Compound, display panel and display device

A display panel and compound technology, which is applied in the directions of silicon organic compounds, compounds of elements of Group 5/15 of the periodic table, compounds of elements of Group 4/14 of the periodic table, etc., can solve the problem of difficulty in developing doping materials, etc. To achieve the effect of improving equilibrium migration, EQE), lifetime improvement, and macromolecular density

Active Publication Date: 2022-07-12
WUHAN TIANMA MICRO ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the current research status, the commercialization of heavy metal doping materials is mature, and it is difficult to develop alternative doping materials

Method used

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  • Compound, display panel and display device
  • Compound, display panel and display device
  • Compound, display panel and display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] Synthesis of Compound H015

[0075]

[0076] In a 250ml round bottom flask, combine 3,3'-dibromo-spirofluorene silicon (15mmol), 3-boronate-9-phenyl-carbazole (15mmol) and Pd(PPh 3 ) 4 (0.3 mmol) was added to a mixture of toluene (30 mL) / ethanol (20 mL) and aqueous potassium carbonate (12 mmol) (10 mL) under N 2 Refluxed under atmosphere for 48 hours, the resulting intermediate was cooled to room temperature, added to water, then filtered through a pad of celite, extracted with dichloromethane, washed with water, dried over anhydrous magnesium sulfate, filtered and evaporated with The crude product was purified by silica gel column chromatography to obtain the intermediate product H015-1.

[0077] In a 250ml round bottom flask, the intermediate H015-1 (15mmol) and potassium acetate (40mmol) were mixed with dry 1,4-dioxane (60mL), Pd(PPh 3 ) 2 Cl 2 (0.4 mmol) and pinacol diboronate (25 mmol) were mixed and stirred at 90°C under nitrogen atmosphere for 48 hours. ...

Embodiment 2

[0081] Synthesis of Compound H020

[0082]

[0083] In a 250ml round bottom flask, combine 3,3'-dibromo-spirofluorene silicon (15mmol), 1-boronate-triphenylamine (15mmol) and Pd(PPh 3 ) 4 (0.3 mmol) was added to a mixture of toluene (30 mL) / ethanol (20 mL) and aqueous potassium carbonate (12 mmol) (10 mL) under N 2 Refluxed under atmosphere for 48 hours, the obtained intermediate was cooled to room temperature, added to water, then filtered through a pad of celite, extracted with dichloromethane, washed with water, dried over anhydrous magnesium sulfate, filtered and evaporated with The crude product was purified by silica gel column chromatography to obtain the intermediate product H020-1.

[0084] In a 250ml round-bottomed flask, combine the intermediate H020-1 (15mmol) and potassium acetate (40mmol) with dry 1,4-dioxane (60mL), Pd(PPh) 3 ) 2 Cl 2 (0.4 mmol) and pinacol diboronate (25 mmol) were mixed and stirred at 90°C under nitrogen atmosphere for 48 hours. The o...

Embodiment 3

[0088] Synthesis of Compound H036

[0089]

[0090] In a 250ml round bottom flask, combine 3,3'-dibromo-spirofluorene silicon (15mmol), copper iodide (15mmol), potassium tert-butoxide (65mmol), 1,2-diaminocyclohexane (12mmol) and 9H-carbazole (25 mmol) were added to dry 1,4-dioxane (400 mL) under N 2 Refluxed under atmosphere for 48 hours, the obtained intermediate was cooled to room temperature, added to water, then filtered through a pad of celite, extracted with dichloromethane, washed with water, dried over anhydrous magnesium sulfate, filtered and evaporated with The crude product was purified by silica gel column chromatography to obtain the intermediate product H036-1.

[0091] In a 250ml round bottom flask, the intermediate H036-1 (15mmol) and potassium acetate (40mmol) were mixed with dry 1,4-dioxane (60mL), Pd(PPh 3 ) 2 Cl 2 (0.4 mmol) and pinacol diboronate (25 mmol) were mixed and stirred at 90°C under nitrogen atmosphere for 48 hours. The obtained intermed...

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Abstract

The present invention belongs to the technical field of OLED and provides a compound used as a light-emitting host material, which has the structure shown in chemical formula (I); wherein a and b respectively represent the number of electron donors D and electron acceptors A and are greater than or Equal to 1, c and d are independently selected from 0, 1 or 2; L 1 or L 2 Preferably single bond or phenylene; electron donor D is preferably carbazolyl, diphenylamine, triphenylamine, acridine and their derivative groups; electron acceptor A is selected from nitrogen-containing heterocyclic substituents, Cyano-containing substituents, triarylboron-based substituents and phosphorus-containing oxygen-based substituents. The D-(π)-σ-(π)-A structure in the compound of the present invention has bipolarity, and the σ bond can effectively interrupt the intramolecular charge transfer between the electron donor D and the electron acceptor A, and make the excited state It is limited to the local excited state within the fragment of D or A, thus making the compound have a small excited state dipole moment. When it is used as the host material of the light-emitting layer, it can effectively reduce the efficiency roll-off of the blue light material, improve the luminous brightness and Luminous efficiency.

Description

technical field [0001] The present invention relates to the technical field of organic electroluminescent materials, in particular to a compound used as an OLED light-emitting host material, a display panel and a display device comprising the compound. Background technique [0002] As a new generation of display technology, organic electroluminescent material (OLED) has 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 flat panel display, flexible display, solid-state lighting and vehicle display industries. [0003] According to the light-emitting mechanism, the light emitted by OLEDs can be divided into two types: electrofluorescence and electrophosphorescence. Fluorescence is the light emitted by the radiative decay transition of a singlet exciton, and phosphorescence is the light emi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F7/10C07F7/08H01L51/54C09K11/06C07F9/6596
CPCC07F7/0816C07F7/083C09K11/06C07F9/6596C09K2211/1096C09K2211/1059C09K2211/1007C09K2211/1011C09K2211/1044C09K2211/1029C09K2211/1037H10K85/40
Inventor 张磊高威牛晶华代文朋林沙
Owner WUHAN TIANMA MICRO ELECTRONICS CO LTD
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