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Bipolar blue light phosphorescent host material, preparation method and organic electroluminescent device thereof

A phosphorescent main body and bipolar technology, which is applied in the bipolar blue phosphorescent main material and its preparation, and in the field of organic electroluminescent devices, can solve problems such as shortage, reduce manufacturing costs, improve luminous efficiency, and reduce process flow Effect

Inactive Publication Date: 2014-12-03
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 light phosphorescent host material, preparation method and organic electroluminescent device thereof
  • Bipolar blue light phosphorescent host material, preparation method and organic electroluminescent device thereof
  • Bipolar blue light phosphorescent host material, preparation method and organic electroluminescent device thereof

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Experimental program
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Effect test

Embodiment 1

[0040] The bipolar blue phosphorescent host material of this embodiment, that is, 3,6-bis(4-(4,6-diphenyl-1,3,5-triazin-2-yl)phenyl)-9-benzene Base-9H-carbazole, the structural formula is as follows:

[0041]

[0042] The preparation process of this compound is as follows:

[0043]

[0044] Under argon protection, 3,6-dibromo-9-phenyl-9H-carbazole (80mg, 0.2mmol), 2,4-diphenyl-6-(4-pinacol borate phenyl )-1,3,5-triazine (174mg, 0.4mmol) was added to a flask filled with 10ml of toluene solvent, and after fully dissolving, potassium carbonate (2mL, 2mol / L) solution was added to the flask, vacuumed to remove oxygen and Fill with argon, then add bistriphenylphosphine palladium dichloride (5.6mg, 0.008mmol); heat the flask to 100°C for Suzuki coupling reaction for 24h. Stop the reaction and cool to room temperature, extract three times with dichloromethane, combine the organic phases, spin dry after drying over anhydrous magnesium sulfate, the crude product adopts petroleum...

Embodiment 2

[0047] The bipolar blue phosphorescent host material of this embodiment, that is, 3,6-bis(4-(4,6-diphenyl-1,3,5-triazin-2-yl)phenyl)-9-benzene Base-9H-carbazole, the structural formula is as follows:

[0048]

[0049] The preparation process of this compound is as follows:

[0050]

[0051]Under the protection of mixed gas of nitrogen and argon, 3,6-dibromo-9-phenyl-9H-carbazole (120mg, 0.3mmol), 2,4-diphenyl-6-(4-pinacol boron Phenyl ester)-1,3,5-triazine (287mg, 0.66mmol) and 15mL tetrahydrofuran were added into a 50mL two-necked bottle, and after fully dissolving, a mixture of nitrogen and argon was introduced to exhaust the air for about 20 minutes, and then Tetrakistriphenylphosphinepalladium (4mg, 0.003mmol) was added thereto, and after fully dissolved, sodium bicarbonate (3mL, 2mol / L) solution was added. Then, the mixed gas of nitrogen and argon was exhausted for about 10 minutes, and the two-neck flask was added to 70°C for Suzuki coupling reaction for 48 hours...

Embodiment 3

[0053] The bipolar blue phosphorescent host material of this embodiment, that is, 3,6-bis(4-(4,6-diphenyl-1,3,5-triazin-2-yl)phenyl)-9-benzene Base-9H-carbazole, the structural formula is as follows:

[0054]

[0055] The preparation process of this compound is as follows:

[0056]

[0057] Under nitrogen protection, 3,6-dibromo-9-phenyl-9H-carbazole (120mg, 0.3mmol), 2,4-diphenyl-6-(4-pinacol borate phenyl) -1,3,5-triazine (313mg, 0.72mmol), palladium acetate (3.5mg, 0.015mmol) and three (o-methoxyphenyl) phosphine (21mg, 0.06mmol) were added to 12mL of N, In the flask of N-dimethylformamide, add potassium carbonate (3mL, 2mol / L) solution after fully dissolving, then blow nitrogen into the flask and exhaust 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, combine the organic phases, spin dry after drying over anhydrous magnesium sulfate, the ...

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Abstract

Belonging to the field of organic semiconductor materials, the invention discloses a bipolar blue light phosphorescent host material, a preparation method and an organic electroluminescent device thereof. The electron transport material has a structural formula shown as the specification. The bipolar blue light phosphorescent host material provided by the invention has bipolar carrier transport ability, also has hole transport properties and electron transport properties, and enables balance transport of holes and electrons in a luminescent layer. With a high triplet state energy level, the host material can effectively prevent back transmission of energy to the host material in a luminescence process, thus greatly improving the luminescence efficiency.

Description

technical field [0001] The invention relates to the field of organic semiconductor materials, in particular to a bipolar blue phosphorescence host material and a preparation method thereof. The invention also relates to an organic electroluminescent device using a bipolar blue phosphorescent host material as a host material for a light-emitting layer. Background technique [0002] Organic electroluminescent devices have the advantages of low driving voltage, fast response speed, wide viewing angle range, rich colors through fine-tuning of chemical structure, easy realization of 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. H...

Claims

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Application Information

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IPC IPC(8): C09K11/06C07D403/14H01L51/54
Inventor 周明杰张振华王平黄辉
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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