Dibenzothiophene unit-containing blue light phosphorescent body material, preparation method thereof and organic electroluminescent device

A technology of dibenzothiophene and phosphorescent host is applied in the field of blue phosphorescent host material and its preparation, and organic electroluminescent devices, which can solve problems such as shortage, and achieve the effects of reduced manufacturing cost, reduced technological process and easy availability of raw materials

Inactive Publication Date: 2014-12-31
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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  • Dibenzothiophene unit-containing blue light phosphorescent body material, preparation method thereof and organic electroluminescent device
  • Dibenzothiophene unit-containing blue light phosphorescent body material, preparation method thereof and organic electroluminescent device
  • Dibenzothiophene unit-containing blue light phosphorescent body material, preparation method thereof and organic electroluminescent device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1: The blue phosphorescent host material containing dibenzothiophene units of this example, namely 4-(9,9'-spirobifluoren-4-yl)dibenzo[b,d]thiophene, is prepared as follows :

[0039]

[0040] Under the protection of argon, 4-bromo-9,9'-spirobifluorene (79mg, 0.2mmol), benzo[b,d]dithiophene-4-boronic acid (46mg, 0.2mmol) were added to 10ml of toluene solvent In the flask, after fully dissolving, add potassium carbonate (2mL, 2mol / L) solution into the flask, vacuum to remove oxygen and fill with argon, then add bistriphenylphosphine palladium dichloride (5.6mg, 0.008mmol ); The flask was heated to 100°C for Suzuki coupling reaction for 24h. The reaction was stopped and cooled to room temperature. The reaction solution was extracted three times with dichloromethane, and the organic phases obtained from the extraction were combined. The organic phase was dried with anhydrous magnesium sulfate and spin-dried to obtain a crude product. The crude product was used with a...

Embodiment 2

[0042] Embodiment 2: The blue phosphorescent host material containing dibenzothiophene units of this embodiment, namely 4-(9,9'-spirobifluoren-4-yl)dibenzo[b,d]thiophene, is prepared as follows :

[0043]

[0044] Under the protection of a mixture of nitrogen and argon, combine 4-bromo-9,9'-spirobifluorene (119mg, 0.3mmol), benzo[b,d]dithiophene-4-boronic acid (75mg, 0.33mmol) and 15mL Tetrahydrofuran was added to a 50mL two-necked flask, and after it was fully dissolved, a mixture of nitrogen and argon was introduced to exhaust the air for about 20 minutes, then tetrakistriphenylphosphine palladium (4mg, 0.003mmol) was added to it, and carbonic acid was added after fully dissolved Sodium hydrogen (3mL, 2mol / L) solution. After fully ventilating the mixture of nitrogen and argon for about 10 minutes, the two-neck flask was added to 70°C for Suzuki coupling reaction for 48 hours. The reaction was stopped and cooled to room temperature. The reaction solution was extracted three ti...

Embodiment 3

[0045] Embodiment 3: The blue phosphorescent host material containing dibenzothiophene units of this embodiment, namely 4-(9,9'-spirobifluoren-4-yl)dibenzo[b,d]thiophene, is prepared as follows :

[0046]

[0047] Under the protection of nitrogen, 4-bromo-9,9'-spirobifluorene (119mg, 0.3mmol), benzo[b,d]dithiophene-4-boronic acid (81mg, 0.36mmol), palladium acetate (3.5mg, 0.015mmol) and tris(o-methoxyphenyl)phosphine (21mg, 0.06mmol) were added to a flask containing 12mL of N,N-dimethylformamide, and potassium carbonate (3mL, 2mol / L) Solution, and then purge the flask with nitrogen gas for about 30 minutes; heat the flask to 130°C for Suzuki coupling reaction for 12 hours. The reaction was stopped and cooled to room temperature. The reaction solution was extracted three times with dichloromethane, and the organic phases obtained from the extraction were combined. The organic phase was dried over anhydrous magnesium sulfate and spin-dried to obtain a crude product. The crude pr...

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Abstract

The invention belongs to the field of organic semiconductor materials, and discloses a dibenzothiophene unit-containing blue light phosphorescent body material, a preparation method thereof and an organic electroluminescent device; and the structural formula of the body material is shown in the specification. The dibenzothiophene unit-containing blue light phosphorescent body material has higher triplet state energy level, can effectively prevent the energy from being back conveyed to the body material in the luminescence process.

Description

Technical field [0001] The invention relates to the field of organic semiconductors, in particular to a blue phosphorescent host material containing dibenzothiophene units and a preparation method thereof. The invention also relates to an organic electroluminescent device using the blue phosphorescent host material containing dibenzothiophene units as the host material of the light-emitting layer. 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-emitt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D333/76C09K11/06H01L51/54
CPCC09K11/06C07D333/76C09K2211/1011C09K2211/1092H10K85/624H10K85/6576
Inventor 周明杰张振华王平冯小明
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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