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CN-122010880-A - Organic compound and organic electroluminescent device comprising same

CN122010880ACN 122010880 ACN122010880 ACN 122010880ACN-122010880-A

Abstract

The organic compound has a structure shown in a formula I, can regulate HOMO and LUMO energy levels of a molecular skeleton through the synergistic effect between the design of a molecular structure and a group structure, has excellent bipolar charge transmission characteristics, realizes balanced transmission of holes and electrons, and has high singlet energy level and triplet energy level. The organic compound is used as a main material of the organic electroluminescent device, can improve the luminous efficiency of the device, ensures that the device efficiency rolls off slowly, has better stability, and greatly enriches the existing organic electroluminescent functional material system.

Inventors

  • WANG DONGDONG
  • LUO MEITING
  • Pei Jiangxue
  • CHEN YI

Assignees

  • 西安交通大学

Dates

Publication Date
20260512
Application Date
20241112

Claims (10)

  1. 1. An organic compound, characterized in that the organic compound has a structure as shown in formula I: Wherein the ring Ar is selected from any one of C6-C30 aromatic ring or C3-C30 heteroaromatic ring; Z 1 is selected from any one of unsubstituted or R 3 substituted C6-C30 aryl, unsubstituted or R 3 substituted C3-C30 heteroaryl, unsubstituted or R 3 substituted C6-C30 arylamino, unsubstituted or R 3 substituted C1-C20 straight or branched alkyl, unsubstituted or R 3 substituted C1-C20 alkoxy, unsubstituted or R 3 substituted C1-C20 alkylthio; R 1 、R 2 、R 3 is independently selected from any one of deuterium, halogen, cyano, unsubstituted or R 'substituted C1-C20 straight or branched alkyl, unsubstituted or R' substituted C6-C20 aryl, unsubstituted or R 'substituted C1-C20 alkoxy, unsubstituted or R' substituted C1-C20 alkylthio; R' is independently selected from any one of deuterium, halogen, cyano, unsubstituted or halogenated C1-C20 straight or branched alkyl, unsubstituted or halogenated C1-C20 alkoxy, unsubstituted or halogenated C1-C20 alkylthio; n is an integer from 1 to 3; m is selected from integers from 0 to 3; a is selected from integers of 0-2, b is selected from integers of 0-4, and a+b is less than or equal to 5.
  2. 2. The organic compound according to claim 1, wherein the organic compound has a structure as shown in formula II-a or formula II-B: Wherein R 11 is selected from any one of hydrogen, deuterium, halogen, cyano, unsubstituted or R 'substituted C1-C20 straight or branched alkyl, unsubstituted or R' substituted C6-C20 aryl, unsubstituted or R 'substituted C1-C20 alkoxy, unsubstituted or R' substituted C1-C20 alkylthio; ring Ar, Z 1 、R 1 、R 2 , R', n, m, a and b have the same defined ranges as in formula I; b 1 is selected from integers from 0 to 3; Preferably, the organic compound has a structure as shown in formula III-A or formula III-B:
  3. 3. An organic compound according to claim 1 or 2, wherein the ring Ar is selected from any one of the following groups:
  4. 4. The organic compound according to claim 1 or 2, wherein Z 1 is selected from any one of unsubstituted or R 3 substituted C1-C12 linear or branched alkyl, unsubstituted or R 3 substituted: Wherein — represents the attachment site of group Z 1 to ring Ar; Each X 1 、X 2 、X 3 is independently selected from any one of O, S, NR 21 or CR 22 R 23 ; R 21 、R 22 、R 23 is independently selected from any one of hydrogen, deuterium, C1-C20 straight or branched alkyl and C6-C20 aryl, preferably any one of hydrogen, C1-C6 straight or branched alkyl and phenyl; Preferably, the R 3 is selected from any one of deuterium, halogen, cyano, C1-C12 straight or branched alkyl which is unsubstituted or substituted by R ', C1-C10 alkoxy which is unsubstituted or substituted by R', C1-C10 alkylthio which is unsubstituted or substituted by R ', C6-C12 aryl which is unsubstituted or substituted by R', and more preferably any one of deuterium, fluorine, chlorine, cyano, C1-C10 straight or branched alkyl, fluoro C1-C10 straight or branched alkyl, deuterated C1-C10 straight or branched alkyl, C1-C10 alkoxy, C1-C10 alkylthio and phenyl.
  5. 5. The organic compound according to claim 1 or 2, wherein Z 1 is selected from any one of C1-C6 linear or branched alkyl, fluoro-C1-C6 linear or branched alkyl, deuterated C1-C6 linear or branched alkyl, the following groups: Wherein — represents the attachment site of group Z 1 to ring Ar; R 31 、R 32 is independently selected from any one of deuterium, fluorine, chlorine, cyano, C1-C10 straight or branched alkyl, fluoro C1-C10 straight or branched alkyl, deuterated C1-C10 straight or branched alkyl, C1-C10 alkoxy, C1-C10 alkylthio and phenyl.
  6. 6. The organic compound according to claim 1 or 2, wherein each R 1 、R 2 is independently selected from any one of deuterium, halogen, cyano, unsubstituted or R 'substituted C1-C12 straight or branched alkyl, unsubstituted or R' substituted C1-C10 alkoxy, unsubstituted or R 'substituted C1-C10 alkylthio, unsubstituted or R' substituted C6-C12 aryl; Preferably, each R' in R 1 、R 2 is independently selected from any one of deuterium, fluorine, chlorine, cyano, C1-C10 straight or branched alkyl, fluoro C1-C10 straight or branched alkyl, deuterated C1-C10 straight or branched alkyl, C1-C10 alkoxy, C1-C10 alkylthio; Preferably, each R 1 、R 2 is independently selected from any one of deuterium, halogen, cyano, C1-C10 straight or branched alkyl, fluoro C1-C10 straight or branched alkyl, deuterated C1-C10 straight or branched alkyl, C1-C10 alkoxy, C1-C10 alkylthio, phenyl substituted by C1-C6 straight or branched alkyl, further preferably any one of deuterium, fluoro, chloro, cyano, C1-C8 straight or branched alkyl, fluoro C1-C8 straight or branched alkyl, deuterated C1-C8 straight or branched alkyl, C1-C6 alkoxy, C1-C8 alkylthio, phenyl, tert-butyl substituted phenyl.
  7. 7. The organic compound according to claim 1 or 2, characterized in that the organic compound is selected from any one of the following compounds:
  8. 8. An organic electroluminescent device, characterized in that the organic electroluminescent device comprises a cathode, an anode, and an organic layer disposed between the cathode and the anode, wherein the organic layer comprises the organic compound according to any one of claims 1 to 7.
  9. 9. The organic electroluminescent device according to claim 8, wherein the organic layer comprises a light-emitting layer comprising the organic compound according to any one of claims 1 to 7; Preferably, the light-emitting layer comprises a host material and a light-emitting dye, the host material comprising the organic compound according to any one of claims 1 to 7.
  10. 10. Use of an organic electroluminescent device as claimed in claim 8 or 9 in a display device or a lighting device.

