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Phosphorescent material, preparation method thereof and organic electroluminescent device containing phosphorescent material

A phosphorescent material, C6-C60 technology, applied in the field of organic light-emitting materials, can solve the problems of high synthesis price of phosphorescent materials, high synthesis process requirements, easy to pollute the environment, etc., to achieve improved luminous efficiency, improved efficiency and life, and easy access to raw materials Effect

Active Publication Date: 2019-12-27
JILIN OPTICAL & ELECTRONICS MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the relatively high synthesis price of phosphorescent materials, the synthesis process requirements are relatively high, and it is easy to pollute the environment during the synthesis process, the purification requirements are relatively high, the life is short, and the efficiency is low.

Method used

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  • Phosphorescent material, preparation method thereof and organic electroluminescent device containing phosphorescent material
  • Phosphorescent material, preparation method thereof and organic electroluminescent device containing phosphorescent material
  • Phosphorescent material, preparation method thereof and organic electroluminescent device containing phosphorescent material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Example 1: Compound PD10

[0047]

[0048] Synthesis of intermediate 10-3

[0049]

[0050] Accurately weigh 20 grams (67.8 mmol) of triphenylchlorosilane and add it to the reaction flask, 300 mL of toluene, 150 mL of ethanol, 150 mL of deionized water, nitrogen protection, and stir for 30 minutes, then add the raw material 2-phenylpyridine (4 - boric acid) 16.2 g (81.4 mmol) and catalyst Pd (PPh 3 ) 40.6 g (0.678 mol), potassium carbonate 18.57 g (134.6 mmol), heated to 90 ° C for 24 hours.

[0051] Post-treatment process: TLC monitoring until the reaction is complete. The temperature was lowered, the liquid was separated at rest, and the water layer was separated to keep the toluene layer. Add another 150 mL of water to wash the toluene layer once, separate the layers, dry the toluene layer, spin dry the toluene to obtain a dark solid. After passing through a silica gel column, first use dichloromethane: petroleum ether = 1:4 about 500mL to wash out the imp...

Embodiment 2

[0068] Example 2: Compound PD25

[0069]

[0070] Intermediate 25-8 was synthesized according to the method of Example 1.

[0071] Add 12.87g (10.0mmol) of intermediate 25-8 into a three-necked flask, then add 150mL of absolute ethanol and 5.22g (20.0mmol) of intermediate 25-6, and stir the reaction at 90°C for 24 hours, and a large amount of solids precipitate out. TLC monitoring showed that the basic reaction of raw materials was completed. After suction filtration, the target product was obtained, rinsed with about 50 mL of petroleum ether, and dried to obtain 9.2 g of the product, with a yield of 72%, and the measured HPLC was 99%. MW: 1277.52.

Embodiment 3

[0072] Example 3: Compound PD34

[0073]

[0074] Add 12.87g (10.0mmol) of intermediate 34-8 into a three-necked flask, then add 150mL of absolute ethanol and 6.18g (20mmol) of intermediate 34-6, and stir the reaction at 90°C for 24 hours, and a large amount of solids precipitate out.

[0075] TLC monitoring showed that the basic reaction of raw materials was completed. After suction filtration, the target product was obtained, rinsed with about 50 mL of petroleum ether, and dried to obtain 10.34 g of product PD34, with a yield of 78%, and a HPLC value of 99%. MW: 1325.41.

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Abstract

The invention relates to a phosphorescent material and an organic light-emitting device containing the same, and relates to the field of organic light-emitting materials. The structural formula of thephosphorescent material is as shown in the chemical formula 1. According to the phosphorescent material provided by the invention, a specific heterocyclic ligand is selected for coordination, then the wavelength of the compound is adjusted; so that when the obtained organometallic compound is used for an organic light-emitting device, the light-emitting efficiency of the device is improved, and the service life of the device is long. The phosphorescent material disclosed by the invention can be applied to an OLED light emitting device, and compared with a contrast, the voltage, the efficiencyand the service life are improved compared with those of an existing OLED material.

Description

technical field [0001] The invention relates to the field of organic luminescent materials, in particular to a phosphorescent material, a preparation method thereof and an organic electroluminescent device containing the material. Background technique [0002] An OLED display is a display made of organic light-emitting diodes. Due to its self-illumination, no need for backlight, high contrast, thin thickness, wide viewing angle, fast response, flexible panels, wide operating temperature range, simple structure and manufacturing process, etc., it is considered to be the next generation. Emerging application technologies of flat panel displays. [0003] Since the discovery of phosphorescence, it has been pursued by everyone, because the luminous efficiency of phosphorescent materials is significantly higher than that of fluorescent materials, and it has greater advantages compared with traditional fluorescent materials as light-emitting devices, because it can simultaneously ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F15/00C09K11/06H01L51/54H01L51/50
CPCC07F15/0033C09K11/06C09K2211/185C09K2211/1029C09K2211/1092C09K2211/1088H10K85/40H10K85/342H10K50/12
Inventor 马晓宇王永光李贺毕岩杨冰白金凤汪康
Owner JILIN OPTICAL & ELECTRONICS MATERIALS
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