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Boron-based compound and application thereof in organic electroluminescent device

A technology of boron-based compounds and compound structures, applied to boron-based compounds and their application in organic electroluminescent devices, can solve the problems of device efficiency roll-off, difficult and unstable processes of carrier transfer and energy transfer, etc. , to avoid annihilation or quenching, weaken non-radiative transitions, and improve thermodynamic stability

Pending Publication Date: 2022-03-04
WUHAN SUNSHINE OPTOELECTRONICS TECH CO LTD
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AI Technical Summary

Problems solved by technology

However, due to the wide bandgap of blue light materials, the carrier transport and energy transfer process in the electroluminescence process become difficult and unstable, especially at high current densities, the singlet-triplet annihilation (STA ), triplet-triplet annihilation (TTA), triplet-polaron annihilation (TPQ) and non-radiative attenuation caused by vibrational relaxation of excited state molecules, etc., will make the device efficiency roll-off very serious
So far, there is no organic boron semiconductor luminescent material whose performance can meet the industrial needs in the field of blue light

Method used

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  • Boron-based compound and application thereof in organic electroluminescent device
  • Boron-based compound and application thereof in organic electroluminescent device
  • Boron-based compound and application thereof in organic electroluminescent device

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Embodiment Construction

[0027] It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0028] Synthesis Example 1: Synthesis of Compound (2)

[0029] In the reactor, put 10-([1,1'-biphenyl]-4-yl)-2-chloro-7-phenyl-10hydrogen-phenoxazine (20mmol, 8.92g), 9hydrogen- Carbazole (20mmol, 3.34g), potassium carbonate (40mmol, 5.76g) and toluene 100mL, blow nitrogen, add cuprous iodide 0.38g (2mmol) and o-phenanthroline 0.72g (4mmol), heat and reflux and stir for 8h . The temperature was cooled to room temperature, filtered, the liquid phase was distilled under reduced pressure, mixed with the filter cake, and purified by silica gel column chromatography to obtain 8.65 g of the compound represented by the following chemical formula (2a), with a yield of 75%;

[0030]

[0031] In the reactor, the compound represented by the above (2a) (10mmol, 5.77g) was dissolved in 50mL of ...

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Abstract

The invention relates to a boron-based compound and application thereof in an organic electroluminescent device, and belongs to the technical field of photoelectric materials. According to the compound, dibenzo six-membered heterocycle is in nitrogen bond connection with dibenzo six-membered heterocycle groups such as carbazole or acridine and phenazine to form a main body, the center of the main body is subjected to boryl modification, and through mutual cooperation of the rigid large-conjugate main body and boryl of a weak receptor, the excited-state vibration relaxation of compound molecules is reduced, and the radiation transition rate of current carriers is increased; the substitution of phenyl, tert-butyl and other substituent groups on a host reduces the annihilation or quenching of intermolecular excitons, and a device prepared by using the compound as a light-emitting layer guest material is significantly improved in the aspects of light-emitting efficiency and service life.

Description

technical field [0001] The invention relates to the field of photoelectric materials, in particular, the invention relates to a boron-based compound and its application in organic electroluminescent devices. Background technique [0002] Compared with liquid crystal display (LCD), organic light emitting diode (OLED) has the advantages of self-illumination, wide viewing angle, high response speed, thinness, low temperature resistance, flexible display and double transparent display, etc., and has bright industrial prospects. In the process of OLED, the performance of the light-emitting material directly affects the efficiency and life of the device, which has become an important factor affecting the rapid development of OLED. [0003] In recent years, new π-conjugated organic unit materials containing organic boron and nitrogen co-intercalated have become a research hotspot in blue OLED material systems due to their good photophysical and electrochemical properties. However,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F5/02C09K11/06H01L51/50H01L51/54
CPCC07F5/02C09K11/06C09K2211/1055C09K2211/1011C09K2211/107C09K2211/1029C09K2211/1014C09K2211/1085H10K85/636H10K85/615H10K85/631H10K85/6572H10K85/657H10K50/12
Inventor 穆广园庄少卿陶康王林
Owner WUHAN SUNSHINE OPTOELECTRONICS TECH CO LTD
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