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Iridium complexes, preparation method thereof, and electroluminescent devices using the iridium complexes

A technology of iridium complexes and complexes, which is applied in the field of electroluminescent devices and organic electroluminescent devices, can solve the problems of efficiency roll-off and efficiency reduction, and achieve the effects of convenient design and production, stable chemical properties, and high luminous efficiency

Inactive Publication Date: 2017-03-15
AAC MICROTECH CHANGZHOU +1
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  • Abstract
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  • 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 devices using the iridium complexes
  • Iridium complexes, preparation method thereof, and electroluminescent devices using the iridium complexes
  • Iridium complexes, preparation method thereof, and electroluminescent devices using the iridium complexes

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Embodiment Construction

[0024] 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.

[0025] The invention discloses a red-light iridium complex, which includes four novel main ligands and an auxiliary ligand. Wherein, the auxiliary ligand is 2-(5-phenyl-1,3,4-oxadiazole-2-)phenol or 2-(5-(3-pyridyl)-1,3,4-oxa Oxadiazole-2-)phenol. The main ligand is 2-(4,6-bistrifluoromethylpyridine-3-)quinoline, 2-(4,6-bistrifluoromethylpyridine-4-)quinoline, 2-(4 , 6-bistrifluoromethylpyridine-3-)isoquinoline, 2-(4,6-bistrifluoromethylpyridine-4-)isoquinoline, 2-(4,6-bistrifluoromethyl Pyridine-3-)quinazoline, 2-(4,6-bistrifluoromethylpyridine-4-)quinazoline and 2-(4,6-bistrifluoromethylpyridine-3-)phthalazine, Any one of 2-(4,6-bistrifluoromethylpyridine-4-)phthalazine derivatives. The pyridi...

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Abstract

The invention relates to iridium complexes, wherein 2-(5-phenyl-1,3,4-oxadiazole-2-)phenol or 2-(5-(3-pyridine)-yl-1,3,4-oxadiazole-2-)phenol is emplyoed as an auxiliary ligand; and a derivative of any one of 2-(4,6-ditrifluoromethylpyridine-3-)quinoline, 2-(4,6-ditrifluoromethylpyridine-4-)quinoline, 2-(4,6-ditrifluoromethylpyridine-3-)isoquinoline, 2-(4,6-ditrifluoromethylpyridine-4-)isoquinoline, 2-(4,6-ditrifluoromethylpyridine-3-)quinazoline, 2-(4,6-ditrifluoromethylpyridine-4-)quinazoline, 2-(4,6-ditrifluoromethylpyridine-3-)phthalazine and 2-(4,6-ditrifluoromethylpyridine-4-)phthalazine is employed as a main ligand. The luminous intensity and efficiency of the iridium complexes, within the wavelength range of red light, can be regulated.

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 an electroluminescent 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 mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F15/00C09K11/06H01L51/54
CPCC09K11/06C07F15/0033C09K2211/185H10K85/342
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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