Description

Organic compound and organic electroluminescent device comprising same Technical Field The invention belongs to the technical field of organic electroluminescent materials, and particularly relates to an organic compound and an organic electroluminescent device containing the same. Background An Organic Light-Emitting Diode (OLED) is a display device utilizing a self-luminescence phenomenon, and compared with a liquid crystal display, the OLED device has the characteristics of active luminescence, fast response speed and ultra-thin, and can realize ultra-thin and flexible display, and is attractive and expected in multiple industries as a new full-color display technology and an illumination technology. An OLED device is generally composed of an anode, a cathode, and an organic layer sandwiched therebetween, wherein the organic layer is in turn composed of a multi-layered structure of substances of different functions, such as a hole injection layer, a hole transport layer, an electron blocking layer, a light emitting layer, a hole blocking layer, an electron transport layer, and the like. Among them, the light emitting layer is generally composed of a light emitting material and a host material, and the light emitting material mainly determines the light emitting color, light emitting efficiency and operation stability of the OLED device. Meanwhile, the electron-hole transmission balance, the singlet energy level, the triplet energy level, the HOMO energy level, the LUMO energy level and the matching of the resistance barrier layer and the hole blocking layer of the main body material matched with the luminescent material are also important factors influencing the working stability and the luminous efficiency of the OLED device, and the main body material is particularly important for a blue light OLED device. At present, the stability and luminous efficiency of the blue light OLED device have great room for improvement, which restricts the industrialized development of the whole OLED display panel. For this reason, in addition to the requirement for a high-efficiency light-emitting material, the performance of the host material is also extremely important. The existing blue light main material mainly has the problems of unbalance of electron-hole transmission, mismatching of HOMO energy level and LUMO energy level with the energy level of an interface electron/hole blocking layer and too low triplet state energy level, so that the luminous performance of a blue light OLED device is insufficient. Therefore, designing and searching a new host material to be used as a new host material of blue dye of OLED components and devices to overcome the defects in industrial application is always the focus of OLED material research work. Disclosure of Invention Aiming at the defects of the prior art, the invention aims to provide an organic compound and an organic electroluminescent device comprising the same, and the organic compound can realize the transmission balance of electrons and holes through the design of a molecular structure, has high singlet energy level and triplet energy level, is used for the organic electroluminescent device, is particularly suitable for being used as a main material of a luminescent layer, can realize the improvement of the efficiency of the device, delays the attenuation of the efficiency of the device caused by the increase of brightness, and improves the working stability of the device. To achieve the purpose, the invention adopts the following technical scheme: In a first aspect, the present invention provides an organic compound having a structure according to formula I: In the formula I, the ring Ar is selected from any one of C6-C30 aromatic ring or C3-C30 heteroaromatic ring. In the formula I, Z 1 is selected from any one of unsubstituted or R 3 substituted C6-C30 aryl, unsubstituted or R 3 substituted C3-C30 heteroaryl, unsubstituted or R 3 substituted C6-C30 arylamino, unsubstituted or R 3 substituted C1-C20 straight-chain or branched alkyl, unsubstituted or R 3 substituted C1-C20 alkoxy and unsubstituted or R 3 substituted C1-C20 alkylthio. R 1、R2、R3 is each independently selected from any one of deuterium, halogen, cyano, unsubstituted or R 'substituted C1-C20 straight or branched alkyl, unsubstituted or R' substituted C6-C20 aryl, unsubstituted or R 'substituted C1-C20 alkoxy, unsubstituted or R' substituted C1-C20 alkylthio. R' is independently selected from any one of deuterium, halogen, cyano, unsubstituted or halogenated C1-C20 straight-chain or branched alkyl, unsubstituted or halogenated C1-C20 alkoxy and unsubstituted or halogenated C1-C20 alkylthio. In the present invention, the "unsubstituted or R 3 substituted" group may be substituted with one substituent R 3 or may be substituted with a plurality of substituents R 3, and when the number of substituents R 3 is plural (at least 2), the plurality of R 3 are the same or different groups. The "unsubstituted or R '