Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Blue phosphorescent iridium metal complex and preparation method thereof and organic electroluminescent device

A technology of iridium metal complexes and blue phosphorescence, applied in the field of blue phosphorescent iridium metal complexes, its preparation, and organic electroluminescent devices, can solve the problems of lagging development and poor luminous performance of light-emitting devices

Inactive Publication Date: 2015-02-04
OCEANS KING LIGHTING SCI&TECH CO LTD +2
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with red light and green light materials, the development of blue light materials is relatively lagging behind. Improving the efficiency and color purity of blue light materials has become the breakthrough point of people's research. There are bottleneck problems in terms of efficiency and device efficiency attenuation, which makes the luminous performance of organic electroluminescent devices poor

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Blue phosphorescent iridium metal complex and preparation method thereof and organic electroluminescent device
  • Blue phosphorescent iridium metal complex and preparation method thereof and organic electroluminescent device
  • Blue phosphorescent iridium metal complex and preparation method thereof and organic electroluminescent device

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0072] The preparation method of the blue phosphorescent iridium metal complex has mild reaction conditions, low equipment requirements, low preparation cost and easy large-scale preparation.

[0073] see figure 2 , an organic electroluminescent device 300 according to one embodiment, including a substrate 301, an anode 302, a hole injection layer 303, a hole transport layer 304, an electron blocking layer 305, a light emitting layer 306, a hole blocking layer 307, and an electron layer stacked in sequence. Transport layer 308 , electron injection buffer layer 309 and cathode 310 .

[0074] The materials of the substrate 301, the anode 302, the hole injection layer 303, the hole transport layer 304, the electron blocking layer 305, the hole blocking layer 307, the electron transport layer 308, the electron injection buffer layer 309 and the cathode 310 are commonly used in the art. Material. For example, the substrate 101 is a glass substrate, the material of the anode 302 ...

Embodiment 1

[0079]Blue phosphorescent tris(2-(4',6'-difluoro-5'-cyanophenyl)pyrimidine-N,C 2 ') Synthesis of iridium complexes.

[0080] Blue phosphorescent tris(2-(4',6'-difluoro-5'-cyanophenyl)pyrimidine-N,C 2 ') The structural formula of the iridium complex is as follows:

[0081]

[0082] (1) Synthesis of 2-(2',4'-difluoro-3'-cyanophenyl)pyrimidine

[0083] In a nitrogen atmosphere, 1.59g (10mmol) of 2-bromopyrimidine, 2.20g (12mmol) of 2,4-difluoro-3-cyanophenylboronic acid and 0.58g (0.5mmol) of tetrakis (triphenylphosphine) palladium Dissolve in 40mL of toluene, and then add dropwise 20mL of an aqueous solution containing 2.76g (20mmol) of potassium carbonate to the reaction system. Heated and stirred at 100°C for 6h. After the reaction was completed, after the reaction solution was cooled to room temperature, extracted with dichloromethane, the organic phase was taken, washed with water until neutral, dried over anhydrous magnesium sulfate, filtered, and the filtrate was ev...

Embodiment 2

[0109] Blue phosphorescent tris(2-(4',6'-difluoro-5'-cyanophenyl)-5-methylpyrimidine-N,C 2 ') Synthesis of iridium complexes.

[0110] Blue phosphorescent tris(2-(4',6'-difluoro-5'-cyanophenyl)-5-methylpyrimidine-N,C 2 ') The structural formula of the iridium complex is as follows:

[0111]

[0112] (1) Synthesis of 2-(2',4'-difluoro-3'-cyanophenyl)-5-methylpyrimidine

[0113] In an argon atmosphere, 1.73g (10mmol) of 2-bromo-5-methylpyrimidine, 1.83g (10mmol) of 2,4-difluoro-3-cyanophenylboronic acid and 0.28g (0.4mmol) of dichlorobis (Triphenylphosphine)palladium was dissolved in 50mL of DMF, and then 25mL of an aqueous solution containing 3.18g (30mmol) of sodium carbonate was added dropwise to the reaction system. Stir the reaction under heating to 90°C for 8 hours. After the reaction was completed, after the reaction liquid was cooled to room temperature, extracted with dichloromethane, the organic phase was taken, washed with water until neutral, dried over anhydr...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Maximum lumen efficiencyaaaaaaaaaa
Maximum lumen efficiencyaaaaaaaaaa
Login to View More

Abstract

The invention relates to a blue phosphorescent iridium metal complex and a preparation method thereof and an organic electroluminescent device. The blue phosphorescent iridium metal complex has a structural formula as shown in the specification, wherein R is hydrogen, alkyl with the carbon atom number of 1-20 or alkoxy with the carbon atom number of 1-20. The blue phosphorescent iridium metal complex is a same matched-type metal iridium complexes using 2-(2 ', 4'-difluoro-3'-cyano phenyl) pyrimidine as a ring metal ligand body structure, pyrimidinyl on the ring metal ligand is conducive to enhancement of the LUMO (lowest unoccupied molecular orbital) level, electron withdrawing groups comprising difluoro groups and cyanogroup on the benzene ring are conducive to the reduction of the HOMO (highest occupied molecular orbital) level, the material luminescence wavelength can be effectively shifted to blue, and the luminescent properties can also be improved by introduction of the electron withdrawing groups comprising the fluoro groups and the cyanogroup. The complex used in the organic electroluminescent device can improve the light emitting performance of the organic electroluminescent device.

Description

technical field [0001] The invention relates to the technical field of electroluminescent materials, in particular to a blue phosphorescent 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 new prelude to t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C07F15/00C09K11/06H01L51/54
CPCC09K11/06C07D239/26C07D239/34C09K2211/185H10K85/342
Inventor 周明杰王平张娟娟张振华
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com