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 problems such as poor stability, luminous color purity, luminous efficiency, insufficient attenuation of device efficiency, and short life, so as to reduce self-quenching phenomenon, Low processing cost, effect of improving 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
Comparison scheme
Effect test

preparation example Construction

[0049] see figure 2 , the preparation method of the above-mentioned blue light organic electrophosphorescent material iridium metal complex, comprising the following steps:

[0050] Compound A and compound B represented by the following structural formula are provided respectively:

[0051]

[0052] Wherein, R is a hydrogen atom, an alkyl group or an alkoxy group;

[0053] Under the condition of catalyst, alkali and organic solvent, compound A and compound B are heated to carry out Suzuki coupling reaction, obtain ring metal ligand, then described ring metal ligand and Ir(acac) 3 Polymerization is carried out in glycerol or 2-ethoxyethanol to prepare a blue-light organic electrophosphorescent material iridium metal complex with the structural formula shown in formula (1):

[0054]

[0055] Wherein, R is a hydrogen atom, an alkyl group or an alkoxy group.

[0056] Compound A and Compound B can be directly purchased from the market or prepared by existing synthetic met...

Embodiment 1

[0073] Example 1: A blue-light organic electrophosphorescent material iridium metal complex tris(3-(3',5'-difluoro-4'-trifluoromethylphenyl)pyridazine-N,C 2 ') iridium, as shown in the following structural formula:

[0074]

[0075] The preparation method of the above-mentioned blue light organic electrophosphorescent material iridium metal complex comprises the following steps:

[0076] (1) Provide compound A1 and compound B represented by the following structural formula respectively:

[0077]

[0078] (2) Synthesis of cyclometal ligand 3-(3’,5’-difluoro-4’-trifluoromethylphenyl)pyridazine

[0079]

[0080] Under nitrogen protection, 3.18g (20mmol) of compound A1 (3-bromopyridazine), 5.42g (24mmol) of compound B (3,5-difluoro-4-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

[0098] Example 2: A blue-light organic electrophosphorescent material iridium metal complex tris(3-(3',5'-difluoro-4'-trifluoromethylphenyl)-6-methylpyridazine-N, C 2 ') iridium, as shown in the following structural formula:

[0099]

[0100] The preparation method of the above-mentioned blue light organic electrophosphorescent material iridium metal complex comprises the following steps:

[0101] (1) Provide compound A2 and compound B represented by the following structural formula respectively:

[0102]

[0103] (2) Synthesis of cyclometal ligand 3-(3',5'-difluoro-4'-trifluoromethylphenyl)-6-methylpyridazine

[0104]

[0105] Under nitrogen protection, 3.46g (20mmol) of compound A2 (3-bromo-6-methylpyridazine), 4.52g (20mmol) of compound B (3,5-difluoro-4-trifluoromethyl) were added to the reactor phenylboronic acid), 80mL toluene, 20mL water, 3.22g (10mmol) tetrabutylammonium bromide (TBTA), 1.06g (10mmol) anhydrous sodium carbonate, 0.023g (0.02mmol) tetrakis (...

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Abstract

The invention provides a blue organic electroluminescent phosphorescent material-iridium metal complex shown in a structural formula (I) in the specification. In the structural formula (I), R is a hydrogen atom, alkyl or alkoxy. A preparation method of the iridium metal complex comprises the following steps: preparing a cyclo-metal ligand through Suzuki coupling reaction; then subjecting the cyclo-metal ligand and Ir(acac)3 to polymerization reaction, thus obtaining the blue organic electroluminescent phosphorescent material-iridium metal complex shown in the structural 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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Patent Type & Authority Applications(China)
IPC IPC(8): C07F15/00C09K11/06H01L51/54
Inventor 周明杰王平张娟娟张振华
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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