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Organic electroluminescent material and organic electroluminescent device comprising same

An electroluminescent material and electroluminescent device technology, applied in the direction of luminescent materials, electric solid devices, electrical components, etc., can solve the problems of inability to form a good film, easy crystallization or aggregation between molecules, poor thermal stability, etc. Effects of improved external quantum efficiency, less crystallization, and good film-forming properties

Inactive Publication Date: 2018-12-21
VALIANT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, as far as the actual needs of the OLED display lighting industry are concerned, the development of OLED materials is far from enough. Existing OLED materials often have problems such as easy crystallization or aggregation between molecules, poor film formation, and poor thermal stability. Falling behind the requirements of organic electroluminescent device manufacturers, it is particularly important for material companies to develop higher-performance organic functional materials

Method used

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  • Organic electroluminescent material and organic electroluminescent device comprising same
  • Organic electroluminescent material and organic electroluminescent device comprising same
  • Organic electroluminescent material and organic electroluminescent device comprising same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The present embodiment provides a kind of organic electroluminescent material, shown in its following formula (I):

[0032]

[0033] Among them, Ar 1 and Ar 2 Both are aromatic substituents.

[0034] Wherein, the Ar in formula (I) 1 and Ar 2 The same or different, the Ar in the formula (I) 1 and the Ar 2 Independently selected from any one of the following groups:

[0035]

[0036] The compound represented by the formula (I) is any one of the following structural formulas C01-C61:

[0037]

[0038]

[0039]

[0040]

[0041]

[0042]

[0043]

[0044] The organic electroluminescent material provided in this embodiment has the characteristics of less crystallization and aggregation between molecules, and good film-forming properties, and the rigid groups in the molecules can improve the thermal stability of the material. When the organic electroluminescent material is used as the doping material of the light-emitting layer of the OLED de...

Embodiment 2

[0046] This example provides the preparation method of some compounds in C01-C61 in Example 1.

[0047] Preparation of Compound 1:

[0048]

[0049] Preparation of Intermediate 1: In a 1L three-neck flask, add raw materials benzobisthiadiazole (89.7g, 0.40mol), ethylene glycol (27.9g, 0.45mol), 3.0g p-toluenesulfonic acid and 450mL xylene, Heated to reflux, and the water separator refluxed for 10 hours of reaction. After the reaction, wash with water, separate liquids, desolventize the organic phase under reduced pressure, perform column chromatography, and recrystallize from toluene petroleum ether to obtain a brown solid intermediate 1 with a HPLC purity of 99.4% and a yield of 60.3%, MS (m / s): 224.22.

[0050] Preparation of Intermediate 2: In a 1L three-necked flask equipped with a constant pressure dropping funnel, metal magnesium (5.1g, 0.21mol) was added, p-bromoiodobenzene (56.6g, 0.20mol) was dissolved in 300g tetrahydrofuran, and Put it in a constant pressure d...

Embodiment 3

[0165] This embodiment provides an application of an organic electroluminescent material, such as the application of the organic electroluminescent material described in Embodiment 1 in at least one functional layer of an organic electroluminescent device.

[0166] Such as figure 1 As shown, this embodiment also provides an organic electroluminescent device, which includes an anode 101, a hole transport layer 102, a light emitting layer 103, an electron transport layer 104, an electron injection layer 105 and a cathode 106; wherein, in the The hole transport layer 102, the light emitting layer 103, the electron transport layer 104, the electron injection layer 105 and the cathode 106 are sequentially stacked on the anode 101; Luminescent material.

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Abstract

The invention relates to an organic electroluminescent material and an organic electroluminescent device comprising the same, and belongs to the field of organic photoelectric materials. The molecularstructure of the organic electroluminescent material is shown as the following general molecular formula (I): (the formula is shown in the specification), where both Ar1 and Ar2 are aromatic substituent groups, and Ar1 and Ar2 may be the same or different. The organic electroluminescent material provided by the invention is applied at least in one functional layer of the organic electroluminescent device. The organic electroluminescent material has the characteristics of low possibilities of intermolecular crystallization and gathering, and good film formation; moreover, a rigid group in themolecule can improve the thermal stability of the luminescent material. The organic electroluminescent material is applied to the organic electroluminescent device, and the current efficiency, power efficiency and external quantum efficiency of the organic electroluminescent device are greatly improved; meanwhile, the organic electroluminescent material makes the distribution of electrons and holes in the luminescent layer being more balanced, and the organic electroluminescent material is very suitable as a luminescent host material.

Description

technical field [0001] The invention relates to an organic electroluminescent material and an organic electroluminescent device containing the material, belonging to the field of organic photoelectric materials. Background technique [0002] Organic electroluminescent devices (OLEDs for short) were produced in the 1980s. Compared with liquid crystal displays, OLEDs have many advantages such as self-luminescence, wide viewing angle, fast response speed, and flexible display, so they have attracted widespread attention. [0003] Organic electroluminescent devices are current-driven light-emitting devices. According to different light-emitting mechanisms, they can be divided into two types: fluorescent devices and phosphorescent devices. When charges are injected into the device from the electrodes, due to the randomness of the electron spin direction, single The proportion of excitons in the singlet state is only 25%, and the other 75% are triplet excitons. In general, fluores...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D513/04C07D519/00C09K11/06H01L51/50H01L51/54
CPCC09K11/06C07D513/04C07D519/00C09K2211/1014C09K2211/1007C09K2211/1029C09K2211/1088C09K2211/1092C09K2211/1044C09K2211/1033C09K2211/1037H10K85/631H10K85/6572H10K85/657H10K50/171H10K50/15H10K50/16H10K50/11
Inventor 慈振华马永洁林存生石宇胡葆华周银波孟凡民
Owner VALIANT CO LTD
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