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Iridium complexes, preparation method thereof and electroluminescent device using iridium complexes

A technology of iridium complexes and complexes, applied in the field of light-emitting devices and organic electroluminescent devices, can solve the problems of reduced efficiency, efficiency roll-off and the like, and achieve the effects of convenient design and production, high yield and simple preparation method

Inactive Publication Date: 2017-02-22
AAC MICROTECH CHANGZHOU +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, in the current commonly used materials, the hole mobility of hole transport materials is much higher than that of electron transport materials, and the commonly used host materials are mainly hole transport, which will lead to a large number of redundant holes. Aggregation of holes at the interface between the light-emitting layer and the electron-transporting layer
These factors can lead to reduced efficiency and severe efficiency roll-off
Studies have shown that if the iridium complex has a high electron transport ability, it can effectively increase the transport and distribution of electrons in the light-emitting layer, broaden the electron-hole area, balance the number of electron-hole pairs, and greatly improve the device. efficiency, the reduced efficiency of the roll-off

Method used

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  • Iridium complexes, preparation method thereof and electroluminescent device using iridium complexes
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  • Iridium complexes, preparation method thereof and electroluminescent device using iridium complexes

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Embodiment Construction

[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. The terms used in the present invention, unless otherwise specified, generally have the meanings commonly understood by those skilled in the art.

[0023] A kind of iridium complex, it contains three ligands, and described ligand is 2-(4,6-bistrifluoromethylpyridine-3-) quinoline, 2-(4,6-bistrifluoromethyl Pyridine-4-)quinoline, 2-(4,6-bistrifluoromethylpyridine-3-)isoquinoline, 2-(4,6-bistrifluoromethylpyridine-4-)isoquinoline, 2-(4,6-bistrifluoromethylpyridine-3-)quinazoline, 2-(4,6-bistrifluoromethylpyridine-4-)quinazoline and 2-(4,6-bis Any one of trifluoromethylpyridine-3-)phthalazine and 2-(4,6-bistrifluoromethylpyridine-4-)phthalazine derivatives, the ligand neutralizes iridium with a carbon atom The pyridine derivatives at position are: The quinoline, isoquinoline, quinazoline and phthalazine derivatives coordinated by nitrogen atoms...

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Abstract

The invention relates to three-element co-ligand iridium complexes with novel ligands. The ligands in molecules of the iridium complexes in the series are 2-(4,6-bis(trifluoromethyl)pyridine-3-)quinoline, 2-(4,6-bis(trifluoromethyl)pyridine-4-)quinoline, 2-(4,6-bis(trifluoromethyl)pyridine-3-)isoquinoline, 2-(4,6-bis(trifluoromethyl)pyridine-4-)isoquinoline, 2-(4,6-bis(trifluoromethyl)pyridine-3-)quinazoline, 2-(4,6-bis(trifluoromethyl)pyridine-4-)quinazoline, 2-(4,6-bis(trifluoromethyl)pyridine-3-)phthalazine and 2-(4,6-bis(trifluoromethyl)pyridine-4-)phthalazine derivatives. The novel iridium complexes have the advantages that the luminous efficiency is high, the chemical property is stable, sublimation purification is easy and the like, and besides, the performance of a device is good. The luminous intensity and efficiency of the ligands can be adjusted in the wavelength coverage of red light through a molecular structure modifying the ligands, which brings convenience to design and production of organic electroluminescent displays and lighting sources.

Description

[0001] 【Technical field】 [0002] The invention relates to the technical field of organic electroluminescent devices, in particular to a class of iridium complexes, a preparation method thereof and a light-emitting device using the iridium complexes. [0003] 【Background technique】 [0004] Against the background of increasing global energy demand and worrying ecological environment, governments of various countries have vigorously developed sustainable energy-saving technologies and industries based on high technology. Organic electroluminescent devices (OLEDs) have attracted much attention because of their advantages such as wide viewing angle, high brightness, low energy consumption and flexible devices, and are known as the key technology that will dominate the future display world. In recent years, a large number of studies have shown that among many complexes of heavy metal elements, iridium complexes are considered to be the most ideal choice of phosphorescent materials ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F15/00C09K11/06H01L51/54H01L51/50
CPCC09K11/06C07F15/0033C09K2211/185H10K85/342H10K50/11
Inventor 郑佑轩韩华博王毅潘毅左景林周洁虞磊
Owner AAC MICROTECH CHANGZHOU
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