Bipolar blue-light emitting host material, and preparation method and application thereof

A blue-light host material, bipolar technology, applied in luminescent materials, chemical instruments and methods, semiconductor/solid-state device manufacturing, etc., can solve problems such as lack, and achieve the effects of reduced manufacturing cost, good solubility, and novel structure

Inactive Publication Date: 2015-01-21
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 emitting host material, and preparation method and application thereof
  • Bipolar blue-light emitting host material, and preparation method and application thereof
  • Bipolar blue-light emitting host material, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The bipolar blue light host material of this example has a structure of 9-(10-(4-(diphenylphosphinethio)phenyl)anthracen-9-yl)-9H-carbazole, and the preparation steps are as follows:

[0030]

[0031] Under argon protection, 9-(10-(pinacol borate)anthracen-9-yl)-9H-carbazole (94mg, 0.2mmol), (4-bromophenyl)diphenylphosphinesulfur ( 75mg, 0.2mmol) was added to a flask containing 10ml of toluene solvent, and after fully dissolving, potassium carbonate (2mL, 2mol / L) solution was added to the flask, vacuumed to remove oxygen and filled with argon, and then added bistriphenyl Phosphine palladium dichloride (5.6mg, 0.008mmol); the flask was heated to 90°C for Suzuki coupling reaction for 24h. Stop the reaction and cool to room temperature, extract the reaction solution with dichloromethane multiple times to obtain the organic phase and combine the organic phase, then dry the organic phase with anhydrous magnesium sulfate and spin dry the organic phase to obtain the crude p...

Embodiment 2

[0034] The bipolar blue light host material of this example has a structure of 9-(10-(4-(diphenylphosphinethio)phenyl)anthracen-9-yl)-9H-carbazole, and the preparation steps are as follows:

[0035]

[0036] Under the protection of mixed gas of nitrogen and argon, 9-(10-(pinacol borate) anthracene-9-yl)-9H-carbazole (141mg, 0.3mmol), (4-bromophenyl)diphenyl Add phosphine sulfur (123mg, 0.33mmol) and 15mL tetrahydrofuran into a two-necked bottle of 50mL specification, fully dissolve, pass in a mixture of nitrogen and argon to exhaust the air for about 20min, and then add tetrakistriphenylphosphine palladium (4mg, 0.003 mmol) into it, fully dissolved and then added sodium bicarbonate (3mL, 2mol / L) solution. 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. Stop the reaction and cool to room temperature, extract the reaction solution with dichloromethane multiple ti...

Embodiment 3

[0038] The bipolar blue light host material of this example has a structure of 9-(10-(4-(diphenylphosphinethio)phenyl)anthracen-9-yl)-9H-carbazole, and the preparation steps are as follows:

[0039]

[0040] Under nitrogen protection, 9-(10-(pinacol borate) anthracen-9-yl)-9H-carbazole (141mg, 0.3mmol), (4-bromophenyl)diphenylphosphinesulfur (135mg , 0.36mmol), palladium acetate (3.5mg, 0.015mmol) and three (o-methoxyphenyl) phosphine (21mg, 0.06mmol) were added to a flask containing 12mL of N,N-dimethylformamide, After fully dissolved, potassium carbonate (3mL, 2mol / L) solution was added, and then the flask was purged with nitrogen for about 30min; the flask was heated to 130°C for Suzuki coupling reaction for 12h. Stop the reaction and cool to room temperature, extract the reaction solution with dichloromethane multiple times to obtain the organic phase and combine the organic phase, then dry the organic phase with anhydrous magnesium sulfate and spin dry the organic phas...

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Abstract

The invention belongs to the field of organic semiconductor materials, and discloses a bipolar blue-light emitting host material, and a preparation method and an application thereof. The structural formula of the host material is shown in the specification. In the bipolar blue-light emitting host material, a carbazole group is an excellent hole transport unit; anthracene has a high fluorescence quantum yield; and a diphenylphosphinosulfenyl group contains electron-withdrawing P=S, and is good electron transfer unit, so the material has hole transport and electron transfer properties to realize hole and electron transfer balance in a luminescent layer, and has a high triplet energy level to effectively prevent the return of energy to the host material in a luminescence process in order to substantially improve the luminescence efficiency.

Description

technical field [0001] The invention relates to the field of organic semiconductor materials, in particular to a bipolar blue light 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, 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. However, due to the relatively long lifetime of excited-state excitons in transition metal complexes, the unwanted triplet-triplet (T 1 -T 1 ) are quenched in actua...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06C07F9/572H01L51/54
Inventor 周明杰张振华王平张娟娟
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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