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Organic electroluminescent material taking arylamine structure as central skeleton as well as preparation method and application of organic electroluminescent material

A technology of electroluminescent material and central skeleton, applied in luminescent materials, organic chemistry, chemical instruments and methods, etc., can solve problems such as low luminous efficiency and inability to meet high refractive index

Inactive Publication Date: 2020-10-23
JILIN OPTICAL & ELECTRONICS MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the refractive index of existing CPL materials is generally below 1.9, which cannot meet the requirements of high refractive index, and the luminous efficiency is low

Method used

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  • Organic electroluminescent material taking arylamine structure as central skeleton as well as preparation method and application of organic electroluminescent material
  • Organic electroluminescent material taking arylamine structure as central skeleton as well as preparation method and application of organic electroluminescent material
  • Organic electroluminescent material taking arylamine structure as central skeleton as well as preparation method and application of organic electroluminescent material

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Experimental program
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preparation example Construction

[0052] The present invention provides a method for preparing an organic electroluminescent material described in the above technical solution, comprising the following steps:

[0053] reacting a substance having a structure of formula G with a substance having a structure of formula H to obtain an organic electroluminescent material having a structure of formula I;

[0054] The Hal is selected from halogen; preferably selected from Br or Cl;

[0055]

[0056] In the present invention, Ar in formula G 1 and Ar 2 , R 1 The selection of the substituents of L and X is consistent with the above-mentioned technical scheme, and will not be repeated here.

[0057] The substance having the structure of formula G is preferably prepared according to the following method:

[0058] Under the protection of nitrogen, the substance with formula E and the substance with formula F are reacted in the presence of potassium carbonate and tetrakistriphenylphosphine palladium to obtain the ...

Embodiment 1

[0088]

[0089] in N 2 Under protection, raw material A-1 (11.65g, 50mmol) and raw material B-1 (8.46g, 50mmol) were added to 120ml of toluene solution and stirred. After stirring at 50°C for 15min, sodium tert-butoxide (9.61g, 100mmol) was added ), tri-tert-butylphosphine (0.20g, 1mmol), tris(dibenzylideneacetone) dipalladium (0.46g, 0.5mmol), after the addition was completed, it was heated to 80°C for reaction, and the reaction time was 5 hours. After the reaction was completed, , the solution was cooled to room temperature, and after suction filtration, the concentrated product was recrystallized from 100ml toluene solution to obtain intermediate C-1 (13.2g, yield: 82.14%).

[0090]

[0091] in N 2 Under protection, intermediate C-1 (13.0g, 40.45mmol) and raw material D-1 (7.74g, 40.45mmol) were added to 130ml of toluene solution and stirred at 50°C for 15min, then sodium tert-butoxide (9.61 g, 80.9mmol), tri-tert-butylphosphine (0.16g, 0.81mmol), tris(dibenzylidene...

Embodiment 2

[0097]

[0098] in N 2 Under protection, A-5 (19.86g, 50mmol) and B-5 (8.46g, 50mmol) were added to 200ml of toluene solution and stirred. After stirring at 50°C for 15min, sodium tert-butoxide (9.61g, 100mmol) was added, Tri-tert-butylphosphine (0.20g, 1.0mmol) and tris(dibenzylideneacetone)dipalladium (0.46g, 0.5mmol) were added, heated to 80°C, after the reaction was completed, the solution was cooled to room temperature, and suction filtered The concentrated product was recrystallized from 200ml toluene solution to obtain intermediate C-5 (19.52g, yield: 80.39%).

[0099]

[0100] in N 2 Under protection, raw material C-5 (19.5g, 40.15mmol) and raw material D-5 (7.69g, 40.15mmol) were added to 200ml of toluene solution and stirred at 50°C for 15min, then sodium tert-butoxide (7.72g , 80.3mmol), tri-tert-butylphosphine (0.18g, 0.9mmol), tris(dibenzylideneacetone) dipalladium (0.37g, 0.40mmol) were added, heated to 80°C, after the reaction was completed, after suctio...

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Abstract

The invention provides an organic electroluminescent material taking an arylamine structure as a central skeleton as well as a preparation method and application of the organic electroluminescent material. The organic electroluminescent material has a structure represented by a formula I which is described in the specification. The arylamine compound provided by the invention has a relatively highrefractive index. When the arylamine compound is used as a cap layer of an organic light-emitting display device, the light extraction efficiency of a top-emitting organic photoelectric device can beimproved. The arylamine compound has a relatively small extinction coefficient in a blue light region and hardly absorbs blue light, so that improvement of the luminous efficiency of the arylamine compound is facilitated; water and oxygen in the external environment are effectively blocked, the OLED display panel is protected from being eroded by water and oxygen, and an organic EL element with high efficiency and long service life can be achieved; the Tg of the organic electroluminescent material is 150 to 165 DEG C; the refractive index under the wavelength of 450 nm ranges from 2.14 to 2.25; the refractive index under the wavelength of 530 nm ranges from 2.08 nm to 2.21 nm; and the refractive index under the wavelength of 635nm is 2.03 to 2.18.

Description

technical field [0001] The invention belongs to organic electroluminescent materials, in particular to an organic electroluminescent material with an aromatic amine structure as the central skeleton, a preparation method and application thereof. Background technique [0002] Organic Light Emitting Display (OLED for short), as a new type of flat panel display, has made great progress after decades of development. In the two important fields of lighting and display, OLED occupies an important share, especially in the field of flat panel display. The saying "everyone has a big screen and a small screen" has become a reality. [0003] Although its internal quantum efficiency is close to 100%, its external quantum efficiency is only about 20%. Most of the light is confined inside the light-emitting device due to factors such as substrate mode loss, surface plasmon loss, and waveguide effect, resulting in a large amount of energy loss. [0004] Until now, many improvements have ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D307/77C07D307/91C07D409/12C07D409/14C07D405/14C07D405/10C09K11/06H01L51/54
CPCC07D307/77C07D307/91C07D409/12C07D409/14C07D405/14C07D405/10C09K11/06C09K2211/1011C09K2211/1088C09K2211/1092C09K2211/1029H10K85/654H10K85/6576H10K85/6574H10K85/6572
Inventor 马晓宇金成寿黄悦徐佳楠王永光敖日斯楞孙向南
Owner JILIN OPTICAL & ELECTRONICS MATERIALS
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