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Blue organic electroluminescent phosphorescent material-iridium metal complex, preparation method thereof and organic electroluminescence device

A technology of iridium metal complexes and phosphorescent materials, which is applied in the field of organic electroluminescence, can solve the problems of luminous color purity, luminous efficiency, insufficient attenuation of device efficiency, poor stability, and short life, and achieve good energy transmission efficiency and processing Effect of low cost and improvement of luminous performance

Inactive Publication Date: 2014-05-21
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

However, the current blue phosphorescent materials have insufficient luminous color purity, luminous efficiency, and device efficiency attenuation, and have poor stability and short lifetime.

Method used

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  • Blue organic electroluminescent phosphorescent material-iridium metal complex, preparation method thereof and organic electroluminescence device
  • Blue organic electroluminescent phosphorescent material-iridium metal complex, preparation method thereof and organic electroluminescence device
  • Blue organic electroluminescent phosphorescent material-iridium metal complex, preparation method thereof and organic electroluminescence device

Examples

Experimental program
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preparation example Construction

[0046] see figure 2 , the preparation method of the above-mentioned blue light organic electrophosphorescent material iridium metal complex, comprising the following steps:

[0047] S10: respectively provide compound A and compound B represented by the following structural formula:

[0048]

[0049] Wherein, R is a hydrogen atom, an alkyl group or an alkoxy group;

[0050] S20: Under the conditions of catalyst, base and organic solvent, compound A and compound B are heated to perform Suzuki coupling reaction to obtain a ring metal ligand;

[0051] S30: Polymerize the ring metal ligand obtained in step S20 with iridium acetylacetonate in glycerol or 2-ethoxyethanol to obtain a blue-light organic electrophosphorescent material iridium with the structural formula shown in formula (1) Metal complexes:

[0052]

[0053] Wherein, R is a hydrogen atom, an alkyl group or an alkoxy group.

[0054] In step S10, compound A and compound B can be directly purchased from the mark...

Embodiment 1

[0071] Example 1: A blue-light organic electrophosphorescent material iridium metal complex tris(3-(4',6'-difluoro-5'-trifluoromethylphenyl)pyridazine-N,C 2 ') iridium, as shown in the following structural formula:

[0072]

[0073] The preparation method of the above-mentioned blue light organic electrophosphorescent material iridium metal complex comprises the following steps:

[0074] (1) Provide compound A1 and compound B represented by the following structural formula respectively:

[0075]

[0076] (2) Synthesis of cyclometal ligand 3-(2’,4’-difluoro-3’-trifluoromethylphenyl)pyridazine

[0077]

[0078] Under nitrogen protection, 3.18g (20mmol) of compound A1 (3-bromopyridazine), 5.42g (24mmol) of compound B (2,4-difluoro-3-trifluoromethylphenylboronic acid), 80mL toluene, 20mL water, 3.22g (10mmol) tetrabutylammonium bromide (TBTA), 5.53g (40mmol) anhydrous potassium carbonate, 0.23g (0.2mmol) tetrakis (triphenylphosphine) palladium, stirred and heated To re...

Embodiment 2

[0096] Example 2: A blue-light organic electrophosphorescent material iridium metal complex tris(3-(4',6'-difluoro-5'-trifluoromethylphenyl)-6-methylpyridazine-N, C 2 ') iridium, as shown in the following structural formula:

[0097]

[0098] The preparation method of the above-mentioned blue light organic electrophosphorescent material iridium metal complex comprises the following steps:

[0099] (1) Provide compound A2 and compound B represented by the following structural formula respectively:

[0100]

[0101] (2) Synthesis of cyclometal ligand 3-(2’,4’-difluoro-3’-trifluoromethylphenyl)-6-methylpyridazine

[0102]

[0103] Under nitrogen protection, 3.46g (20mmol) of compound A2 (3-bromo-6-methylpyridazine), 5.42g (24mmol) of compound B (2,4-difluoro-3-trifluoromethyl) were added to the reactor Phenylboronic acid), 80mL toluene, 20mL water, 3.22g (10mmol) tetrabutylammonium bromide, 5.53g (40mmol) anhydrous potassium carbonate, 0.023g (0.02mmol) tetrakis (trip...

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Abstract

The invention provides a blue organic electroluminescent phosphorescent material-iridium metal complex with a structural formula shown in a formula (I) in the specification. In the formula (I), R is a hydrogen atom, alkyl or alkoxy. A preparation method of the iridium metal complex comprises the following steps: firstly preparing a cyclo-metal ligand through Suzuki coupling reaction; then subjecting the cyclo-metal ligand and iridium (III) acetylacetonate to polymerization reaction in glycerin or 2-ethoxyethanol, thus obtaining the blue organic electroluminescent phosphorescent material-iridium metal complex with the structural formula shown in the formula (I). The material can obtain good energy transmission efficiency and proper blue light emission wavelength, can be used for preparing blue or white phosphorescent electroluminescence devices and can achieve the aims of reducing the power consumption of the devices, improving the properties of the devices and prolonging the service lives.

Description

technical field [0001] The invention belongs to the field of organic electroluminescence, and in particular relates to a blue light organic electroluminescence material iridium metal complex, a preparation method thereof and an organic electroluminescence device. Background technique [0002] An organic electroluminescent device (OLED) is an energy conversion device that uses organic materials as light-emitting materials and can convert applied electrical energy into light energy. It has outstanding performances such as ultra-thin, self-luminous, fast response, low power consumption, etc., and has extremely broad application prospects in display, lighting and other fields. [0003] Organic electroluminescent materials can be divided into two types: fluorescent materials and phosphorescent materials. In fluorescent electroluminescent devices, due to the limitation of spin prohibition, the excited singlet state that produces fluorescence only accounts for 25% of the total exc...

Claims

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Application Information

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IPC IPC(8): C07F15/00C09K11/06H01L51/54
CPCY02B20/00
Inventor 周明杰王平张娟娟张振华
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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