CN-121974809-A - Organic compound, preparation method thereof and organic electroluminescent device

Abstract

The invention provides an organic compound, a preparation method thereof and an organic electroluminescent device, which belong to the technical field of luminescent materials, wherein the organic compound has a structure shown in a general formula I, the organic compound provided by the invention is used as a light-emitting auxiliary material, can effectively improve the light-emitting efficiency and stability of an organic electroluminescent device, prolongs the service life, reduces the driving voltage and endows the device with more excellent comprehensive performance.

Inventors

• WANG KANG
• TANG ZHIJIE
• CHEN SHIYU
• PAN YUETAO
• XU XIANFENG
• GAO LONG
• DENG JIAYUAN

Assignees

• 吉林奥来德光电材料股份有限公司

Dates

Publication Date

20260505

Application Date

20260407

Claims (5)

1. 1. An organic compound, characterized in that the organic compound has a structure as shown in formula I: ; In formula I: A. B is not present at the same time, B is not present when A is present, A is not present when B is present; and A, B is independently selected from the structures represented by formula II: ; In formula II: ar 1 is selected from substituted or unsubstituted C6-C30 aryl, substituted or unsubstituted C6-C30 fused aryl, substituted or unsubstituted C6-C30 heteroaryl, wherein the heteroatom is selected from oxygen, nitrogen, or sulfur; when Ar 1 is selected from fluorenyl, it may not be spirofluorenyl; The hydrogen in formulas I and II is wholly deuterium substituted, partially deuterium substituted or non-deuterium substituted; substituted means substituted with one, two or more substituents selected from deuterium, C1-C20 alkyl, C1-C20 alkoxy, C6-C30 aryl, C6-C30 heteroaryl, wherein the heteroatom is selected from oxygen, nitrogen or sulfur.
2. 2. The organic compound according to claim 1, wherein Ar 1 is selected from the following substituted or unsubstituted structures: ; Wherein asterisks indicate the attachment site of the group.
3. 3. The organic compound according to claim 1, wherein the organic compound is selected from any one of the following compounds: 。
4. 4. An organic electroluminescent device, characterized in that the organic electroluminescent device comprises an anode, a cathode, and an organic layer disposed between the anode and the cathode, the organic layer comprising a light-emitting auxiliary layer comprising the organic compound according to any one of claims 1 to 3.
5. 5. The organic electroluminescent device according to claim 4, wherein the organic layer further comprises at least one of a hole injection layer, a hole transport layer, a light emitting layer, a hole blocking layer, an electron transport layer, or an electron injection layer.

Description

Organic compound, preparation method thereof and organic electroluminescent device Technical Field The invention belongs to the technical field of luminescent materials, and relates to an organic compound, a preparation method thereof and an organic electroluminescent device. Background An organic electroluminescent display (OLED) is an active light emitting display device. The OLED display screen has the characteristics of self-luminescence, bright and beautiful color, thin thickness, light weight, high response speed, wide viewing angle, low driving voltage, tolerance to harsh natural conditions, capability of being made into a flexible panel and the like, is widely applied to high-end smart phones manufactured by companies such as Hua Cheng, setaria, sanxing and the like at present, and the optimal luminous efficiency of the OLED display screen is a general requirement in the OLED field under the condition of low working voltage. Many improvements have been made to make organic EL devices practical. For example, it is known that high efficiency and high durability can be achieved by further distributing various functions of a laminated structure and forming an anode, and a hole injection layer, a hole transport layer, a hole blocking layer, a light emitting layer, an electron transport layer, an electron injection layer, and a cathode are provided on a substrate. With this organic EL device, charges injected from both electrodes are recombined in the light emitting layer to obtain light emission. In this case, how to efficiently transfer charges of holes and electrons to the light emitting layer is important, and the device needs to have excellent carrier balance. Also, by enhancing hole injection characteristics and electron blocking characteristics of blocking electrons injected from the cathode to increase the recombination probability of holes and electrons, and by confining excitons generated in the light emitting layer, light emitting efficiency is improved. Thus, the effect of the light-emitting auxiliary material is so important. The research of organic electroluminescent materials has been widely conducted in the academia and industry, but stable and efficient organic layer materials for organic electric elements have not been fully developed so far, and the industrialization process of the technology still faces a number of key problems, so how to develop a new luminescent auxiliary material is a problem to be solved by those skilled in the art. Disclosure of Invention Aiming at the defects of the prior art, the invention aims to provide an organic compound, a preparation method thereof and an organic electroluminescent device. In order to achieve the aim of the invention, the invention adopts the following technical scheme: in one aspect, the present invention provides an organic compound having a structure according to formula I: In formula I: A. B is not present at the same time, B is not present when A is present, A is not present when B is present; and A, B is independently selected from the structures represented by formula II: In formula II: ar 1 is selected from substituted or unsubstituted C6-C30 aryl, substituted or unsubstituted C6-C30 fused aryl, substituted or unsubstituted C6-C30 heteroaryl, wherein the heteroatom is selected from oxygen, nitrogen, or sulfur; When Ar 1 is selected from fluorenyl, it may not be spirofluorenyl. The hydrogens in formulas I and II are all deuterium substituted, partially deuterium substituted or non-deuterium substituted. Further, ar 1 is selected from the following substituted or unsubstituted structures: ; Wherein asterisks indicate the attachment site of the group. In this specification, "substituted" means substituted with one, two or more substituents selected from deuterium, C1-C20 alkyl, C1-C20 alkoxy, C6-C30 aryl, C6-C30 heteroaryl, wherein the heteroatom is selected from oxygen, nitrogen or sulfur. Further, the organic compound is selected from any one of the following compounds: 。 another object of the present invention is to provide a method for preparing the above luminescent auxiliary material, wherein the synthetic route of formula I is: wherein A, B is as defined above, hal 1、Hal2 is selected from fluorine, chlorine, bromine, iodine; Under the protection of N 2, the raw material A (1.0 eq), the raw material B (1.1-1.2 eq), the tetra (triphenylphosphine) palladium (0.01-0.02 eq) and the potassium carbonate (2.0-2.2 eq) are respectively added into a mixed solvent of toluene, ethanol and water, the temperature is raised to 90-100 ℃ for reaction for 8-10h, the reaction is cooled to room temperature after the reaction is finished, after the solid is separated out, the leaching is carried out, the water is used for washing to remove salt, a small amount of ethanol is used for leaching, and a dry filter cake is placed in a methanol solution for recrystallization, thus obtaining the intermediate 1. After intermediate 1 (1.0 eq) and raw material