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CN-122010911-A - Organic material, organic electroluminescent device, and electronic apparatus

CN122010911ACN 122010911 ACN122010911 ACN 122010911ACN-122010911-A

Abstract

The application belongs to the technical field of organic electroluminescence, in particular to an organic material, an organic electroluminescent device and an electronic device, the organic material has the structure shown in the formula 1, and can be used in an organic electroluminescent device to remarkably improve the performance of the organic electroluminescent device.

Inventors

  • ZHENG YIYI
  • WEI CHENG

Assignees

  • 陕西莱特光电材料股份有限公司

Dates

Publication Date
20260512
Application Date
20241111

Claims (13)

  1. 1. An organic material, characterized in that the organic material has a structure as shown in formula 1: wherein D represents deuterium, m and n are the number of D, n is selected from 0,1, 2, 3, 4, 5, 6 or 7;m is selected from 0,1, 2, 3 or 4; L, L 1 and L 2 are the same or different and are each independently selected from a single bond, a substituted or unsubstituted arylene group having 6 to 30 carbon atoms, and a substituted or unsubstituted heteroarylene group having 3 to 30 carbon atoms; Ar 1 and Ar 2 are the same or different and are each independently selected from a substituted or unsubstituted aryl group having 6 to 40 carbon atoms and a substituted or unsubstituted heteroaryl group having 3 to 40 carbon atoms; L, L 1 、L 2 、Ar 1 and Ar 2 are the same or different and are each independently selected from deuterium, a halogen group, a cyano group, an alkyl group having 1 to 10 carbon atoms, a deuterated alkyl group having 1 to 10 carbon atoms, a cycloalkyl group having 3 to 10 carbon atoms, an aryl group having 6 to 20 carbon atoms, a deuterated aryl group having 6 to 20 carbon atoms, a heteroaryl group having 12 to 20 carbon atoms or a trialkylsilyl group having 3 to 12 carbon atoms; Optionally, in Ar 1 and Ar 2 , any two adjacent substituents form a ring.
  2. 2. The organic material according to claim 1, wherein the organic material is selected from compounds represented by formula a or formula B: In formulae a and B D, m, n, L, L 1 、L 2 、Ar 1 and Ar 2 are as defined in claim 1.
  3. 3. The organic material according to claim 1, wherein L is selected from a single bond, a substituted or unsubstituted arylene group having 6 to 12 carbon atoms; optionally, the substituents in L are the same or different and are each independently selected from deuterium, halogen group, cyano, alkyl group with 1-5 carbon atoms, phenyl group or pentadeuterated phenyl group.
  4. 4. The organic material of claim 1, wherein L is selected from the group consisting of a single bond, a substituted or unsubstituted phenylene, a substituted or unsubstituted naphthylene, a substituted or unsubstituted biphenylene; Alternatively, the substituents in L are the same or different and are each independently selected from deuterium, fluoro, cyano, methyl, ethyl, n-propyl, isopropyl, tert-butyl, phenyl or pentadeuterated phenyl.
  5. 5. The organic material according to claim 1, wherein L 1 and L 2 are the same or different and are each independently selected from a single bond, a substituted or unsubstituted arylene group having 6 to 15 carbon atoms, a substituted or unsubstituted heteroarylene group having 12 to 18 carbon atoms; Optionally, the substituents in L 1 and L 2 are the same or different and are each independently selected from deuterium, halogen group, cyano, alkyl with 1-5 carbon atoms, phenyl, naphthyl or pentadeuterated phenyl.
  6. 6. The organic material according to claim 1, wherein L 1 and L 2 are the same or different and are each independently selected from the group consisting of a single bond, a substituted or unsubstituted phenylene group, a substituted or unsubstituted naphthylene group, a substituted or unsubstituted biphenylene group, a substituted or unsubstituted fluorenylene group, a substituted or unsubstituted anthrylene group, a substituted or unsubstituted phenanthrylene group, a substituted or unsubstituted carbazolylene group, a substituted or unsubstituted dibenzothiophene group, a substituted or unsubstituted dibenzofuran group; Alternatively, the substituents in L 1 and L 2 are the same or different and are each independently selected from deuterium, fluoro, cyano, methyl, ethyl, n-propyl, isopropyl, t-butyl, phenyl, naphthyl or pentadeuterated phenyl.
  7. 7. The organic material according to claim 1, wherein Ar 1 and Ar 2 are the same or different and are each independently selected from a substituted or unsubstituted aryl group having 6 to 26 carbon atoms, a substituted or unsubstituted heteroaryl group having 12 to 24 carbon atoms; Optionally, the substituents in Ar 1 and Ar 2 are the same or different, and are respectively and independently selected from deuterium, halogen groups, cyano groups, alkyl groups with 1-5 carbon atoms, phenyl groups, naphthyl groups or pentadeuterated phenyl groups; Optionally, in Ar 1 and Ar 2 , any two adjacent substituents form a fluorene ring.
  8. 8. The organic material according to claim 1, wherein Ar 1 and Ar 2 are the same or different and are each independently selected from the group consisting of substituted or unsubstituted phenyl, substituted or unsubstituted naphthyl, substituted or unsubstituted biphenyl, substituted or unsubstituted terphenyl, substituted or unsubstituted phenanthryl, substituted or unsubstituted anthryl, substituted or unsubstituted pyrenyl, substituted or unsubstituted triphenylene, substituted or unsubstituted fluorenyl, substituted or unsubstituted spirobifluorenyl, substituted or unsubstituted carbazolyl, substituted or unsubstituted dibenzofuranyl, substituted or unsubstituted dibenzothiophenyl; Alternatively, the substituents in Ar 1 and Ar 2 are the same or different and are each independently selected from the group consisting of fluoro, cyano, methyl, ethyl, n-propyl, isopropyl, t-butyl, phenyl, naphthyl, and pentadeuterated phenyl.
  9. 9. The organic material according to claim 1, wherein in formula 1 Identical or different and are each independently selected from the group consisting of: Alternatively, the process may be carried out in a single-stage, Identical or different and are each independently selected from the group consisting of:
  10. 10. The organic material according to claim 1, wherein in formula 1 Selected from the group consisting of: Alternatively, in formula 1 Selected from the group consisting of:
  11. 11. the organic material of claim 1, wherein the organic material is selected from the group consisting of:
  12. 12. the organic electroluminescent device is characterized by comprising an anode and a cathode which are oppositely arranged, and a functional layer arranged between the anode and the cathode; the functional layer comprises the organic material according to any one of claims 1 to 11; Optionally, the functional layer comprises an organic light emitting layer, the organic light emitting layer comprising the organic material of any one of claims 1-11; optionally, the functional layer further includes a hole injection layer, a hole transport layer, a luminescence adjustment layer, an electron transport layer, and an electron injection layer.
  13. 13. An electronic device comprising the organic electroluminescent device as claimed in claim 12.

