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Organic iridium complex as well as preparation method and application thereof

An iridium metal complex, organic technology, applied in indium organic compounds, platinum group organic compounds, organic chemistry, etc., can solve the problems of thermal stability, luminous efficiency, color purity and device life gap of red electrophosphorescent devices, etc. To achieve the effect of improving thermal stability, high product purity, and lower driving voltage

Inactive Publication Date: 2020-07-31
JILIN OPTICAL & ELECTRONICS MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, compared with green light devices, red electrophosphorescent devices have a large gap in thermal stability, luminous efficiency, color purity and device life, which has been a very challenging problem so far.

Method used

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  • Organic iridium complex as well as preparation method and application thereof
  • Organic iridium complex as well as preparation method and application thereof
  • Organic iridium complex as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] An organic iridium metal complex C001, the specific synthesis steps are as follows:

[0046] 1) Under the system of nitrogen as protective gas, accurately weigh A1 (90.4mmol, 20g), IrCl 3 ·3H 2 O (30.13mmol, 10.6g) was put into the reaction system, then a mixed solution was added: purified water (133mL) and ethylene glycol ether (400mL), and nitrogen gas was continued to reflux for 24 hours. After the reaction stopped, the system was cooled to room temperature. A large number of precipitates were precipitated, and the precipitates were suction-filtered, washed and dried with water, absolute ethanol, and petroleum ether in sequence to obtain an orange-red powdery bridging ligand B1 (14 g, yield 69.5%);

[0047] 2) Weigh the bridging ligand B1 (10.5mmol, 14g), add 6.7g of ligand C (3,7-diethyl-4,6-nonanedione), and then add 400mL of ethylene glycol ether to the system and potassium carbonate (14.5g), under nitrogen protection, stirred at 120°C for 24 hours, suction filt...

Embodiment 2

[0058] A kind of organic iridium metal complex C005, concrete synthetic steps are as follows:

[0059] 1) Under the system of nitrogen as protective gas, accurately weigh A5 (84.3mmol, 20g), IrCl 3 ·3H 2 O (28mmol, 9.9g) was put into the reaction system, and then the mixed solution was added: purified water (133mL) and ethylene glycol ether (400mL), and nitrogen gas was continued to reflux for 24 hours. After the reaction stopped, the system was cooled to room temperature, and a large amount of Precipitation was precipitated, and the precipitate was suction-filtered, washed and dried with water, absolute ethanol, and petroleum ether in sequence to obtain an orange-red powdery bridging ligand B5 (14 g, yield 71%);

[0060] 2) Weigh the bridging ligand B5 (10mmol, 14g), add 6.4g of ligand C (3,7-diethyl-4,6-nonanedione), then add 400mL of ethylene glycol ethyl ether and Potassium carbonate (13.8g), under the protection of nitrogen, stirred at 120°C for 24 hours, suction filter...

Embodiment 3

[0071] A kind of organic iridium metal complex C020, concrete synthetic steps are as follows:

[0072] 1) Under the system of nitrogen as protective gas, accurately weigh A20 (84.3mmol, 20g), IrCl 3 ·3H 2 O (28mmol, 9.9g) was put into the reaction system, and then the mixed solution was added: purified water (133mL) and ethylene glycol ether (400mL), and nitrogen gas was continued to reflux for 24 hours. After the reaction stopped, the system was cooled to room temperature, and a large amount of Precipitation was precipitated, and the precipitate was suction-filtered, washed and dried with water, absolute ethanol, and petroleum ether in sequence to obtain an orange-red powdery bridging ligand B20 (14 g, yield 71%);

[0073] 2) Weigh the bridging ligand B20 (11mmol, 15g), add 6.4g of ligand C (3,7-diethyl-4,6-nonanedione), then add 400mL of ethylene glycol ethyl ether and Potassium carbonate (13.8g), under nitrogen protection, stirred at 120°C for 24 hours, suction filtered, ...

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Abstract

The invention relates to the technical field of red light emitting materials, and particularly discloses an organic iridium complex as well as a preparation method and application thereof. The organiciridium complex has a structure shown in the specification. The wavelength of the organic iridium complex with a novel structure is by combining with a specific heterocyclic ligand, and after the organic iridium complex is applied an organic electroluminescent device, the luminous efficiency and the brightness of the device are improved. The provided preparation method has the characteristics ofsimple synthesis steps, simple post-treatment and high product purity, and solves the problems that the luminous efficiency of an existing red light emitting material is not high and the thermal stability needs to be improved.

Description

technical field [0001] The invention relates to the technical field of red light emitting materials, in particular to an organic iridium metal complex with a diketone compound as an auxiliary ligand, a preparation method thereof, and an application of the complex in organic electroluminescent devices. Background technique [0002] With the development of science and technology, organic electrophosphorescent materials have become a hot spot in the field of electroluminescence research in recent years, because organic electrophosphorescent materials can use singlet and triplet excitons at the same time, and their luminous quantum efficiency can reach 100 theoretically. %. At the same time, iridium complexes have also become the most concerned electrophosphorescent materials due to their advantages such as high photoluminescence efficiency, short excited state lifetime, and the ability to obtain red, green, and blue three primary colors of light. [0003] However, compared wit...

Claims

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Application Information

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IPC IPC(8): C07F15/00C09K11/06H01L51/50H01L51/54
CPCC07F15/0033C09K11/06C09K2211/185H10K85/342H10K50/11H10K50/15H10K50/16H10K50/17H10K50/171H10K50/18
Inventor 王辉陈剑锋于丹阳张颖张鹤张志恒马晓宇
Owner JILIN OPTICAL & ELECTRONICS MATERIALS
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