Blue organic electrophosphorescent material iridium complex and its preparation method and organic electroluminescent device

A technology of iridium metal complexes and phosphorescent materials, which is applied in the field of organic electroluminescent materials, and can solve problems such as poor blue light color purity

Inactive Publication Date: 2015-09-02
OCEANS KING LIGHTING SCI&TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Bis(4,6-difluorophenylpyridine-N,C2) pyridine iridium iridium (FIrpic) is currently the most reported blue-light organic electrophosphorescent material with the best comprehensive performance. Various optimizations have greatly improved the performance of the device, but the biggest weakness of FIrpic is that the blue light emitted by FIrpic is sky blue, and the color purity of the blue light is not good. ), which has a large gap with the standard Blu-ray CIE (0.137,0.084)

Method used

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  • Blue organic electrophosphorescent material iridium complex and its preparation method and organic electroluminescent device
  • Blue organic electrophosphorescent material iridium complex and its preparation method and organic electroluminescent device
  • Blue organic electrophosphorescent material iridium complex and its preparation method and organic electroluminescent device

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preparation example Construction

[0027] The preparation method of the above-mentioned blue light organic electrophosphorescent material iridium metal complex comprises the following steps:

[0028] S1. Under inert gas (at least one of nitrogen and argon, the same below), the compound C, whose structural formula is Add compound D to iridium trichloride trihydrate into 2-ethoxyethanol aqueous solution at a molar ratio of 2.2 to 3:1, heat to 100 to 135°C and stir for 22 to 25 hours to obtain the compound A; Wherein, the volume ratio of 2-ethoxyethanol to water in the 2-ethoxyethanol aqueous solution is 3:1; the concentration range of the compound D in the 2-ethoxyethanol aqueous solution is 0.1~ 0.133mol / L;

[0029] S2, under the protection of inert gas, the structural formula is The compound A and the structural formula are Compound B is dissolved in the first organic solvent containing a base catalyst, and reacted at a temperature of 40-100° C. for 7-20 hours. After the reaction is stopped, the reaction ...

Embodiment 1

[0042] Example 1: Complex bis[1-(1',3'-diisopropyldibenzo[b,d]furan-2'-yl)-2-(4',6'-difluorophenyl )-1H-imidazole-N,C 2 '](5-(pyridin-2'-yl)-1,2,3,4-tetrazole)synthesis of iridium

[0043] (1) The main ligand is 1-(1',3'-diisopropyldibenzo[b,d]furan-2'-yl)-2-(2',4'-difluorophenyl) Synthesis of iridium-containing dichloro dimers of -1H-imidazole

[0044]

[0045] Under the protection of nitrogen atmosphere, 0.71g (2mmol) iridium trichloride trihydrate and 2.15g (5mmol) 1-(1',3'-diisopropyldibenzo[b,d]furan-2'-yl )-2-(2',4'-difluorophenyl)-1H-imidazole was dissolved in 15mL of 2-ethoxyethanol / water mixed solvent with a volume ratio of 3:1, and the reaction system was heated to a temperature of 120°C The reaction was stirred for 24h. Stop heating, and after the reaction system is naturally cooled to room temperature, pour the mixed solution into 20 mL of distilled water, if precipitation is formed, stir thoroughly. Filter and wash the precipitate with distilled water, eth...

Embodiment 2

[0057] Example 2: Complex bis[1-(1',3'-diisopropyldibenzo[b,d]furan-2'-yl)-2-(5',6'-difluorophenyl )-1H-imidazole-N,C 2 '](5-(pyridin-2'-yl)-1,2,3,4-tetrazole)synthesis of iridium

[0058] (1) The main ligand is 1-(1',3'-diisopropyldibenzo[b,d]furan-2'-yl)-2-(2',3'-difluorophenyl) Synthesis of iridium-containing dichloro dimers of -1H-imidazole

[0059]

[0060] Under the protection of nitrogen atmosphere, 0.71g (2mmol) iridium trichloride trihydrate and 2.58g (6mmol) 1-(1',3'-diisopropyldibenzo[b,d]furan-2'-yl )-2-(2',3'-difluorophenyl)-1H-imidazole was dissolved in 20mL of 2-ethoxyethanol / water mixed solvent with a volume ratio of 3:1, and the reaction system was heated to 100°C The reaction was stirred for 25h. Stop heating, and after the reaction system is naturally cooled to room temperature, pour the mixed solution into 20 mL of distilled water, if precipitation is formed, stir thoroughly. Filter and wash the precipitate with distilled water, ethanol and n-hexane...

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Abstract

The invention discloses a blue organic electrophosphorescent material iridium complex and its preparation method and an organic electroluminescent device. The blue organic electrophosphorescent material iridium complex has a general structural formula shown in the description. 1-(1',3'-diisopropyldibenzo[b,d]furyl-2'-yl)-2-phenyl-1H-imidazole as a ring metal main ligand and strong field ligand 5-(pyridyl-2'-yl)-1,2,3,4-tetrazole as an auxiliary ligand are synthesized into the blue organic electrophosphorescent material iridium complex. Through chemical modification of the 1-(1',3'-diisopropyldibenzo[b,d]furyl-2'-yl)-2-phenyl-1H-imidazole as a ring metal main ligand, material luminescence color adjustment is realized and emission of phosphorescence with more blue light wavelength is realized.

Description

technical field [0001] The invention relates to an organic electroluminescent material, in particular to a blue-light organic electroluminescent material iridium metal complex, a preparation method thereof and an organic electroluminescent device. Background technique [0002] Organic electroluminescence refers to a luminescence phenomenon in which organic materials directly convert electrical energy into light energy under the action of an electric field. In the early days, the research on organic electroluminescence was stagnant because of the high driving voltage and low luminous efficiency of organic electroluminescent devices. Until 1987, people such as Tang of American Kodak Company invented 8-hydroxyquinoline aluminum (Alq 3 ) is a light-emitting material, and a uniform and dense high-quality thin film is made with aromatic diamines, and an organic electroluminescent device with low operating voltage, high brightness, and high efficiency is prepared, which opens a ne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F15/00C09K11/06H01L51/54
CPCC09K11/06C07F15/0033C09K2211/1044C09K2211/1074C09K2211/1088C09K2211/185C09K2211/1029H10K85/653H10K85/30H10K85/654H10K50/00
Inventor 周明杰王平张娟娟冯小明
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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