CN-117143030-B - Naphthyl substituted electricity-absorbing fragment compound, electron transport material and application

Abstract

The application provides a compound of formula (I), which has high bond energy among atoms, good thermal stability, favorable solid state accumulation among molecules, proper energy level between adjacent layers and favorable injection and migration of excitons. When the organic electroluminescent material is used as an electron transport material, the driving voltage of the organic electroluminescent device can be effectively reduced, the luminous efficiency of the organic electroluminescent device can be improved, and the service life of the organic electroluminescent device can be prolonged. The application also provides an organic electroluminescent device and a display device comprising the compound of formula (I).

Inventors

• XING QIFENG
• FENG PEICHUAN
• SHAN HONGBIN
• MA YAN
• HU LINGFENG
• CHEN YUE
• CHEN YILI

Assignees

• 烟台显华科技集团股份有限公司

Dates

Publication Date

20260512

Application Date

20220520

Claims (4)

1. 1. A compound selected from the group consisting of compounds represented by A5, A6, A7, a20, a31, a 32: 。
2. 2. an electron transport material comprising at least one of the compounds of claim 1.
3. 3. An organic electroluminescent device comprising at least one of the electron transport materials of claim 2.
4. 4. A display device comprising the organic electroluminescent device of claim 3.

Description

Naphthyl substituted electricity-absorbing fragment compound, electron transport material and application Technical Field The application relates to the technical field of organic light-emitting display, in particular to a naphthyl substituted electricity-absorbing fragment compound, an electron transmission material and application. Background Electroluminescence (EL) refers to a phenomenon in which a light emitting material emits light when excited by current and voltage under the action of an electric field, and is a light emitting process in which electric energy is directly converted into light energy. The organic electroluminescent display (OLED) has the advantages of self-luminescence, low voltage DC drive, full solidification, wide viewing angle, light weight, simple composition and process, etc., compared with the liquid crystal display, the organic electroluminescent display does not need a backlight source, has large viewing angle and low power, the response speed can reach 1000 times of the liquid crystal display, and the manufacturing cost is lower than that of the liquid crystal display with the same resolution. Therefore, the organic electroluminescent device has very wide application prospect. With the continuous advancement of OLED technology in the two fields of illumination and display, people pay more attention to the research on efficient organic materials affecting the performance of OLED devices, and an organic electroluminescent device with good efficiency and long service life is usually the result of the optimized collocation of device structures and various organic materials, which provides great opportunities and challenges for chemists to design and develop functional materials with various structures. Compared with inorganic luminescent materials, the organic electroluminescent materials have many advantages, such as good processing performance, film formation on any substrate by vapor deposition or spin coating, flexible display and large-area display can be realized, and the optical performance, electrical performance, stability and the like of the materials can be adjusted by changing the structure of molecules, so that the selection of the materials has a large space. In the most common OLED device structures, organic materials of the classes hole injection materials, hole transport materials, electron transport materials, and light emitting materials (including host materials and guest materials) are typically included. Currently, an electron transport material is an important functional material, which has a direct effect on the mobility of electrons and ultimately affects the luminous efficiency of an OLED. The problem of low mobility of the current commercial electron transport materials is an important limiting factor in the development of device performance, and the method is worthy of more exploration for developing materials with higher mobility. Disclosure of Invention The application aims to provide a compound which can improve the working efficiency and prolong the service life of an organic electroluminescent device when being used as an electron transport material. In a first aspect the present application provides a compound of formula (I): Wherein, the Ar 1 and Ar 2 are each independently selected from C 6-C30 aryl which is unsubstituted or substituted by Rc, C 3-C30 heteroaryl which is unsubstituted or substituted by Rc, the number of C atoms of at least one of Ar 1 and Ar 2 is not less than 10, and at least one is selected from C 6-C30 aryl which is unsubstituted or substituted by Rc; X 1-X3 are each independently selected from C or N, and at least one is selected from N; Each R 1-R5 is independently selected from hydrogen, deuterium, C 6-C30 aryl unsubstituted or substituted with Rc, C 3-C30 heteroaryl unsubstituted or substituted with Rc, and at least one of R 1-R5 is selected from the following substituents: Y 1-Y8 are each independently selected from CR or N, R is selected from hydrogen, deuterium, C 6-C30 aryl unsubstituted or substituted with Rc, C 3-C30 heteroaryl unsubstituted or substituted with Rc; the heteroatoms on the heteroaryl groups are each independently selected from O, S or N; The substituents Rc of each group are each independently selected from deuterium, halogen, nitro, cyano, C 1-C4 alkyl, phenyl, biphenyl, terphenyl or naphthyl. The second aspect of the present application provides an electron transport material comprising at least one of the compounds provided in the first aspect of the present application. The third aspect of the present application provides an organic electroluminescent device comprising at least one of the electron transport materials provided in the second aspect of the present application. A fourth aspect of the application provides a display device comprising the organic electroluminescent device provided in the third aspect of the application. The compound provided by the application has a parent structure of