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Organic iridium metal complex, preparation method thereof and organic electroluminescent devices

A technology of iridium metal complexes and complexes, applied in indium organic compounds, platinum group organic compounds, electric solid devices, etc., can solve the problems of late start, short life and poor thermal stability of red phosphorescent materials.

Inactive Publication Date: 2020-02-28
JILIN OPTICAL & ELECTRONICS MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the existing technology, compared with fluorescent materials, red phosphorescent materials not only start late, but also have poor thermal stability, low luminous efficiency, short life, low color saturation, etc., so far it is a very challenging problem.

Method used

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  • Organic iridium metal complex, preparation method thereof and organic electroluminescent devices
  • Organic iridium metal complex, preparation method thereof and organic electroluminescent devices
  • Organic iridium metal complex, preparation method thereof and organic electroluminescent devices

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] An organic iridium metal complex B001, the specific synthesis steps are as follows:

[0053] 1) Under nitrogen protection system, weigh a-1 (90.8mmol, 20g), IrCl 3 ·3H 2 O (30.3mmol, 7.05g) was put into the reaction system, a mixed solution of 400mL ethylene glycol ether and 133mL purified water was added, and the reaction was refluxed under nitrogen protection (120°C) for 24 hours. After the reaction stopped, the system was cooled to room temperature, and there was precipitation. Precipitation, suction filtration of the precipitate, washing and drying with water, absolute ethanol and petroleum ether in sequence to obtain the bridging ligand b-1 (15.3 g, yield 75.8%) in the form of orange-red powder;

[0054] MW theoretical value: 1332.3, test value: 1330.2;

[0055] 2) Weigh orange-red powder bridging ligand b-1 (11.3mmol, 15g), add 7.2g of ligand 3,7-diethyl-4,6-dione c-1, and add to the system Add 400mL of ethylene glycol ether and 15.6g of potassium carbonate, un...

Embodiment 2

[0066] An organic iridium metal complex B109, the specific synthesis steps are as follows:

[0067] 1) Under nitrogen protection system, weigh a-109 (76.23mmol, 20g), IrCl 3 ·3H 2 O (25.4mmol, 8.9g) was put into the reaction system, a mixed solution of 400mL ethylene glycol ethyl ether and 133mL purified water was added, refluxed under nitrogen protection (120°C) for 24 hours, and then cooled to room temperature, a precipitate was precipitated, and the precipitate was Suction filtration, washing and drying with water, absolute ethanol and petroleum ether in sequence to obtain the bridging ligand b-109 (14.2 g, yield 74.5%) in the form of red powder;

[0068] MW theoretical value: 1500.7, test value: 1498.4;

[0069] 2) Weigh the red powder bridging ligand b-109 (9.3mmol, 14g), add 3.6g ligand heptane-3,5-dione c-109, then add 400mL ethylene glycol ether to the system and 12.9g of potassium carbonate, under nitrogen protection, stirred at 120°C for 24 hours, suction filtered...

Embodiment 3

[0080] An organic iridium metal complex B117, the specific synthesis steps are as follows:

[0081] 1) Under nitrogen protection system, weigh a-117 (96.9mmol, 20g), IrCl 3 ·3H 2 O (32.3mmol, 11.4g) was put into the reaction system, a mixed solution of 400mL ethylene glycol ethyl ether and 133mL pure water was added, refluxed under nitrogen protection (120°C) for 24 hours, and then cooled to room temperature, a precipitate was precipitated, and the precipitate was Suction filtration, washing and drying with water, absolute ethanol and petroleum ether in sequence to obtain bridged ligand b-117 (14.9 g, yield 72%) of orange-red powder;

[0082] MW theoretical value: 1276.2; test value: 1274.1;

[0083] 2) Weigh the bridging ligand b-117 (11.4mmol, 14.5g) of the orange-red powder, add 3.4g of the ligand pentane-2,4-dione c-117, and then add 400mL of ethylene glycol to the system Diethyl ether and 15.4g potassium carbonate were stirred at 120°C for 24 hours under the protection...

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Abstract

The invention provides an organic iridium metal complex, a preparation method thereof and organic electroluminescent devices. The organic iridium metal complex is shown as chemical formula 1, the wavelength of a compound can be adjusted by selecting specific heterocyclic ligand combination, and after the obtained organic iridium metal complex is used for the organic electroluminescent devices, therequired driving voltage of the organic electroluminescent devices is low, and the light-emitting efficiency is improved; the preparation method of the organic iridium metal complex provided by the invention has the advantages of simple synthesis steps, easy product purification, high purity and high yield.

Description

technical field [0001] The invention relates to the technical field of photoelectric materials, in particular to an organic iridium metal complex, a preparation method thereof and an organic electroluminescence device. Background technique [0002] Organic light-emitting materials refer to organic substances that can absorb energy in a certain way and convert it into light energy. They play a very important role in modern electronic display technology. [0003] The organic light-emitting material that has attracted the most attention from the scientific and industrial circles is OLED (organic light-emitting diode), which was discovered in the laboratory by Dr. Deng Qingyun, a Chinese-American scientist, in 1979. [0004] Organic electroluminescent devices (OLEDs) have experienced nearly three decades of development and have now entered the stage of commercialization. Organic light-emitting materials are the core technology of organic electroluminescent devices, and are also...

Claims

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Application Information

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IPC IPC(8): C07F15/00C09K11/06H01L51/50H01L51/54
CPCC07F15/0033C09K11/06C09K2211/185H10K85/342H10K50/171H10K50/18H10K50/16H10K50/15H10K50/17H10K50/11
Inventor 王辉陈剑锋陈明李明刘锟张颖马晓宇
Owner JILIN OPTICAL & ELECTRONICS MATERIALS
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