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Organic electroluminescent material containing triphenylamine structure and organic electroluminescent device using organic electroluminescent material

A technology of electroluminescent materials and electroluminescent devices, which is applied in the directions of luminescent materials, electro-solid devices, electrical components, etc., can solve the problems of high starting voltage, short service life, low luminous efficiency, etc., and achieves improved efficiency and service life, The effect of prolonging life and improving light output

Pending Publication Date: 2021-03-26
NANJING TOPTO MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The selection and use of organic electroluminescent materials for each layer plays a decisive role in the performance of OLED devices. At present, OLED devices still have many defects such as high starting voltage, low luminous efficiency, and short service life. The use can greatly improve the performance of OLED devices and improve the application prospects

Method used

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  • Organic electroluminescent material containing triphenylamine structure and organic electroluminescent device using organic electroluminescent material
  • Organic electroluminescent material containing triphenylamine structure and organic electroluminescent device using organic electroluminescent material
  • Organic electroluminescent material containing triphenylamine structure and organic electroluminescent device using organic electroluminescent material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050]

[0051] The synthetic method of organic electroluminescent material (1) is as follows:

[0052]

[0053]Compound 1-a (2g, 731.13g / mol, 2.74mmol), compound 1-b (3.1eq, 1.38g, 163.04g / mol, 8.49mmol) and sodium carbonate (6eq, 1.74g, 105.99g / mol, 16.44mmol) into ethylene glycol diamine ether (40g, 20 times the quality of compound 1-a) and water (40g, 20 times the quality of compound 1-a), stir and mix and then add three (o-toluene Base) phosphine (5%eq, 0.042g, 304.37g / mol, 0.14mmol) and palladium (II) acetate (1%eq, 0.006g, 224.51g / mol, 0.027mmol), after warming up to reflux for 15h, the The organic phase was separated, washed with water, and concentrated under reduced pressure to obtain a crude product, which was then subjected to column chromatography to obtain an organic electroluminescent material (1) (1.71g, yield 73.6%), MS (EI): 848 (M + ).

Embodiment 2

[0055]

[0056] The synthetic method of organic electroluminescent material (2) is as follows:

[0057]

[0058] Compound 2-a (2g, 478.85g / mol, 4.18mmol), compound 2-b (3.1eq, 2.76g, 213.06 / mol, 12.95mmol) and sodium carbonate (6eq, 2.66g, 105.99g / mol, 25.06 mmol) into ethylene glycol diamine ether (40g, 20 times the mass of compound 2-a) and water (40g, 20 times the mass of compound 2-a), stir and mix and then add three (o-tolyl) ) phosphine (5%eq, 0.064g, 304.37g / mol, 0.21mmol) and palladium (II) acetate (1%eq, 0.009g, 224.51g / mol, 0.042mmol), after warming up to reflux reaction for 15h, the organic The phases were separated, washed with water, and concentrated under reduced pressure to obtain a crude product, which was then subjected to column chromatography to obtain an organic electroluminescent material (2) (2.28g, yield 73.2%), MS (EI): 746 (M + ).

Embodiment 3

[0060]

[0061] The synthetic method of organic electroluminescent material (4) is as follows:

[0062]

[0063] Compound 3-a (2g, 478.85g / mol, 4.18mmol), compound 3-b (3.1eq, 3.41g, 263.08 / mol, 12.95mmol) and sodium carbonate (6eq, 2.66g, 105.99g / mol, 25.06 mmol) into ethylene glycol diamine ether (40g, 20 times the quality of compound 3-a) and water (40g, 20 times the quality of compound 3-a), stir and mix and then add three (o-tolyl) ) phosphine (5%eq, 0.064g, 304.37g / mol, 0.21mmol) and palladium (II) acetate (1%eq, 0.009g, 224.51g / mol, 0.042mmol), after warming up to reflux reaction for 15h, the organic The phases were separated, washed with water, and concentrated under reduced pressure to obtain a crude product, which was then subjected to column chromatography to obtain an organic electroluminescent material (4) (2.24g, yield 71.8%), MS (EI): 746 (M + ).

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Abstract

The invention discloses an organic electroluminescent material containing a triphenylamine structure and an organic electroluminescent device using the organic electroluminescent material, and relatesto the field of organic electroluminescent materials. The structural formula of the organic electroluminescent material is shown in the specification, wherein L1, L2 and L3 are respectively and independently substituted or unsubstituted phenylene, Ar1, Ar2 and Ar3 are hydrogen, phenyl, a formula (I) and a formula (II)respectively and independently, Ar1, Ar2 and Ar3 are not hydrogen at the same time, Ar4 is a substituted or unsubstituted C6-C60 aromatic hydrocarbon group, and X1 and X2 are respectively and independently O or S. When the organic electroluminescent compound is applied to the organic electroluminescent device, the luminous efficiency is improved to a certain extent under the same current density, the starting voltage of the device is reduced, the power consumption is relatively reduced, and the service life is correspondingly prolonged.

Description

technical field [0001] The invention relates to the field of organic electroluminescent materials, in particular to an organic electroluminescent material containing a triphenylamine structure and an organic electroluminescent device using the material. Background technique [0002] OLED is a current-type organic light-emitting device, which is a phenomenon of luminescence caused by injection and recombination of carriers, and the luminous intensity is proportional to the injected current. Under the action of an electric field in the OLED, the holes generated by the anode and the electrons generated by the cathode will move, inject into the hole transport layer and the electron transport layer respectively, and migrate to the light emitting layer. When the two meet in the light-emitting layer, energy excitons are generated, which excite light-emitting molecules and finally produce visible light. [0003] OLED device consists of substrate, cathode, cover layer (CPL), anode, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D263/62C07D265/12C07D277/60C07D277/66C07D277/84C07D279/08C07D413/14C07D417/14C07D498/04C07D498/06C07D513/04C07D513/06C07D519/00C09K11/06H01L51/54
CPCC07D263/62C07D265/12C07D519/00C07D498/04C07D498/06C07D277/66C07D277/84C07D277/60C07D279/08C07D417/14C07D513/06C07D413/14C07D513/04C09K11/06C09K2211/1014C09K2211/1033C09K2211/1037C09K2211/1048C09K2211/1051H10K85/631H10K85/657
Inventor 钱超许军
Owner NANJING TOPTO MATERIALS CO LTD