction of the raw materials is complete. The heating was stopped, cooled to room temperature, filtered with suction, the filtrate was separated into the organic layer, the aqueous layer was extracted with ethyl acetate, the organic layers were combined, dried over anhydrous magnesium sulfate, filtered with suction, the filtrate was concentrated and subjected to column chromatography (silica gel, from pure 35 :1PE / CH 2 Cl 2 to 5:1PE / CH 2 Cl 2 gradient elution) to give compound 2.

[0042] Further purification using reverse phase column chromatography with acetonitrile as ...

preparation Embodiment 2

[0044]

[0045] To the reaction flask were added Intermediate A (10 mmol), carbazole derivative (20 mmol), Pd 2 (dba) 3 (0.2mmol), tri-tert-butylphosphine (0.2mmol), sodium tert-butoxide (22mmol), toluene (100ml), turn on the heating by pumping out nitrogen three times, until the temperature of the reaction solution reaches 95-105°C, keep this temperature and react for 23h , Sampling TLC and HPLC, the reaction of the raw materials is complete. The heating was stopped, cooled to room temperature, filtered with suction, the organic layer was separated from the filtrate, the aqueous layer was extracted with ethyl acetate, the organic layers were combined, dried over anhydrous magnesium sulfate, filtered with suction, the filtrate was concentrated and subjected to column chromatography (silica gel, from pure 30 :1PE / CH 2 Cl 2 to 5:1PE / CH 2 Cl 2 gradient elution) to give compound 6.

[0046] Further purification using reverse phase column chromatography with acetonitrile a...

preparation Embodiment 3

[0048]

[0049] To the reaction flask were added Intermediate A (10 mmol), carbazole derivative (20 mmol), Pd 2 (dba) 3 (0.2mmol), tri-tert-butylphosphine (0.2mmol), sodium tert-butoxide (22mmol), toluene (100ml), turn on the heating by pumping out nitrogen three times, until the temperature of the reaction solution reaches 95-105°C, keep this temperature and react for 18h , Sampling TLC and HPLC, the reaction of the raw materials is complete. The heating was stopped, cooled to room temperature, filtered with suction, the organic layer was separated from the filtrate, the aqueous layer was extracted with ethyl acetate, the organic layers were combined, dried over anhydrous magnesium sulfate, filtered with suction, the filtrate was concentrated and subjected to column chromatography (silica gel, from pure 30 :1PE / CH 2 Cl 2 to 5:1PE / CH 2 Cl 2 gradient elution) to give compound 14.

[0050] Further purification using reverse phase column chromatography with acetonitrile ...

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Abstract

The invention provides an organic electroluminescent compound and application thereof, the organic electroluminescent compound has a structure as shown in a formula I. The compound has better thermal stability, and can improve the current efficiency and prolong the service life of an organic electroluminescent device. The compound provided by the invention has a good application effect in OLED devices, and has a good industrialization prospect.

Description

technical field [0001] The invention belongs to the technical field of semiconductors, and relates to an organic electroluminescent compound and its application. Background technique [0002] Organic Electroluminescence (OLED, Organic Light Emission Diodes) device technology features self-luminescence, wide viewing angle, low energy consumption, high efficiency, thinness, rich colors, fast response speed, wide temperature range, low driving voltage, flexible and bendable With the unique advantages of transparent display panel and environmental friendliness, the application prospect is very broad. It generally consists of two opposing electrodes and at least one layer of an organic light-emitting compound interposed between the two electrodes. Charges are injected into the organic layer formed between the anode and cathode to form electron and hole pairs, resulting in light emission from organic compounds with fluorescent or phosphorescent properties. [0003] Phosphorescen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D491/153C07D411/04C09K11/06H01L51/54
CPCC07D491/153C07D411/04C09K11/06C09K2211/1029C09K2211/1096C09K2211/1033H10K85/6572H10K85/657Y02E10/549
Inventor 田帅
Owner EVERDISPLAY OPTRONICS (SHANGHAI) CO LTD
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