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A thermally activated delayed fluorescent green light polymer material and its preparation method

A thermally activated delay polymer material technology, applied in the field of thermally activated delayed fluorescent green light polymer materials and its preparation, can solve the problems of low luminous efficiency and achieve high luminous efficiency, stable performance, and fast crossing constant effects

Active Publication Date: 2021-04-27
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

[0006] The purpose of the present invention is to provide a thermally activated delayed fluorescence deep red polymer material and its preparation method and application, so as to solve the problem of low luminous efficiency of organic light emitting diodes in the prior art

Method used

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  • A thermally activated delayed fluorescent green light polymer material and its preparation method
  • A thermally activated delayed fluorescent green light polymer material and its preparation method
  • A thermally activated delayed fluorescent green light polymer material and its preparation method

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preparation example Construction

[0071] The present invention also provides a preparation method for preparing the heat-activated delayed fluorescence green light polymer material involved in the present invention, which includes the following steps:

[0072] Add benzene compounds containing boron ring structure, benzene compounds with nitrogen ring structure, palladium acetate and tri-tert-butylphosphine tetrafluoroborate into the reaction flask, in the benzene compounds with nitrogen ring structure, the The nitrogen ring structure forms an amino group; the chemical structural formula of the stupid compounds containing the boron ring structure is as follows:

[0073]

[0074] Put the reaction bottle in a glove box, add NaOt-Bu into the glove box, inject toluene under an argon atmosphere, react at 100-140°C for 20-30 hours, and cool to room temperature to obtain a mixed solution Pour the mixed solution into ice water, extract the organic phase in the mixed solution by dichloromethane multiple times, combin...

Embodiment 1

[0076] In this embodiment, the benzene compound of the nitrogen-containing ring structure is carbazole, and the chemical structural formula of the carbazole is

[0077]

[0078] The chemical structural formula of the thermally activated delayed fluorescent green polymer material is:

[0079]

[0080] Its synthetic route is as follows:

[0081]

[0082] The preparation method of the thermally activated delayed fluorescent green polymer material comprises the following steps:

[0083] Add 5mmol benzene compound containing boron ring structure, 6mmol carbazole, 0.4mmol palladium acetate and 1.2mmol tri-tert-butylphosphine tetrafluoroborate in the reaction bottle, place the reaction bottle in the glove box, and Add 12mmol NaOt-Bu into the glove box, inject 120mL of toluene that has been dehydrated and deoxygenated in advance under an argon atmosphere, react at 100-140°C for 20-30 hours, and cool to room temperature to obtain a mixed solution; the mixed solution Pour int...

Embodiment 2

[0085] In this embodiment, the benzene compound of the nitrogen-containing ring structure is phenoxazine, and the chemical structural formula of the phenoxazine is

[0086]

[0087] The chemical structural formula of the thermally activated delayed fluorescent green polymer material is:

[0088]

[0089] Its synthetic route is as follows:

[0090]

[0091] The preparation method of the thermally activated delayed fluorescent green polymer material comprises the following steps:

[0092] Add 5 mmol of benzene compounds containing boron ring structure, 6 mmol of phenoxazine, 0.4 mmol of palladium acetate and 1.2 mmol of tri-tert-butylphosphine tetrafluoroborate into the reaction flask, place the reaction flask in a glove box, and Add 12mmolNaOt-Bu into the glove box, inject 120mL of toluene that has been dehydrated and deoxygenated in advance under an argon atmosphere, react at 100-140°C for 20-30 hours, and cool to room temperature to obtain a mixed solution; The sol...

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Abstract

The invention provides a thermally activated delayed fluorescent green light polymer material and its organic electroluminescent device. The thermally activated delayed fluorescent green light polymer material is based on boron structure, and the overall charge transfer is adjusted by different electron donating units. Strong and weak, a series of green thermally activated delayed fluorescent materials with lower singlet triplet energy level difference, high luminous efficiency, and fast reverse intersystem crossing constant have been synthesized, and at the same time, the electron-donating ability of the electron-donating unit has been fine-tuned so that Spectral fine-tuning. Using the thermally activated delayed fluorescent green light polymer material as the light-emitting layer can improve the light-emitting efficiency of the device, and the performance of the light-emitting device is more stable.

Description

technical field [0001] The invention belongs to the technical field of organic photoelectric materials, in particular to a thermally activated delayed fluorescent green light polymer material and a preparation method thereof. Background technique [0002] Organic light emitting diode (Organic Light Emitting Diode, referred to as OLED) does not need a backlight source for its active light emission, high luminous efficiency, large viewing angle, fast response speed, wide temperature range, relatively simple production and processing technology, low driving voltage, and high performance. The advantages of low power consumption, lighter and thinner, flexible display and huge application prospects have attracted the attention of many researchers. In OLEDs, the dominant light-emitting guest material is crucial. The luminescent materials used in early OLEDs are fluorescent materials. Since the ratio of singlet and triplet excitons in OLEDs is 1:3, the theoretical internal quantum ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F5/02C09K11/06H01L51/50H01L51/54
CPCC07F5/027C09K11/06C09K2211/1029C09K2211/1096C09K2211/1088C09K2211/104C09K2211/1033H10K85/322H10K85/6572H10K50/11
Inventor 罗佳佳严舒星
Owner WUHAN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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