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Organic Electroluminescent Materials and Devices

An organic layer and electrode technology, applied in the application of organic electroluminescent devices, in the field of compounds containing quinazolinotriazole, an electron-deficient group structure, can solve the problem of reducing the recombination probability of holes and electrons, reducing The luminous efficiency of the device, the increase of the operating voltage of the device, etc., achieve the effects of good electron injection and transmission performance, improved device efficiency, and low driving voltage

Active Publication Date: 2020-03-06
BEIJING ETERNAL MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Generally speaking, electron-transporting materials are compounds with electron-deficient nitrogen-containing heterocyclic groups. Most of them have high electron affinity, so they have a strong ability to accept electrons. , common electron transport materials such as AlQ 3 The electron mobility of (octahydroxyquinoline aluminum) is much lower than the hole mobility of the hole transport material, so in the OLED device, on the one hand, it will cause the gap between the holes and electrons caused by the unbalanced injection and transport of carriers. The recombination probability of the device is reduced, thereby reducing the luminous efficiency of the device. On the other hand, the electron transport material with lower electron mobility will lead to an increase in the operating voltage of the device, thereby affecting the power efficiency, which is not good for energy saving.

Method used

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  • Organic Electroluminescent Materials and Devices
  • Organic Electroluminescent Materials and Devices
  • Organic Electroluminescent Materials and Devices

Examples

Experimental program
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Effect test

preparation example Construction

[0058] Preparation of compound 1-1

[0059] After 2,4-dichloroquinazoline (500g, 2.5mol) was dissolved in 10L ethanol in a flask, hydrazine hydrate (470g, 7.5mol, 80% aqueous solution) was added dropwise at 5°C under stirring, and the dropwise addition process kept the temperature low at 10°C. After the dropwise addition, the mixture was naturally raised to room temperature for 1 hour, and the precipitated solid was filtered with suction, washed with water and ethanol, and dried in the air to obtain compound 1-1 (415 g, 86%) as an off-white solid.

[0060] Preparation of compound 1-2

[0061] Compound 1-1 (200 g, 1.03 mol) was added to a flask containing 2 L of ethanol, and p-chlorobenzaldehyde (158 g, 1.13 mol) was added dropwise with stirring at room temperature. Stirring was continued for 30 minutes after the addition was complete, and TLC showed that the reaction was complete. Under stirring at room temperature, 1 L of ethanol solution in which iodobenzene acetate (364 g...

Embodiment 1

[0136] Using the compound C7 of the present invention as the electron transport material, an organic electroluminescent device was prepared according to the above-mentioned preparation process of the organic electroluminescent device, and the device performance was tested according to the above-mentioned organic electroluminescent device testing method.

Embodiment 2

[0138] An organic electroluminescent device was prepared by the same method as in Example 1, except that the compound C7 was replaced by C15.

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Abstract

The present invention relates to a compound, which is characterized in that it has a structural formula as shown in formula (1): wherein, L is a single bond, a C6-C30 arylene group or a C3-C30 heteroarylene group; m is 1 Integer of ~4; R 1 and R 2 Each independently is H, C6-C30 aryl or C3-C30 heteroaryl; Ar is the following structure:, X 1 ~X 6 for C, CR 3 or N, and at least one X is N, R 3 It is H or a C3-C30 aryl or heteroaryl group containing 0-3 heteroatoms, if there are multiple R 3 , multiple R 3 same or different from each other. The invention also relates to organic electroluminescent devices containing the compounds.

Description

technical field [0001] The invention relates to a new organic heterocyclic compound, in particular to a class of compounds containing quinazolinotriazole, an electron-deficient group structure, and its application in organic electroluminescent devices. Background technique [0002] At present, with the continuous advancement of OLED technology in the two major fields of display and lighting, people pay more attention to the research of its core materials. As core materials, common functional organic materials include: hole injection materials, hole transport materials, hole blocking materials, electron injection materials, electron transport materials, electron blocking materials, and luminescent host materials and luminescent objects (dye). [0003] Generally speaking, electron-transporting materials are compounds with electron-deficient nitrogen-containing heterocyclic groups. Most of them have high electron affinity, so they have a strong ability to accept electrons. , c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D487/04H01L51/50H01L51/54
CPCC07D487/04H10K85/615H10K85/654H10K85/6572H10K50/00
Inventor 孙恩涛刘叔尧冯嘉宁吴俊宇
Owner BEIJING ETERNAL MATERIAL TECH