Dendritic main body material and organic electroluminescence device prepared from the same

A technology of electroluminescent devices and main materials, which is applied in the direction of electroluminescent light sources, electric light sources, electrical components, etc., and can solve problems such as device efficiency reduction

Active Publication Date: 2008-04-23
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Otherwise, the triplet energy would be transferred from the phosphorescent material to the host material and released in a non-radiative decay, resulting in a decrease in device efficiency

Method used

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  • Dendritic main body material and organic electroluminescence device prepared from the same
  • Dendritic main body material and organic electroluminescence device prepared from the same
  • Dendritic main body material and organic electroluminescence device prepared from the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Embodiment 1: the synthesis of the compound of chemical formula (2)

[0058] Reaction 1:

[0059]

[0060] Under nitrogen protection, compound 3.1g (5.0mmol) of chemical formula (8), peripheral branch D 1 4.6g (16.5mmol), potassium carbonate 4.2g (30.0mmol), cuprous iodide 300mg (1.5mmol), 18-crown-6 211mg (0.8mmol) and 1,3-dimethyl-3,4,5 , a mixture of 2 mL of 6-tetrahydro-2-pyrimidinone (DMPU) was heated to 170 ° C, reacted for 24 hours, neutralized the remaining potassium carbonate with dilute hydrochloric acid, extracted with dichloromethane, washed with ammonia water to remove copper ions, and washed with saturated saline until medium properties, dried over anhydrous sodium sulfate, and the solvent was evaporated by rotary evaporation under reduced pressure, followed by column separation to obtain 4.4 g of the compound of chemical formula (2), with a yield of 82%.

Embodiment 2

[0061] Embodiment 2: the synthesis of the compound of chemical formula (3)

[0062] Reaction 2:

[0063]

[0064] Under nitrogen protection, the compound 1.6g (2.5mmol) of chemical formula (8), the peripheral branch D 2 5.9g (8.2mmol), potassium carbonate 2.1g (15.0mmol), cuprous iodide 150mg (0.75mmol), 18-crown-6 106mg (0.4mmol) and 1,3-dimethyl-3,4,5 , a mixture of 5 mL of 6-tetrahydro-2-pyrimidinone (DMPU) was heated to 190°C, reacted for 48 hours, neutralized the remaining potassium carbonate with dilute hydrochloric acid, extracted with dichloromethane, washed with ammonia water to remove copper ions, and washed with saturated saline until medium properties, dried over anhydrous sodium sulfate, and the solvent was evaporated by rotary evaporation under reduced pressure, followed by column separation to obtain 3.3 g of the compound of chemical formula (3), with a yield of 55%.

Embodiment 3

[0065] Embodiment 3: the synthesis of the compound of chemical formula (4)

[0066] Reaction 3:

[0067]

[0068] Under the protection of nitrogen, the compound 3.3g (5.0mmol) of chemical formula (9), the peripheral branch D 1 4.6g (16.5mmol), potassium carbonate 4.2g (30.0mmol), cuprous iodide 300mg (1.5mmol), 18-crown-6 211mg (0.8mmol) and 1,3-dimethyl-3,4,5 , a mixture of 2 mL of 6-tetrahydro-2-pyrimidinone (DMPU) was heated to 170 ° C, reacted for 24 hours, neutralized the remaining potassium carbonate with dilute hydrochloric acid, extracted with dichloromethane, washed with ammonia water to remove copper ions, and washed with saturated saline until medium properties, dried over anhydrous sodium sulfate, and the solvent was evaporated by rotary evaporation under reduced pressure, followed by column separation to obtain 3.4 g of the compound of chemical formula (4), with a yield of 61%.

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Abstract

The present invention relates to one kind of dendrite compound and its organic electroluminescence device, and belongs to the field of organic electroluminescence technology. The compound consists of three parts, including one middle nucleus, one dendrite of carbazole unit, and one surface group. The dendrite molecule with dendrite of carbazole possessing hole transporting capacity has excellent carrier transporting capacity. At the same time, it has high form stability and high triplet state energy level, so that it may be applied as the main phosphorescence material, especially blue light phosphorescence material, in organic electroluminescence device. The made electroluminescence device has maximum light emitting efficiency of 8.6 cd / A, maximum power efficiency of 4.1 lm / W, maximum brightness of 6450 cd / sq m, and color coordinate CIE values x=0.15 and y=0.30.

Description

technical field [0001] The invention belongs to the technical field of organic electroluminescence, and relates to a dendritic host material and an organic electroluminescence device prepared by the compound. technical background [0002] Organic electroluminescence materials and devices are the international frontier research field. At present, many organic electroluminescent materials have been commercialized, and some organic display devices have also been applied in mobile phones, car audio and so on. [0003] According to different luminescent principles, organic electroluminescent materials can be divided into two categories: fluorescent materials and phosphorescent materials. For phosphorescent materials, since all energy forms including singlet and triplet states can be fully utilized, the efficiency of the device can be greatly improved, and the internal quantum efficiency of the device can theoretically reach 100%. Therefore, the use of transition metal complexes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D209/82C09K11/06H05B33/14
Inventor 王利祥丁军桥吕剑虹程延祥
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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