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CN-121991083-A - Benzofuropyrimidine-containing organic compound and application thereof

CN121991083ACN 121991083 ACN121991083 ACN 121991083ACN-121991083-A

Abstract

The invention relates to the technical field of semiconductor material preparation, in particular to an organic compound containing benzofuropyrimidine groups and application thereof. According to the invention, a novel benzofuropyrimidine parent nucleus structure is introduced, and the benzofuropyrimidine parent nucleus group and the polypyridine group are specifically connected through the bridging group and the connection site thereof, so that the compound has good electron mobility and stability, and good electron tolerance and triplet state exciton inhibition capability, and the compound is used as an electron transport material in an organic electroluminescent device, so that the device driving voltage can be effectively reduced, and the device efficiency and service life are improved.

Inventors

  • ZHANG LEI
  • Request for anonymity
  • ZHANG HUAXING
  • WU KONGWU
  • ZHAO XIAOYU

Assignees

  • 浙江华显光电科技有限公司

Dates

Publication Date
20260508
Application Date
20260302

Claims (10)

  1. 1. An organic compound comprising a benzofuropyrimidine group, wherein the organic compound has a structure represented by formula (1): ; In formula (1), each L 1 、L 2 is the same or different and is a single bond or a C6-C36 arylene group; Ar and R 1 are the same or different and are selected from substituted or unsubstituted C6-C36 aryl and substituted or unsubstituted C5-C36 heteroaryl, when substituted, the substituents are independently selected from deuterium and cyano, X 1 -X 2 ,Y 1 -Y 3 ,Y 4 -Y 6 are each optionally one nitrogen atom, and the others are all carbon atoms.
  2. 2. An organic compound according to claim 1, wherein L 1 、L 2 is each represented, identically or differently, as a single bond or a phenylene group, ar and R 1 are identically or differently selected from any one or more of cyano-substituted or unsubstituted phenyl, biphenyl, naphthyl, pyridinyl.
  3. 3. The organic compound according to claim 1, wherein the organic compound has any one of structures represented by the formulas (I-1) to (I-3): ; The substitution choice of L 1 、L 2 、Ar、R 1 、X 1 -X 2 、Y 1 -Y 6 is defined as in the claim of formula (I).
  4. 4. The organic compound according to claim 1, wherein the compound of formula (I) The structure of (2) is selected from the following: 。
  5. 5. the organic compound according to claim 1, wherein the organic compound is selected from any one of the chemical structures shown below:
  6. 6. use of an organic compound according to any one of claims 1-5 for the preparation of an organic electroluminescent device.
  7. 7. An organic electroluminescent device, characterized in that the organic electroluminescent device comprises: A substrate layer; a first electrode over the substrate layer; an organic functional layer over the first electrode; A second electrode over the organic functional layer; And a light extraction layer over the second electrode, wherein the organic functional layer contains the organic compound according to any one of claims 1 to 5.
  8. 8. An organic electroluminescent device, characterized in that the organic functional layer comprises an electron transport layer, and the electron transport layer comprises the organic compound according to any one of claims 1 to 5.
  9. 9. A composition comprising one or more of the organic compounds of any one of claims 1-5.
  10. 10. A display or lighting device comprising one or more of the organic electroluminescent devices of claim 7.

Description

Benzofuropyrimidine-containing organic compound and application thereof Technical Field The invention relates to the technical field of semiconductor material preparation, in particular to an organic compound containing benzofuropyrimidine groups and application thereof. Background The organic electroluminescent devices (OLEDs) technology can be used for manufacturing novel display products and novel illumination products, is hopeful to replace the existing liquid crystal display and fluorescent lamp illumination, and has wide application prospect. The OLED device has a sandwich-like structure and comprises electrode material film layers and organic functional materials clamped between different electrode material film layers, and various organic functional materials are mutually overlapped together according to purposes to jointly form the OLED light-emitting device. When voltage is applied to the electrodes at the two ends of the OLED light-emitting device serving as a current device and positive and negative charges in the organic layer functional material film layer are acted through an electric field, the positive and negative charges are further compounded in the light-emitting layer, and thus OLED electroluminescence is generated. The OLED photoelectric functional materials applied to OLED devices can be divided into two main categories in terms of application, namely charge injection transport materials and luminescent materials. Further, the charge injection transport material may be classified into an electron injection transport material, an electron blocking material, a hole injection transport material, and a hole blocking material, and as the charge transport material, it is required to have good carrier mobility, high glass transition temperature, and the like, and for an OLED device, electrons are injected from a cathode and then transferred to a host material through an electron transport layer, and holes are recombined in the host material, thereby generating excitons. The electron transport material is the hot spot direction studied by expert scholars in all sides at present, and electrons and holes are more easily compounded by efficiently transporting the electrons to a light-emitting area, so that the service performance of the material is improved. However, the existing electron transport materials still have defects in improving the performance of devices, and even if a plurality of materials are used in combination, the display technology still has the problems of high driving voltage and short display service life, and further practical application of the technology is seriously affected. For example, prior art CN113840822a discloses an electron transport material with a triazine and pyridine structure, wherein the pyridine structure is terpyridine, and the terpyridine is directly bonded with the triazine through a phenyl group, the bonding manner leads to insufficient steric hindrance between the triazine and the pyridine, especially the electron density between two groups cannot be effectively separated, the electron mobility of the material is insufficient, the electron tolerance of the material is poor, and finally the driving voltage of the device is higher, and the efficiency and the service life of the device are reduced. CN117384134a discloses an electron transport material with a triazine and pyridine structure, wherein a branched chain is in a monopyridine structure, and the triazine and the monopyridine structure are connected, so that the molecular structure constructed by the monopyridine and the triazine cannot generate effective electron density separation, and during electron injection, the electron density on the monopyridine is enriched, so that the electron tolerance of the material is insufficient, and finally, the efficiency and the service life of the device are reduced. Thus, the electron transport material properties are constantly optimized by innovating molecular groups and optimizing the molecular bonding approach. In particular, improving the electron transport ability, electron tolerance, triplet exciton suppression ability, and glass transition temperature and stability of electron transport materials has become an important point and difficulty in research of high-performance electron transport materials. Disclosure of Invention Aiming at the technical problems existing in the prior art, the invention provides an organic compound containing benzofuropyrimidine groups and application thereof. Through introducing a novel benzofuropyrimidine parent nucleus structure, the benzofuropyrimidine parent nucleus group and the polypyridine group are specifically connected through a bridging group and a connecting site thereof, so that the compound has good electron mobility and stability, and has good electron tolerance and triplet state exciton inhibition capability, and the compound is used as an electron transport material in an organic electroluminescent dev