Bipolar blue phosphorescent host material as well as preparation method and application thereof

A technology of phosphorescent main body and main material, which is applied in the direction of luminescent materials, chemical instruments and methods, semiconductor/solid-state device manufacturing, etc., which can solve problems such as shortage, and achieve reduced manufacturing costs, cheap and easy-to-obtain raw materials, and good thermal stability Effect

Inactive Publication Date: 2015-03-18
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 phosphorescent host material as well as preparation method and application thereof
  • Bipolar blue phosphorescent host material as well as preparation method and application thereof
  • Bipolar blue phosphorescent host material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: The bipolar blue phosphorescent host material of this embodiment, namely 9-(10-(3-(1-phenyl-1H-benzo[d]imidazol-2-yl)phenyl)anthracene-9 -Radical)-9H-carbazole, the preparation steps are as follows:

[0027]

[0028] Under the protection of argon, 9-(10-pinacol borate anthracene-9-yl)-9H-carbazole (93.8mg, 0.2mmol), 2-(3-bromophenyl)-1-phenyl -1H-Benzo[d]imidazole (69.8mg, 0.2mmol) was added to the flask containing 10ml of toluene solvent, and after fully dissolved, potassium carbonate (2mL, 2mol / L) solution was added to the flask, vacuumed to remove oxygen and Fill with argon, then add bistriphenylphosphine dichloride palladium (5.6mg, 0.008mmol); heat the flask to 120°C for Suzuki coupling reaction for 24h. Stop the reaction and cool to room temperature. After extracting with dichloromethane several times, combine the organic phases, then dry the organic phases with anhydrous magnesium sulfate and spin-dry to obtain a crude product. The crude product uses ...

Embodiment 2

[0030] Embodiment 2: The bipolar blue phosphorescent host material of this embodiment, namely 9-(10-(3-(1-phenyl-1H-benzo[d]imidazol-2-yl)phenyl)anthracene-9 -Radical)-9H-carbazole, the preparation steps are as follows:

[0031]

[0032] Under the protection of a mixture of nitrogen and argon, 9-(10-pinacol borate anthracene-9-yl)-9H-carbazole (141mg, 0.3mmol), 2-(3-bromophenyl)-1 -Phenyl-1H-benzo[d]imidazole (115mg, 0.33mmol) and 15mL of tetrahydrofuran were added to a 50mL two-necked flask. After fully dissolved, a mixture of nitrogen and argon was introduced to exhaust the air for about 20 minutes, and then the four Triphenylphosphine palladium (4mg, 0.003mmol) was added to it, and after it was fully dissolved, sodium bicarbonate (3mL, 2mol / L) solution was added. After fully ventilating the mixed gas of nitrogen and argon for about 10 minutes, the two-neck flask was added to 70 ℃ for Suzuki coupling reaction for 48 hours. Stop the reaction and cool to room temperature. After...

Embodiment 3

[0033] Embodiment 3: The bipolar blue phosphorescent host material of this embodiment, namely 9-(10-(3-(1-phenyl-1H-benzo[d]imidazol-2-yl)phenyl)anthracene-9 -Radical)-9H-carbazole, the preparation steps are as follows:

[0034]

[0035] Under the protection of nitrogen, add 9-(10-pinacol borate anthracene-9-yl)-9H-carbazole (141mg, 0.3mmol), 2-(3-bromophenyl)-1-phenyl-1H -Benzo[d]imidazole (125mg, 0.36mmol), palladium acetate (3.5mg, 0.015mmol) and tris (o-methoxyphenyl) phosphine (21mg, 0.06mmol) were added to 12mL of N, N- Add potassium carbonate (3mL, 2mol / L) solution to the dimethylformamide flask after fully dissolving, and then purge the flask with nitrogen gas for about 30min; heat the flask to 130°C for Suzuki coupling reaction for 12h. Stop the reaction and cool to room temperature. After extracting with dichloromethane several times, combine the organic phases, then dry the organic phases with anhydrous magnesium sulfate and spin-dry to obtain a crude product. The cru...

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PUM

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Abstract

The invention belongs to the field of organic semiconductor materials and discloses a bipolar blue phosphorescent host material as well as a preparation method and application thereof. A structural formula of the material is shown in the specification. The bipolar blue phosphorescent host material provided by the invention has the advantages that the host material has hole transport property and electron transport property at the same time, so that holes and electrons in a luminescent layer are balanced in transport; the host material also has a higher triplet energy level, so that energy is effectively prevented from being transferred back to the host material in the 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 phosphorescent host material and a preparation method and application thereof. Background technique [0002] Organic electroluminescent devices have the advantages of low driving voltage, fast response speed, wide viewing angle range, and the ability to fine-tune the chemical structure to change the luminous performance to make the color rich, easy to achieve high resolution, light weight, large-area flat panel display, etc., known as " Flat panel display technology in the 21st century" has become a hot spot in the fields of materials, information, physics and other disciplines and flat panel displays. In the future, high-efficiency commercial organic light-emitting diodes 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D403/10C09K11/06H01L51/54
CPCC09K11/06C07D403/10C09K2211/1044C09K2211/1011C09K2211/1007C09K2211/1029H10K85/615H10K85/6572
Inventor 周明杰张振华王平陈吉星
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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