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Bipolar blue-ray phosphorescent main body material as well as preparation method and application thereof

A phosphorescent main body and bipolar technology, which is applied in the direction of luminescent materials, chemical instruments and methods, semiconductor/solid-state device manufacturing, etc., can solve problems such as shortage, achieve the effects of reduced manufacturing costs, good thermal stability, and improved luminous efficiency

Inactive Publication Date: 2015-04-29
OCEANS KING LIGHTING SCI&TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few efficient blue phosphorescent devices, mainly due to the lack of both good carrier transport performance and high triplet energy level (E T ) of the host material

Method used

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  • Bipolar blue-ray phosphorescent main body material as well as preparation method and application thereof
  • Bipolar blue-ray phosphorescent main body material as well as preparation method and application thereof
  • Bipolar blue-ray phosphorescent main body material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Example 1: The bipolar blue phosphorescence host material of this example is: 9-(3-(dibenzo[b,d]furan-2-yl)phenyl)-9H-carbazole, the preparation steps are as follows :

[0041]

[0042] The preparation steps of above-mentioned small organic molecules are as follows:

[0043] The reaction formula is as follows:

[0044]

[0045] Under argon protection, 9-(3-pinacol borate phenyl)-9H-carbazole (74mg, 0.2mmol), 2-bromodibenzo[b,d]furan (49mg, 0.2mmol) Add it to a flask containing 10ml of toluene solvent, and after fully dissolving, add a solution of potassium carbonate (2mL, 2mol / L) into the flask, vacuumize the oxygen and fill it with argon, then add bistriphenylphosphine palladium dichloride (5.6mg, 0.008mmol); the flask was heated to 120°C for Suzuki coupling reaction for 24h. Stop the reaction and cool to room temperature, extract three times with dichloromethane, then dry the organic phase with anhydrous magnesium sulfate and spin dry to obtain the crude prod...

Embodiment 2

[0047] Example 2: The bipolar blue phosphorescence host material of this example is: 9-(3-(dibenzo[b,d]furan-2-yl)phenyl)-9H-carbazole, the preparation steps are as follows :

[0048]

[0049] The preparation steps of above-mentioned small organic molecules are as follows:

[0050] The reaction formula is as follows:

[0051]

[0052] Under the protection of mixed gas of nitrogen and argon, 9-(3-pinacol borate phenyl)-9H-carbazole (111mg, 0.3mmol), 2-bromodibenzo[b,d]furan (81.2 mg, 0.33mmol) and 15mL tetrahydrofuran into a 50mL two-necked bottle, fully dissolved, and then a mixture of nitrogen and argon was introduced to exhaust the air for about 20 minutes, and then tetrakistriphenylphosphine palladium (4mg, 0.003mmol) was added to it , fully dissolved and then added sodium bicarbonate (3mL, 2mol / L) solution. After the mixed gas of nitrogen and argon was sufficiently exhausted for about 10 minutes, the two-neck flask was added to 70° C. for Suzuki coupling reaction fo...

Embodiment 3

[0053] Example 3: The bipolar blue phosphorescence host material of this example is: 9-(3-(dibenzo[b,d]furan-2-yl)phenyl)-9H-carbazole, the preparation steps are as follows :

[0054]

[0055] The preparation steps of above-mentioned small organic molecules are as follows:

[0056] The reaction formula is as follows:

[0057]

[0058] Under nitrogen protection, 9-(3-pinacol borate phenyl)-9H-carbazole (111mg, 0.3mmol), 2-bromodibenzo[b,d]furan (88.6mg, 0.36mmol), Palladium acetate (3.5mg, 0.015mmol) and tri(o-methylphenyl)phosphine (21mg, 0.06mmol) were added to a flask containing 12mL of N,N-dimethylformamide, and potassium carbonate was added after fully dissolving (3mL, 2mol / L) solution, and then pass nitrogen gas into the flask to evacuate the air for about 30min; heat the flask to 130°C for Suzuki coupling reaction for 12h. Stop the reaction and cool to room temperature, extract three times with dichloromethane, then dry the organic phase with anhydrous magnesium...

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Abstract

The invention relates to the field of organic electroluminescent materials and discloses a bipolar blue-ray phosphorescent main body material as well as a preparation method and application thereof. The structural formula of the material is shown in the specification. The bipolar blue-ray phosphorescent main body material has a bipolar carrier transmission capacity; carbazole is of a heterocyclic structure and is an excellent hole transmission unit; dibenzofuran is a relatively good electronic transmission unit. Therefore, the material has a hole transmission property and an electronic transmission property, and the transmission of holes and electrons in a light emitting layer is balanced; the material further has a relatively high triplet state energy level, and the energy can be effectively prevented from being transferred back to the main body material in the light emitting process, so that the light emitting efficiency of the bipolar blue-ray phosphorescent main body material is improved.

Description

technical field [0001] The invention relates to the field of organic electroluminescent materials, in particular to a bipolar blue phosphorescence host material and its preparation method and application. Background technique [0002] Organic electroluminescent devices have the advantages of low driving voltage, fast response speed, wide viewing angle range, and can change the luminous performance through fine-tuning of chemical structure to make rich colors, easy to achieve high resolution, light weight, and large-area flat-panel display. 21st Century Flat Panel Display Technology" has become a research hotspot in the fields of materials, information, physics and flat panel display. Future efficient commercial OLEDs will likely contain organometallic phosphors because they can trap both singlet and triplet excitons, thereby achieving 100% internal quantum efficiency. However, due to the relatively long lifetime of excited-state excitons in transition metal complexes, the u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06C07D405/10H01L51/54
Inventor 周明杰张振华王平钟铁涛
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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