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

Halogen atom-containing bidentate ligand, its iridium complex and electrogenerated phosphorescence device

A technology of electroluminescent devices and bidentate ligands, which is applied in the direction of electroluminescent light sources, electric light sources, electrical components, etc., can solve the problems of shortened phosphorescent life, achieve excellent electrophosphorescent performance, and improve brightness and efficiency.

Inactive Publication Date: 2008-01-16
WUHAN UNIV
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The atomic transitions of these heavy metal atoms themselves do not emit light, but their lowest energy excited states are usually triplet metal-to-ligand energy transfer ( 3 MLCT), the phosphorescent lifetime is greatly shortened (<100μs)

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
  • Halogen atom-containing bidentate ligand, its iridium complex and electrogenerated phosphorescence device
  • Halogen atom-containing bidentate ligand, its iridium complex and electrogenerated phosphorescence device
  • Halogen atom-containing bidentate ligand, its iridium complex and electrogenerated phosphorescence device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] The present invention is further illustrated by specific examples below, but these specific embodiments do not limit the protection scope of the present invention in any way.

[0027] The raw materials used in this embodiment are known compounds, which can be purchased on the market, or can be synthesized by methods known in the art.

[0028] 1. Synthesis of ligand:

[0029] In a 25ml round-bottom flask, put 2-amino-o-mercaptophene (1.25g, 10mmol) and 4-halobenzaldehyde / 3-bromobenzaldehyde (10mmol), add 20ml dimethylsulfoxide (DMSO), protect with argon Reflux for 4 h. After cooling to room temperature, the reaction solution was poured into a large amount of ice water, filtered with suction, the crude product was washed with a large amount of water, dried in a vacuum drying oven, and then recrystallized with absolute ethanol (18.6ml).

[0030] 4-chloro-2-phenylbenzothiazole (4-cbt), white crystals, yield 80.3%. 1 H NMR(CDCl 3 , 300MHz) δ [ppm]: 8.03 (t, J = 8.4 Hz, 3H), 7.89...

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
current efficiencyaaaaaaaaaa
wavelengthaaaaaaaaaa
current efficiencyaaaaaaaaaa
Login to View More

Abstract

The disclosed bidentate ligand contains halogen atom and bases on 2-phenyl benzothiazole. Wherein, the opposite iridium complex has chemical formula as Ir(C Lambda N)2(acac) with C Lambda N as the ligand here and acac as acetylacetone anion. The opposite electroluminescent device based on the iridium complex comprises: a conductive glass substrate layer, a hole conduction layer, a luminescent layer, an electronic layer, a barrier layer for hole and exciton, and a cathode layer. Compared with prior art, this invention improves the brightness and efficiency of device, can adjust wavelength, and has wide application.

Description

Technical field [0001] The present invention relates to the field of organic electroluminescent materials, in particular to a heavy metal element iridium complex luminescent material containing at least one halogen atom (chlorine, bromine or iodine) based on a 2-phenylbenzothiazole ligand. Background technique [0002] In 1987, C.W. Tang (Appl. Phys. Lett. 1987, 51, 913) of Kodak Company of the United States reported that in the double-layer organic film structure, the use of 8-hydroxyquinoline aluminum (Alq 3 ) Is a luminescent material, which can obtain low driving voltage (10V) and high brightness (1000cd / m 2 ), high-efficiency (1.51m / w) organic electroluminescent devices (OLEDs), making a breakthrough in the research of organic small molecule electroluminescent devices. In 1990, J.H. Burroughes et al. (Nature, 1990, 347, 539) used PPV to successfully fabricate light-emitting diodes, which marked a pioneering achievement in the development of organic polymer electroluminescent...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C07D277/62C09K11/06H05B33/14
Inventor 杨楚罗陈连清秦金贵
Owner WUHAN UNIV
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