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Organic electroluminescent compound, preparation method thereof and organic electroluminescent device

A compound and electroluminescence technology, applied in the fields of organic chemistry, organic chemistry, electric solid devices, etc., can solve the problems of low glass transition temperature, poor thermal stability, high driving voltage, etc. Efficiency and life are not ideal, the effect of long life

Pending Publication Date: 2020-07-31
JILIN OPTICAL & ELECTRONICS MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these materials provide good light emitting characteristics, they have the following disadvantages: (1) Reduced lifetime of the device due to their low glass transition temperature and poor thermal stability
(2) Organic EL devices containing phosphorescent host materials require higher driving voltages
However, organic EL devices using these materials have problems in terms of quantum efficiency and lifetime, which need to be further improved

Method used

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  • Organic electroluminescent compound, preparation method thereof and organic electroluminescent device
  • Organic electroluminescent compound, preparation method thereof and organic electroluminescent device
  • Organic electroluminescent compound, preparation method thereof and organic electroluminescent device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Embodiment 1: preparation compound 1

[0046]

[0047]After compound 1-2 [bromobenzene (60mmol)] and 200mL tetrahydrofuran were added to the reaction vessel, the vessel was cooled to -78°C under a nitrogen atmosphere; then n-butyllithium (2.5M, 60mmol) was slowly added dropwise Added to the mixture and stirred for 2h; thereafter, compound 1-1[dibenzocycloheptanone (60mmol)] dissolved in 200mL tetrahydrofuran was slowly added dropwise to the mixture; after the addition, the reaction temperature was slowly warmed to room temperature, And the mixture was stirred for 12 hours; then ammonium chloride aqueous solution was added to the reaction solution to complete the reaction, and the reaction solution was extracted with ethyl acetate; the extracted organic layer was then dried using magnesium sulfate, and the solvent was removed using a rotary evaporator; The remaining material was purified by column chromatography to obtain compound 1-3 (12.7 g, yield 74%, MW: 286.43). ...

Embodiment 2

[0049] Embodiment 2: preparation compound 5

[0050]

[0051] Compound 5 was prepared according to the method of Example 1 (82% yield, MW: 589.12); the difference from Example 1 was that Intermediate 5-2 was used instead of Intermediate 1-2.

Embodiment 3

[0052] Embodiment 3: preparation compound 7

[0053]

[0054] Compound 7 was prepared according to the method of Example 1 (yield was 80%, MW: 613.22); the difference from Example 1 was that Intermediate 7-2 was used instead of Intermediate 1-2, and Intermediate 7-4 was used instead Intermediates 1-4.

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Abstract

The invention relates to the technical field of luminescent materials, in particular to an organic electroluminescent compound. The structural formula of the organic electroluminescent compound is shown as a chemical formula 1. The invention also discloses a preparation method of the organic electroluminescent compound and an organic electroluminescent device. The organic electroluminescent devicetaking the organic electroluminescent compound as a hole material has the advantages of high efficiency and long service life, the starting voltage is effectively reduced, and the problems of non-ideal quantum efficiency and shot service life of an existing organic EL device are solved.

Description

technical field [0001] The invention relates to the technical field of luminescent materials, in particular to an organic electroluminescence compound, a preparation method thereof and an organic electroluminescence device. Background technique [0002] Electroluminescent devices (EL devices) are self-luminescent devices that are advantageous in that they provide a wider viewing angle, greater contrast ratio, and faster response time. [0003] The organic EL element is a self-luminous element utilizing the principle that a fluorescent substance emits light by utilizing the recombination energy of holes injected from the anode and electrons injected from the cathode by applying an electric field. It has the following structure: an anode, a cathode, and an organic layer in between. In order to improve the efficiency and stability of organic EL elements, the organic material layer includes multiple layers with different materials such as hole injection layer (HIL), hole transp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06C07C211/54C07C211/58C07C211/61C07D307/91C07D209/86C07D209/88C07D333/76C07D213/38C07D219/02C07D311/82C07D491/048C07D405/12C07C209/68H01L51/50H01L51/54
CPCC09K11/06C07C211/54C07C211/58C07C211/61C07D307/91C07D209/86C07D209/88C07D333/76C07D213/38C07D219/02C07D311/82C07D491/048C07D405/12C07C2603/32C07C2603/18C07C2603/54C07C2603/24C07B2200/05C09K2211/1007C09K2211/1011C09K2211/1014C09K2211/1029C09K2211/1033C09K2211/1088C09K2211/1092H10K85/626H10K85/633H10K85/631H10K85/615H10K85/654H10K85/6576H10K85/6574H10K85/6572H10K85/657H10K50/15
Inventor 王士凯汪康贾宇赵贺邱镇李贺马晓宇
Owner JILIN OPTICAL & ELECTRONICS MATERIALS
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