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CN-121991085-A - Organic compound, organic layer, use thereof and organic electroluminescent device

CN121991085ACN 121991085 ACN121991085 ACN 121991085ACN-121991085-A

Abstract

The application discloses an organic compound, an organic layer, application thereof and an organic electroluminescent device, and relates to the technical field of organic electroluminescent materials, wherein the general formula of the organic compound is shown as formula (I): the molecular structure of the organic compound has a larger plane conjugated structure, so that the molecular structure is very stable and has excellent charge transmission capability, and therefore, when the organic compound is applied to an organic electroluminescent device, the efficiency and the service life of the device can be improved, and the working voltage of the device can be reduced.

Inventors

  • LI YU
  • WANG XIANGCHENG

Assignees

  • 上海钥熠电子科技有限公司

Dates

Publication Date
20260508
Application Date
20241104

Claims (10)

  1. 1. An organic compound, which is characterized in that the structural formula of the organic compound is shown as a formula (I): In formula (I): X and Y are the same or different and are selected from the group consisting of O, S, se and NR, wherein R is selected from the group consisting of acyl, carbonyl, carboxylic acid, ester, cyano, isocyano, thiocyano, isocyanate, pentafluorosulfonyl, sulfinyl, sulfonyl, phosphinyloxy, partially fluorinated or perfluorinated C1-C12 alkyl, partially fluorinated or perfluorinated C3-C12 cycloalkyl, substituted or unsubstituted C6-C24 aryl, substituted or unsubstituted C3-C24 heteroaryl; R 1 and R 2 are the same or different and are selected from the group consisting of hydrogen, deuterium, halogen, nitroso, nitro, acyl, carbonyl, carboxylic acid, ester, cyano, isocyano, thiocyano, isocyanate, pentafluorosulfonyl, sulfinyl, sulfonyl, phosphinoxy, substituted or unsubstituted C6-C24 aryl, substituted or unsubstituted C3-C24 heteroaryl; A 1 and A 2 are identically or differently selected from the following formulae (II) or (III): Ar 1 is selected from substituted or unsubstituted C6-C24 aryl, substituted or unsubstituted C3-C24 heteroaryl; r ', R ", R'" are each, when present, identically or differently selected from electron withdrawing groups; any hydrogen in formula (I) may be substituted with deuterium.
  2. 2. The organic compound according to claim 1, wherein the electron withdrawing group is selected from the group consisting of halogen, nitroso, nitro, acyl, carbonyl, carboxylic acid, ester, cyano, isocyano, thiocyano, isocyanate, pentafluorosulfonyl, sulfinyl, sulfonyl, phosphinoxy, haloalkyl.
  3. 3. The organic compound according to claim 1, wherein in R 1 and R 2 , the substituted substituents are selected from one or more of deuterium, halogen, nitroso, nitro, acyl, carbonyl, carboxylic acid, ester, cyano, isocyano, thiocyano, isocyanate, pentafluorosulfonyl, sulfinyl, sulfonyl, phosphino, partially fluorinated or perfluorinated C1-C12 alkyl, partially fluorinated or perfluorinated C1-C6 alkoxy, wherein the substituents are the same or different from each other; And/or, in the R, the substituted substituent is selected from one or more of deuterium, nitro, cyano, halogen, partially fluorinated or perfluorinated C1-C12 alkyl, partially fluorinated or perfluorinated C1-C6 alkoxy, wherein the substituents are the same or different from each other; And/or, in Ar 1 , the substituted substituent is selected from one or more of deuterium, nitro, cyano, halogen, partially fluorinated or perfluorinated C1-C12 alkyl, partially fluorinated or perfluorinated C1-C6 alkoxy, wherein the substituents are the same or different from each other.
  4. 4. The organic compound according to claim 1, wherein the structural formula of the organic compound satisfies any one or more of the following characteristics: (1) The X and Y are identically or differently selected from O, S, se, NR, wherein R is selected from partially fluorinated or perfluorinated C1-C12 alkyl groups, preferably R is selected from partially fluorinated or perfluorinated C1-C3 alkyl groups; (2) At least one of R 1 and R 2 is a group with an electron withdrawing group, preferably R 1 and R 2 are the same or different and are selected from fluorine, cyano, substituted or unsubstituted phenyl, further, in R 1 and R 2 , the substituted substituent is preferably one or more of fluorine and cyano, wherein the substituents are the same or different from each other; (3) Preferably, in Ar 1 , the substituted substituent is selected from one or more of fluorine and cyano, wherein the substituents are the same or different; (4) R ', R ", R'" are each, identically or differently, selected from cyano, isocyano, thiocyano, isocyano.
  5. 5. The organic compound according to claim 1, characterized in that the organic compound is represented by any one of the following structural formulas: Wherein R 2 is selected from fluorine, cyano,
  6. 6. The organic compound according to claim 1, wherein the organic compound is selected from the group consisting of:
  7. 7. An organic layer comprising the organic compound according to any one of claims 1 to 6.
  8. 8. Use of the organic compound according to any one of claims 1 to 6 or the organic layer according to claim 7 in an organic electroluminescent device.
  9. 9. An organic electroluminescent device comprising a first electrode, a second electrode, and the organic layer of claim 7 between the first electrode and the second electrode.
  10. 10. The organic electroluminescent device according to claim 9, the organic layer comprising a hole injection layer and/or a charge generation layer, wherein the hole injection layer and/or the charge generation layer comprises the organic compound according to any one of claims 1 to 6.

