Thermal activation delayed fluorescent material, preparation method thereof and electroluminescent device

An electroluminescence device, thermal activation delay technology, applied in the direction of luminescent materials, electric solid devices, chemical instruments and methods, etc., can solve the problem of lack of thermal activation delay fluorescent materials, etc., to achieve easy purification, high yield, high luminescence efficiency effect

Inactive Publication Date: 2019-12-20
WUHAN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a thermally activated delayed fluorescent material and its preparation method, and an electroluminescent device, so as to solve the problems in the prior art such as the lack of thermally activated delayed fluorescent materials relative to heavy metal iridium complexes.

Method used

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  • Thermal activation delayed fluorescent material, preparation method thereof and electroluminescent device
  • Thermal activation delayed fluorescent material, preparation method thereof and electroluminescent device
  • Thermal activation delayed fluorescent material, preparation method thereof and electroluminescent device

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Embodiment 1

[0038] An embodiment of the present invention provides a thermally activated delayed fluorescent material. The thermally activated delayed fluorescent material includes an electron donor and an electron acceptor, and the electron acceptor has an azaaromatic ring structure and is connected to the aza The diphenylamine structure and the tetramethylbenzene structure of the aromatic ring structure have a general structural formula:

[0039]

[0040] Wherein, in the general structural formula of the thermally activated delayed fluorescent material, R is an aromatic compound, and its structure is:

[0041]

[0042] Specifically, in the embodiment of the present invention, the general structural formula of the thermally activated delayed fluorescent material is:

[0043]

[0044] The embodiment of the present invention also provides a preparation method of thermally activated delayed fluorescent material, the preparation process is as follows figure 1 As shown, the specific...

Embodiment 2

[0052] An embodiment of the present invention provides a thermally activated delayed fluorescent material. The thermally activated delayed fluorescent material includes an electron donor and an electron acceptor, and the electron acceptor has an azaaromatic ring structure and is connected to the aza The diphenylamine structure and the tetramethylbenzene structure of the aromatic ring structure have a general structural formula:

[0053]

[0054] Wherein, in the general structural formula of the thermally activated delayed fluorescent material, R is an aromatic compound, and its structure is:

[0055]

[0056] Specifically, in the embodiment of the present invention, the general structural formula of the thermally activated delayed fluorescent material is:

[0057]

[0058] The embodiment of the present invention also provides a preparation method of thermally activated delayed fluorescent material, the preparation process is as follows figure 1 As shown, the specific...

Embodiment 3

[0066] An embodiment of the present invention provides a thermally activated delayed fluorescent material. The thermally activated delayed fluorescent material includes an electron donor and an electron acceptor, and the electron acceptor has an azaaromatic ring structure and is connected to the aza The diphenylamine structure and the tetramethylbenzene structure of the aromatic ring structure have a general structural formula:

[0067]

[0068] Wherein, in the general structural formula of the thermally activated delayed fluorescent material, R is an aromatic compound, and its structure is:

[0069]

[0070] Specifically, in the embodiment of the present invention, the general structural formula of the thermally activated delayed fluorescent material is:

[0071]

[0072] The embodiment of the present invention also provides a preparation method of thermally activated delayed fluorescent material, the preparation process is as follows figure 1 As shown, the specific...

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Abstract

The invention provides a thermal activation delayed fluorescent material, a preparation method thereof and an electroluminescent device. The thermal activation delayed fluorescent material comprises an electron donor and an electron acceptor, and the electron acceptor has an aza aromatic ring structure, and a diphenylamine structure and a tetramethylbenzene structure which are connected to the azaaromatic ring structure, wherein the electron donor is an aromatic compound. The heat-activated delayed fluorescent material has a low singlet-triplet energy level difference, high luminous efficiency and a high reverse intersystem crossing constant.

Description

technical field [0001] The invention relates to the technical field of organic electroluminescent diode materials, in particular to a heat-activated delayed fluorescent material, a preparation method thereof, and an electroluminescent device. Background technique [0002] Organic light-emitting diodes (Organic Light-Emitting Diodes, OLED) do not need a backlight source for their active luminescence, high luminous efficiency, large viewing angle, fast response speed, wide temperature range, relatively simple production and processing technology, and low driving voltage. , low energy consumption, lighter and thinner, flexible display and other advantages, as well as huge application prospects, have attracted the attention of many researchers. In OLEDs, the dominant light-emitting guest material is crucial. The luminescent guest materials used in early OLEDs are fluorescent materials. Since the ratio of singlet and triplet excitons in OLEDs is 1:3, the theoretical internal qua...

Claims

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Application Information

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IPC IPC(8): C09K11/06C07D487/16H01L51/50H01L51/54
CPCC09K11/06C07D487/16C09K2211/1007C09K2211/1014C09K2211/1059C09K2211/1029C09K2211/1088C09K2211/1092H10K85/6576H10K85/6574H10K85/6572H10K50/11
Inventor 罗佳佳
Owner WUHAN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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