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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
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  • Abstract
  • Description
  • Claims
  • Application Information

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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

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  • 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

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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...

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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

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Application Information

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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
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