Description

Organic material, organic electroluminescent device, and electronic apparatus Technical Field The application relates to the technical field of organic electroluminescence, in particular to an organic material, an organic electroluminescent device and an electronic device containing the organic material. Background Since 1987, organic electroluminescent devices (Organic electroluminescent devices, OLEDs) have become a well-known next-generation flat panel display technology. OLEDs are self-luminescent devices in which when charges (electrons and holes) are injected into an organic film between an anode and a cathode, the electrons and holes recombine to form excitons and transfer energy to a light-emitting molecule, thereby exciting electrons to transition from a ground state to an excited state, and the excited state energy is deactivated by radiation to emit light. OLEDs have the advantages of self-luminescence, low driving voltage, light weight, wide luminous visual angle, high response speed, bending and folding performances, low energy consumption, large-area production and the like, so that the OLEDs have wide application prospects in the fields of information display and solid-state illumination. The traditional organic fluorescent material can only emit light by using 25% singlet excitons formed by electric excitation, and the internal quantum efficiency of the device is low (25% at maximum). External quantum efficiency is generally lower than 5%, and there is a great gap from the efficiency of phosphorescent devices. The phosphorescent material enhances intersystem crossing due to strong spin-orbit coupling of heavy atom center, and can effectively utilize singlet excitons and triplet excitons formed by electric excitation to emit light, so that the internal quantum efficiency of the device reaches 100%. The prior art discloses host materials that can be used to prepare organic light-emitting layers in organic electroluminescent devices. However, there is still a need to continue to develop new materials to further improve the performance of organic electroluminescent devices. Disclosure of Invention In view of the foregoing problems in the prior art, an object of the present application is to provide an organic material, an organic electroluminescent device and an electronic apparatus including the same, where the organic material is used in the organic electroluminescent device, and the performance of the device can be improved. A first aspect of the present application provides an organic material having a structure as shown in formula 1: wherein D represents deuterium, m and n are the number of D, n is selected from 0,1, 2, 3, 4, 5, 6 or 7;m is selected from 0,1, 2, 3 or 4; L, L 1 and L 2 are the same or different and are each independently selected from a single bond, a substituted or unsubstituted arylene group having 6 to 30 carbon atoms, and a substituted or unsubstituted heteroarylene group having 3 to 30 carbon atoms; Ar 1 and Ar 2 are the same or different and are each independently selected from a substituted or unsubstituted aryl group having 6 to 40 carbon atoms and a substituted or unsubstituted heteroaryl group having 3 to 40 carbon atoms; L, L 1、L2、Ar1 and Ar 2 are the same or different and are each independently selected from deuterium, a halogen group, a cyano group, an alkyl group having 1 to 10 carbon atoms, a deuterated alkyl group having 1 to 10 carbon atoms, a cycloalkyl group having 3 to 10 carbon atoms, an aryl group having 6 to 20 carbon atoms, a deuterated aryl group having 6 to 20 carbon atoms, a heteroaryl group having 12 to 20 carbon atoms or a trialkylsilyl group having 3 to 12 carbon atoms; Optionally, in Ar 1 and Ar 2, any two adjacent substituents form a ring. A second aspect of the present application provides an organic electroluminescent device comprising an anode and a cathode disposed opposite each other, and a functional layer disposed between the anode and the cathode, the functional layer comprising the organic material disclosed in the first aspect of the present application. A third aspect of the application provides an electronic device comprising the organic electroluminescent device disclosed in the second aspect of the application. The application provides an organic material which consists of phenanthro [3,2-b ] benzofuran and triazine, wherein the triazine is connected to a specific position of the phenanthro [3,2-b ] benzofuran. Wherein, the phenanthro [3,2-b ] benzofuran has large plane and stronger rigidity, can improve the stability of materials, and the specific position of the phenanthro [3,2-b ] benzofuran is connected with triazine, so that the electron mobility of the compound can be improved. Therefore, when the organic material is used as an electronic main body material of the organic light-emitting layer, the carrier balance in the organic light-emitting layer can be obviously improved, the stability of the film is improved, and the li