Organic compound, electroluminescent material and application thereof

A technology of electroluminescent materials and organic compounds, applied in the field of electroluminescent materials and organic compounds, can solve the problem that luminescent host materials cannot take into account energy consumption, efficiency, processability and working life, low luminous efficiency and working life, and lighting up. The problem of high voltage can improve the luminous brightness and luminous efficiency, improve the thermal stability of the molecule, and reduce the efficiency roll-off.

Active Publication Date: 2021-04-30
WUHAN TIANMA MICRO ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the currently disclosed host materials still have problems such as high turn-on voltage, high energy consumption, low luminous efficiency and working l

Method used

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  • Organic compound, electroluminescent material and application thereof
  • Organic compound, electroluminescent material and application thereof
  • Organic compound, electroluminescent material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0111] A kind of organic compound P2, the structure is as follows:

[0112]

[0113] The preparation method of this organic compound P2 comprises the steps:

[0114] (1)

[0115] Add compound P2-1 (3mmol), cuprous oxide (8mmol), dimethylacetamide (DMAC, 4mL) and P2-2 (3.5mmol) into a 50mL round bottom flask, and reflux at 170°C for 48h under argon atmosphere , the resulting intermediate was cooled to room temperature, added to water, then filtered through a pad of celite, the filtrate was extracted with dichloromethane, then washed with water, and dried with anhydrous magnesium sulfate, filtered and evaporated, purified by silica gel column chromatography The crude product gave intermediate P2-3.

[0116] Test the structure of intermediate P2-3: MALDI-TOF MS (m / z) obtained by matrix-assisted laser desorption ionization time-of-flight mass spectrometry analysis: C 27 h 17 ClN 2 , the calculated value is 404.1, and the tested value is 404.1.

[0117] (2)

[0118] I...

Embodiment 2

[0130] An organic compound P3 with the following structure:

[0131]

[0132] The preparation method of this organic compound P3 comprises the steps:

[0133] (1)

[0134] Intermediate P3-1 (3mmol), potassium acetate (8mmol) was mixed with dry 1,4-dioxane (15mL), Pd(PPh 3 ) 2 Cl 2 (0.4mmol) and diboronic acid pinacol ester (3.5mmol) were mixed, stirred at 90°C under nitrogen atmosphere for 24h; the obtained intermediate was cooled to room temperature, added to water, then filtered through a diatomaceous earth pad, and the filtrate After extraction, washed with water, dried over anhydrous magnesium sulfate, filtered and evaporated, the crude product was purified by silica gel column chromatography to obtain intermediate P3-2.

[0135] (2)

[0136] In a 50mL round bottom flask, add the intermediate P3-2 (3mmol), potassium carbonate (3mmol), Pd(PPh 3 ) 4 (0.5mmol), toluene (10mL), water (1mL) and compound P3-3 (3.5mmol), refluxed at 110°C for 48h under argon atmosph...

Embodiment 3

[0146] A kind of organic compound P18, the structure is as follows:

[0147]

[0148] The preparation method of this organic compound P18 comprises the steps:

[0149]

[0150] In a 50mL round bottom flask, the intermediate P3-5 (3mmol, the preparation method is the same as in Example 2), NaOt-Bu (3mmol), P(t-Bu) 3 (3mmol), Pd 2 (dba) 3 (0.4mmol), compound P18-1 (3.2mmol) and dry toluene (15mL) were mixed and stirred at 110°C for 24h under a nitrogen atmosphere. The resulting product was cooled to room temperature, added to water, and filtered through a pad of celite. The filtrate was extracted with dichloromethane, washed with water, and dried over anhydrous magnesium sulfate. After filtration and evaporation, the crude product was purified by silica gel column chromatography. The target product P18 was obtained.

[0151] Test the structure of the target product P18: MALDI-TOF MS (m / z) obtained by matrix-assisted laser desorption ionization time-of-flight mass spect...

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Abstract

The invention provides an organic compound, an electroluminescent material and application thereof, the organic compound has a structure as shown in a formula I, is an organic small molecular compound containing an aza-carbazole condensed ring structure, has the characteristic of bipolar property, has strong intramolecular charge transport capability, and can effectively reduce the efficiency roll-off of a blue light material, and the light-emitting brightness and the light-emitting efficiency are improved. The organic compound is especially suitable for being used as a host material, has a high triplet state energy level T1 and a large molecular density, and has a high glass transition temperature and good molecular thermal stability.Balanced migration of carriers is improved, an exciton recombination area is widened, light extraction efficiency is effectively improved, light emitting efficiency of the device is greatly improved, and service life of the device is greatly prolonged. And the organic compound has a very wide application prospect in electroluminescent devices.

Description

technical field [0001] The invention belongs to the technical field of organic electroluminescent materials, and in particular relates to an organic compound, an electroluminescent material and applications thereof. Background technique [0002] Organic electroluminescence (EL) is one of the most promising emerging technologies in the field of optoelectronic devices. Since the rise of organic electroluminescent materials and devices (organic light emitting diode, OLED) in 1987, it has attracted the attention of the scientific community. And the high attention of the industry, it is considered to be the most competitive technology in the field of new generation display. OLED technology has the advantages of ultra-thin, self-luminous, fast response, wide viewing angle, large-area display, high luminous efficiency, full luminous color, good temperature adaptability, simple production process, low driving voltage and low energy consumption. It is used in industries such as flat...

Claims

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Application Information

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IPC IPC(8): C07D471/06C07D471/16C07D487/06C07D519/00C09K11/06H01L51/54H01L51/50
CPCC07D471/06C07D487/06C07D471/16C07D519/00C09K11/06C09K2211/1044C09K2211/1051C09K2211/1048C09K2211/1029C09K2211/1059C09K2211/1088C09K2211/1033C09K2211/1011C09K2211/1014C09K2211/1092H10K85/624H10K85/615H10K85/622H10K85/656H10K85/631H10K85/6565H10K85/636H10K85/626H10K85/654H10K85/6576H10K85/6574H10K85/6572H10K50/11Y02E10/549
Inventor 代文朋高威张磊冉佺刘营邓东阳
Owner WUHAN TIANMA MICRO ELECTRONICS CO LTD
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