Thermally activated delayed fluorescent material and use thereof

A technology for thermally activated delayed and fluorescent materials, which is applied in the application of the material in the field of organic electroluminescence, the field of small molecule organic electroluminescence materials, and can solve the limitation of the application space of phosphorescent materials, high price, and high price of phosphorescent materials, etc. problems, to achieve the effect of reducing the crystallization tendency, good film stability, and excellent device efficiency

Inactive Publication Date: 2018-12-18
VALIANT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the efficiency of phosphorescent devices is higher than that of fluorescent devices, phosphorescent devices also have their shortcomings, such as phosphorescent materials mainly containing complexes of noble metals, especially the complexes of metal iridium and platinum, because metal iridium and platinum themselves are expensive, Therefore, the price of phosphorescent materials is extremely expensive, which also limits the application space of phosphorescent materials

Method used

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  • Thermally activated delayed fluorescent material and use thereof
  • Thermally activated delayed fluorescent material and use thereof
  • Thermally activated delayed fluorescent material and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The preparation of intermediate B01, chemical equation is as follows:

[0034]

[0035] The specific operation process is: in a 500mL three-necked flask, add compound A01 (34.6g, 0.12mol), ethylenediamine (9.0g, 0.15mol), glacial acetic acid (210g), under the protection of nitrogen, heat up to 105 ° C, heat preservation reaction After 8 hours, the temperature was lowered to 45°C, the reaction liquid was poured into 900g deionized water, stirred for 0.5h, suction filtered, rinsed with 150g methanol, the filter cake was collected, 1,2-dichloroethane (320g), 2,3 -Dichloro-5,6-dicyano-p-benzoquinone (27.4g, 0.12mol), heat up to 65°C, keep the temperature for 6h, cool down to 30°C, filter, collect the filtrate, wash with 50g deionized water, collect the organic phase , the solvent was removed under reduced pressure, and the resulting crude product was purified by silica gel column chromatography, the eluent was dichloromethane:petroleum ether=1:2 (volume ratio), and 16.4g...

Embodiment 2

[0037] The preparation of intermediate B02, chemical equation is as follows:

[0038]

[0039] Intermediate B02 was prepared with reference to the method described in Example 1, the difference being that the raw material ethylenediamine in Example 1 was replaced by 1,2-diphenylethylenediamine to obtain 15.1 g of the target object, high-resolution mass spectrum, positive Ion mode, formula C 22 h 4 Br 2 N 2 , the theoretical value is 463.9347, and the test value is 463.9341.

Embodiment 3

[0041] The preparation of intermediate B03, chemical equation is as follows:

[0042]

[0043] Intermediate B03 was prepared with reference to the method described in Example 1, except that the raw material A01 in Example 1 was replaced by A02 to obtain 17.2 g of the target object, high-resolution mass spectrometry, positive ion mode, molecular formula C 10 h 4 Cl 2 N 2 , theoretical value 221.9752, test value 221.9756. ,

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Abstract

The invention relates to a thermally activated delayed fluorescent material and a use thereof. The thermally activated delayed fluorescent material has a molecular structure shown in the formula (I).The structure has very small triplet excited state-single excited state energy level difference, an appropriate molecule energy level and good film stability, can realize thermal activation delayed fluorescence emission, can be used as a light-emitting layer of an organic electroluminescent device and can be used in the field of organic electroluminescence.

Description

technical field [0001] The invention belongs to the field of organic electroluminescence, and relates to a small molecule organic electroluminescence material capable of realizing thermally activated delayed fluorescent light emission, and relates to the application of the material in the field of organic electroluminescence. Background technique [0002] Organic light-emitting diode (OLED) was produced in the 1980s. It has many advantages such as self-illumination, wide viewing angle, fast response speed, wide color gamut, and flexible display. After 30 years of continuous development, this technology has Gradually becoming mature, at present, organic electroluminescent technology has been widely used in many products such as smart phones, flat-panel TVs, and virtual reality. [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 phos...

Claims

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Application Information

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IPC IPC(8): C07D401/14C07D413/04C07D413/14C09K11/06H01L51/54
CPCC09K11/06C07D401/14C07D413/04C07D413/14C09K2211/1044H10K85/615H10K85/657H10K85/6572
Inventor 盛磊王正张梅高树坤胡葆华王元元
Owner VALIANT CO LTD
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