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Organic electroluminescent material, preparation method thereof and organic electroluminescent device

A technology of electroluminescent materials and electroluminescent devices, which is applied in the direction of luminescent materials, electric solid devices, electrical components, etc., can solve the problems of short excited state life, low current efficiency, high driving voltage, etc., and achieve simple synthesis steps and solve The effect of high price and lower driving voltage

Active Publication Date: 2020-12-15
奥来德(上海)光电材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] As a high-profile phosphorescent material, organic electroluminescent materials have short excited state lifetimes, high quantum efficiency, and the luminescent color of complex molecules can be easily adjusted by modifying ligands. They are the most promising OLED luminescent materials. materials; however, the current organic electroluminescent materials used in organic electroluminescent devices have problems such as high driving voltage and low current efficiency

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  • Organic electroluminescent material, preparation method thereof and organic electroluminescent device
  • Organic electroluminescent material, preparation method thereof and organic electroluminescent device
  • Organic electroluminescent material, preparation method thereof and organic electroluminescent device

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Embodiment 1

[0048] The material embodiment provides an organic electroluminescent material, whose chemical structural formula is formula I-005 in the summary of the invention, and the reaction scheme of the preparation method of the organic electroluminescent material is as follows:

[0049]

[0050] Step 1: Weigh ligand A-005 (47.36mmol, 10g), IrCl3 ·3H 2 O (18.94mmol, 6.67g), ethylene glycol ether (150mL), water (50mL) joins reaction system respectively, under N 2 Heated to reflux for 24 hours under protection, and then cooled to room temperature. A precipitate was precipitated, filtered under reduced pressure, rinsed with absolute ethanol and petroleum ether in sequence, and dried to obtain 11.16 g of bridging ligand B-005. The rate is 91%;

[0051] Step 2: Weigh the bridging ligand B-005 (8.48mmol, 11g), K 2 CO 3 (26mmol, 3.60g), ethylene glycol ether (50mL) joins reaction system respectively, under N 2 Add ligand C-005 (as shown in Formula 5) (25.44mmol, 5.7g) under protection...

Embodiment 2

[0057] This embodiment provides an organic electroluminescent material whose chemical structural formula is formula I-007 in the summary of the invention. The reaction scheme of the preparation method of the organic electroluminescent material is as follows:

[0058]

[0059] Its specific preparation method comprises the following steps:

[0060] Step 1: Weigh ligand A-007 (50.73mmol, 10g), IrCl 3 ·3H 2 O (20.29mmol, 7.16g), ethylene glycol ether (150mL), water (50mL) joins reaction system respectively, under N 2 Heated to reflux for 24 hours under protection, and then cooled to room temperature. Precipitates were precipitated, filtered under reduced pressure, rinsed with absolute ethanol and petroleum ether in sequence, and dried to obtain 11.33 g of bridging ligand B-007. The rate is 90.1%;

[0061] Step 2: Weigh the bridging ligand B-007 (8.86mmol, 11g), K 2 CO 3 (26mmol, 3.60g), ethylene glycol ether (50mL) joins reaction system respectively, under N 2 Add ligand ...

Embodiment 3

[0067] This embodiment provides an organic electroluminescent material whose chemical structural formula is formula I-020 in the summary of the invention. The reaction scheme of the preparation method of the organic electroluminescent material is as follows:

[0068]

[0069] Its specific preparation method comprises the following steps:

[0070] Step 1: Weigh ligand A-020 (36.58mmol, 10g), IrCl 3 ·3H 2 O (14.63mmol, 5.15g), ethylene glycol ether (150mL), water (50mL) joins reaction system respectively, under N 2 Heated to reflux for 24 hours under protection, and then cooled to room temperature. A precipitate was precipitated, filtered under reduced pressure, rinsed with absolute ethanol and petroleum ether in sequence, and dried to obtain the bridging ligand B-020 with a mass of 10.2 g. The yield is 90.3%;

[0071] Step 2: Weigh the bridging ligand B-020 (6.47mmol, 10g), K 2 CO 3 (26mmol, 3.60g), ethylene glycol ether (50mL) joins reaction system respectively, under ...

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Abstract

The invention discloses an organic electroluminescent material, a preparation method thereof and an organic electroluminescent device, and belongs to the technical field of luminescent materials. Thechemical formula of the organic electroluminescent material is Ir(L1)(L2)x(L3)y, in the structural general formula, the x and the y are both natural numbers, and the x plus the y is 2. The organic electroluminescent material provided by the invention is prepared by combining metal iridium and a specific heterocyclic ligand. After the organic electroluminescent material is applied to an organic electroluminescent device, the driving voltage of the organic electroluminescent device can be reduced, the current efficiency of the organic electroluminescent device is remarkably improved, and the service life of the organic electroluminescent device is prolonged.

Description

technical field [0001] The invention relates to the technical field of luminescent materials, in particular to an organic electroluminescent material, a preparation method thereof and an organic electroluminescent device. Background technique [0002] With the vigorous development of information technology in the 21st century, information display technology plays an important role in the development of human technology industry and the improvement of life quality. For decades, information display devices have developed from the simplest light bulb indicator light, seven-section digital display to cathode ray tube display (CRT), until now the light, small and energy-saving liquid crystal display (LCD) and plasma display (PDP) . However, although these displays have made considerable improvements and perfections to traditional technologies, they still cannot meet the urgent needs of the growing information age for lighter, thinner, and lower power-consuming high-performance f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F15/00C09K11/06H01L51/54
CPCC07F15/0033C09K11/06C09K2211/185H10K85/342Y02E10/549
Inventor 王辉高旭李明李建行姜志远赵贺马晓宇
Owner 奥来德(上海)光电材料科技有限公司
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