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Organic electroluminescent compound and application thereof

A luminescent and compound technology, applied in the field of organic electroluminescent compounds, can solve problems such as inability to meet the application requirements of luminescent materials, achieve excellent carrier transport performance, improve luminous efficiency, and prolong working life.

Pending Publication Date: 2021-10-29
SHANGHAI TIANMA AM OLED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the existing phosphorescent host materials still have many deficiencies in terms of luminescence performance, use stability and processing performance, and cannot meet the application requirements of them as luminescent materials in display devices. The improvement and balance of comprehensive performance of phosphorescent host materials There is also a lot of room for improvement

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Example 1 Compound M1

[0050]

[0051] The preparation method of this organic compound M1 comprises the steps:

[0052]

[0053] Compound M1-1 (4mmol) and bis(triphenylphosphine)palladium dichloride Pd(PPh 3 ) 2 Cl 2 (0.17mmol) was added to a three-necked flask, stirred and dissolved with 300mL N,N-dimethylformamide (DMF), under nitrogen protection, at room temperature, slowly added liquid bromine (2mmol) dropwise, the reaction solution was stirred at room temperature for 2h, pumped After filtration, the filter cake was recrystallized with ethanol to obtain a solid, namely intermediate M1-2.

[0054]

[0055] In a 250mL round bottom flask, M1-2 (12mmol) obtained in step (1), compound P1 (12mmol) and Na 2 CO 3 (80mmol) were added to toluene / absolute ethanol EtOH / H 2 O (75 / 25 / 50, mL) solvent, to form a mixed solution, and then tetrakis (triphenylphosphine) palladium Pd (PPh 3 ) 4 (0.48mmol) was added to the above mixed solution, and the obtained intermed...

Embodiment 2

[0058] Example 2 Compound M2

[0059]

[0060] The preparation method of this organic compound M2 comprises the steps:

[0061]

[0062] In a 250mL round bottom flask, M1-2 (12mmol, the same preparation method as in Example 1), compound P2 (12mmol) and Na 2 CO 3 (80mmol) were added to toluene / EtOH / H 2 In O (75 / 25 / 50, mL) solvent, a mixed solution was formed, and then Pd(PPh 3 ) 4 (0.48mmol) was added to the above mixed solution, and the obtained intermediate was refluxed for 24h under a nitrogen atmosphere, cooled to room temperature, added to water, filtered through a diatomaceous earth pad, extracted with dichloromethane, washed with water, and After drying over anhydrous magnesium sulfate, filtration and evaporation, the crude product was purified by silica gel column chromatography to obtain intermediate product M2-1.

[0063]

[0064] In a 250mL round bottom flask, the intermediate product M2-1 (12mmol) obtained in step (2), compound P1 (12mmol) and Na 2 CO...

Embodiment 3

[0067] Example 3 Compound M3

[0068]

[0069] The preparation method of this organic compound M3 comprises the steps:

[0070]

[0071] In a 250mL round bottom flask, M1-2 (12mmol, the preparation method is the same as in Example 1), compound P3 (12mmol) and Na 2 CO 3 (80mmol) were added to toluene / EtOH / H 2 In O (75 / 25 / 50, mL) solvent, a mixed solution was formed, and then Pd(PPh 3 ) 4 (0.48mmol) was added to the above mixed solution, and the obtained intermediate was refluxed for 24h under a nitrogen atmosphere, cooled to room temperature, added to water, filtered through a diatomaceous earth pad, extracted with dichloromethane, washed with water, and After drying over anhydrous magnesium sulfate, filtration and evaporation, the crude product was purified by silica gel column chromatography to obtain intermediate product M3-1.

[0072]

[0073] In a 250mL round bottom flask, the intermediate product M3-1 (12mmol) obtained in step (2), compound P1 (12mmol) and N...

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Abstract

The invention provides an organic electroluminescent compound which has a structure as shown in a formula I. The invention provides a series of OLED luminescent layer materials which take nitrogen-containing and phosphorus-containing oxygen group large heterocyclic rings as frameworks and are connected with arylamine aromatic rings, the OLED luminescent layer materials have excellent carrier transport performance, balance between electron mobility and hole mobility and stability, and the OLED luminescent layer materials as luminescent layer main body materials can remarkably improve the luminescent efficiency of devices and prolong the service life of the devices. The material reduces turn-on voltage (driving voltage) and energy consumption, and is a host material with excellent performance. The series of materials are organic compounds, and compared with phosphorescent metal complexes, the organic compounds are low in cost and environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of organic electroluminescent materials, in particular to an organic electroluminescent compound and its application. Background technique [0002] As a new generation of display technology, organic electroluminescent materials (OLED) have the advantages of ultra-thin, self-luminous, wide viewing angle, fast response, high luminous efficiency, good temperature adaptability, simple production process, low driving voltage, and low energy consumption. It has been widely used in industries such as flat panel display, flexible display, solid state lighting and vehicle display. [0003] According to the mechanism of light emission, it can be divided into two types: electrofluorescence and electrophosphorescence. Fluorescence is the radiative decay transition of singlet excitons, and phosphorescence is the light emitted by the radiative decay of triplet excitons to the ground state. According to the spin quantum ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F9/6568C09K11/06H01L51/54H01L51/50
CPCC07F9/65685C09K11/06C09K2211/1029C09K2211/1096C09K2211/1007C09K2211/1044C09K2211/1059C09K2211/104C09K2211/1033C09K2211/1037C09K2211/1011H10K85/615H10K85/654H10K85/657H10K85/6572H10K85/40H10K50/11
Inventor 邓东阳陈庆李侠刘营张磊
Owner SHANGHAI TIANMA AM OLED
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