Description

Organic compound, organic layer, use thereof and organic electroluminescent device Technical Field The application relates to the technical field of organic electroluminescent materials, in particular to an organic compound, an organic layer, application thereof and an organic electroluminescent device. Background An Organic Light-Emitting Diode (OLED) is a type of spontaneous electronic device that converts electrical energy into Light energy, and has the characteristics of high brightness, wide material selection range, low driving voltage, full-curing active Light emission, and the like, and meanwhile has the advantages of high definition, wide viewing angle, high-speed response capable of smoothly displaying animation, and the like, so that the Organic Light-Emitting Diode is widely focused by academia and industry. In recent years, the duty ratio of displays using organic electroluminescent devices in the consumer electronics field has increased year by year, which requires the displays to be driven at low power while the device lifetime and luminous efficiency are not lower than other conventional displays. Therefore, it is necessary to develop a functional layer material having stable chemical structure and excellent performance. Many OLED functional materials are also developed, but their performance still cannot meet the market demand. Therefore, an organic electroluminescent material excellent in luminescence without breaking is demanded. Disclosure of Invention The application solves the technical problem of improving the performance of the organic electroluminescent device. In order to solve the technical problems, the application provides the following technical scheme: The first aspect of the present application provides an organic compound having a structural formula shown in formula (I): In formula (I), X and Y are identically or differently selected from the group consisting of O, S, se and NR, where R is chosen from the group consisting of acyl, carbonyl, carboxylic acid, ester, cyano, isocyano, thiocyano, isocyanate, pentafluorosulfonyl, sulfinyl, sulfonyl, phosphinoxy, partially fluorinated or perfluorinated C1-C12 alkyl, partially fluorinated or perfluorinated C3-C12 cycloalkyl, substituted or unsubstituted C6-C24 aryl, substituted or unsubstituted C3-C24 heteroaryl, R 1 and R 2 are identically or differently selected from the group consisting of hydrogen, deuterium, halogen, nitroso, nitro, acyl, carbonyl, carboxylic acid, ester, cyano, isocyano, thiocyano, isocyanate, pentafluorosulfonyl, sulfinyl, sulfonyl, phosphinoxy, substituted or unsubstituted C6-C24 aryl, substituted or unsubstituted C3-C24 heteroaryl, R 1 and R 2 are identically or differently selected from the group consisting of hydrogen, deuterium, halogen, nitroso, acyl, carbonyl, carboxyl, ester, cyano, isocyano, isocyanate, pentafluorosulfonyl, sulfonyl, phosphonyloxy, substituted or unsubstituted C6-C24 aryl, substituted or unsubstituted C3-C24 heteroaryl, and A is identically or differently selected from the group consisting of formula (34) and (34) III: Ar 1 is selected from substituted or unsubstituted aryl of C6-C24 and substituted or unsubstituted heteroaryl of C3-C24, R 'and R' are respectively selected from electron withdrawing groups identically or differently when being present, and any hydrogen in the formula (I) can be substituted by deuterium. A second aspect of the present application provides an organic layer comprising an organic compound as described in any one of the preceding claims. A third aspect of the present application provides the use of an organic compound as defined in any one of the preceding claims or an organic layer as defined above in an organic electroluminescent device. A fourth aspect of the present application provides an organic electroluminescent device comprising a first electrode, a second electrode and the above-described organic layer between the first electrode and the second electrode. The molecular structure of the organic compound has a larger plane conjugated structure, so that the molecular structure is very stable and has excellent charge transmission capability, and therefore, when the organic compound is applied to an organic electroluminescent device, the efficiency and the service life of the device can be improved, and the working voltage of the device can be reduced. Drawings The following drawings describe in detail exemplary embodiments disclosed in the present application. Wherein like reference numerals refer to like structure throughout the several views of the drawings. Those of ordinary skill in the art will understand that these embodiments are non-limiting, exemplary embodiments, and that the drawings are for illustration and description only and are not intended to limit the scope of the application, as other embodiments may equally well accomplish the inventive intent in this disclosure. It should be understood that the drawings are not to scale. Wherein