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Red phosphorescent macromolecular iridium complex electroluminescent material and preparation method thereof

A red phosphorescence and polymer technology, applied in red phosphorescent polymer iridium complex electroluminescent materials and related preparation fields, can solve the problems of lagging development of red light materials, difficulty in obtaining efficiency and color saturation red light materials, etc. , to achieve the effect of simple preparation method and good processability

Inactive Publication Date: 2010-06-16
NINGBO UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to obtain a full-color display, it is necessary to obtain red, green and blue materials with excellent performance at the same time. Compared with green and blue materials, the development of red materials has been lagging behind, and it is difficult to obtain high efficiency and color saturation. Excellent red light material

Method used

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  • Red phosphorescent macromolecular iridium complex electroluminescent material and preparation method thereof
  • Red phosphorescent macromolecular iridium complex electroluminescent material and preparation method thereof
  • Red phosphorescent macromolecular iridium complex electroluminescent material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] (1) Add 2.118g (1mmol) iridium chloride trihydrate, 1.05g (4.5mmol) 2-(3-methylphenyl)-7-methylquinoline in a round bottom flask, then add 90mL Ethoxyethanol and 30 mL of distilled water. Heated to 120° C. in a constant temperature oil bath under the protection of nitrogen, and stirred and refluxed for 24 hours. Cool to room temperature, filter with suction, dissolve the product with dichloromethane, and then filter with suction, distill off the dichloromethane in the filtrate, wash the obtained solid with methanol twice, and dry it under vacuum at 60°C for 24 hours to obtain a chlorine-bridged cyclometal iridium dimer. The yield was 46%.

[0037] (2) Add 0.059g (0.4mmol) of p-vinylbenzoic acid, 0.424g (4mmol) of anhydrous sodium carbonate, 0.013g (0.12mmol) of p-benzoquinone, 10mL of tetrahydrofuran and 2mL of distilled water into a round-bottomed flask. After stirring for 3 hours, the reaction was complete, and the solvent was distilled off under reduced pressure. ...

Embodiment 2

[0041] Others are the same as P1, the conjugated unsaturated carboxylic acid ligand is 2-methacrylic acid, and the red phosphorescent polymer iridium complex electroluminescent material P2 is synthesized, and the others are similar to Example 1. The yield was 58%. The number average molecular weight Mn was 4009. The maximum photoluminescence emission wavelength is 610 nm. The structure of P2 is as follows:

[0042]

Embodiment 3

[0044] Others are the same as P1, the conjugated unsaturated carboxylic acid ligand is 2-ethylacrylic acid, and the red phosphorescent polymer iridium complex electroluminescent material P3 is synthesized, and the others are similar to Example 1. The yield was 55%. The number average molecular weight Mn was 3591. The maximum photoluminescence emission wavelength is 610 nm. The P3 structure is as follows:

[0045]

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Abstract

The invention relates to a red phosphorescent macromolecular iridium complex electroluminescent material and a preparation method thereof. The preparation method comprises the following steps: reacting CN bidentate ligands of 2-phenyl substituted quinolines with iridum ions to obtain chlorine bridged cyclic metal iridium dipolymer; reacting the cyclic metal iridium dipolymer with conjugated unsaturated carboxylic acid ligands to prepare an iridium complex monomer; and finally, copolymerizing the iridium complex monomer and a charge transfer material with alkenyl to obtain the red phosphorescent macromolecular iridium complex with a structure shown in the specification. The red phosphorescent macromolecular iridium complex can serve as an organic electroluminescent material; the preparation method is simple and practical; and the obtained material can improve the charge transfer capacity, effectively separate charge and reduce annihilation of excitons, is easy to form an amorphous film and has good processability.

Description

technical field [0001] The invention relates to the field of organic electroluminescent material technology and preparation methods, in particular to a red phosphorescent polymer iridium complex electroluminescent material and a related preparation method. Background technique [0002] Organic light-emitting diodes (OLEDs) have attracted extensive attention for their potential applications in low-cost, full-color displays. The OLED devices that are gradually used so far mainly use the fluorescence emission properties of organic photoelectric functional materials to emit light. Generally, only 25% of the singlet excitons can radiate attenuation and emit light, while 75% of the triplet excitons will have no radiation attenuation, resulting in device The luminous efficiency is low, and the theoretical upper limit of internal quantum efficiency is only 25%. The lower luminous efficiency not only makes the OLED device consume more energy, but also the energy of the triplet excit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06C08F230/04C08F226/12
Inventor 徐清王丽干宁刘羡春侯琳熙
Owner NINGBO UNIV
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