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A benzanthracene fluorenyl blue-light phosphorescent host material, a preparing method thereof and applications of the material

A benzanthracene fluorene-based, phosphorescent host technology, applied in the directions of luminescent materials, chemical instruments and methods, semiconductor/solid-state device manufacturing, etc. Effect

Inactive Publication Date: 2015-05-06
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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  • A benzanthracene fluorenyl blue-light phosphorescent host material, a preparing method thereof and applications of the material
  • A benzanthracene fluorenyl blue-light phosphorescent host material, a preparing method thereof and applications of the material
  • A benzanthracene fluorenyl blue-light phosphorescent host material, a preparing method thereof and applications of the material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1: The benzoanthracene fluorenyl blue phosphorescence host material in this example is 9-(spiro[benzo[de]anthracene-7,9'-fluorene]-2'-yl)-9H-carbazole, The structural formula is as follows:

[0027]

[0028] The preparation process of this compound is as follows:

[0029]

[0030] Under nitrogen protection, 2'-bromospiro[benzo[de]anthracene-7,9'-fluorene] (35.5g, 80mmol) was dissolved in 200mL N,N-dimethylformamide (DMF) solution, and then 9H-carbazole (33.3g, 80mmol), potassium carbonate (22.1g, 160mmol) and cuprous iodide (1.52g, 8mmol) were added to obtain a mixed solution, which was stirred and reacted at 120°C for 3 hours. Stop the reaction and cool to room temperature, filter, and wash the solid three times with distilled water. The crude product is separated by silica gel column chromatography using n-hexane as the eluent, and then dried under vacuum at 50°C for 24 hours to obtain an off-white solid benzanthracene fluorenyl blue phosphorescent host...

Embodiment 2

[0032] Example 2: The benzoanthracene fluorenyl blue phosphorescence host material in this example is 9-(spiro[benzo[de]anthracene-7,9'-fluorene]-2'-yl)-9H-carbazole, The structural formula is as follows:

[0033]

[0034] The preparation process of this compound is as follows:

[0035]

[0036] Under nitrogen protection, 2'-bromospiro[benzo[de]anthracene-7,9'-fluorene] (35.5g, 80mmol) was dissolved in 200mL toluene (Tol) solution, and then 9H-carbazole (14.7 g, 88mmol), cesium carbonate (57.2g, 176mmol), copper powder (0.768g, 12mmol) to obtain a mixed solution, which was stirred and reacted at 110°C for 6 hours. Stop the reaction and cool to room temperature, filter, and wash the solid three times with distilled water. The crude product is separated by silica gel column chromatography using n-hexane as the eluent, and then dried under vacuum at 50°C for 24 hours to obtain an off-white solid benzanthracene fluorenyl blue phosphorescent host material. The yield was 85%...

Embodiment 3

[0037] Example 3: The benzoanthracene fluorenyl blue phosphorescence host material in this example is 9-(spiro[benzo[de]anthracene-7,9'-fluorene]-2'-yl)-9H-carbazole, The structural formula is as follows:

[0038]

[0039] The preparation process of this compound is as follows:

[0040]

[0041] Under nitrogen protection, 2'-bromospiro[benzo[de]anthracene-7,9'-fluorene] (35.5g, 80mmol) was dissolved in 200mL acetonitrile (MeCN) solution, and then 9H-carbazole (16.0 g, 96mmol), potassium phosphate (39g, 184mmol), and cuprous oxide (2.3g, 16mmol) to obtain a mixed solution, which was stirred and reacted at 90°C for 8 hours. Stop the reaction and cool to room temperature, filter, and wash the solid three times with distilled water. The crude product is separated by silica gel column chromatography using n-hexane as the eluent, and then dried under vacuum at 50°C for 24 hours to obtain an off-white solid benzanthracene fluorenyl blue phosphorescent host material. The yield...

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Abstract

The invention belongs to the field of organic electroluminescent materials, and discloses a benzanthracene fluorenyl blue-light phosphorescent host material, a preparing method thereof and applications of the material. The structure formula of the material is shown in the specification. In the material, carbazole is a N-heteroaromatic structure and is an excellent hole transporting unit; and anthracene has a high fluorescence quantum yield, thus largely improving the triplet state energy level of the material and effectively preventing energy from being returned to the host material in a luminescent process, so that the light efficiency is increased.

Description

technical field [0001] The invention relates to the field of organic electroluminescent materials, in particular to an anthrafluorenyl blue-light 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, 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06C07D209/86H01L51/54
Inventor 周明杰张振华王平钟铁涛
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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