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Thermally activated delayed fluorescent material and preparation method and application thereof

A technology of thermally activated delayed fluorescent materials, applied in the fields of luminescent materials, chemical instruments and methods, semiconductor/solid-state device manufacturing, etc., can solve the problems of short thermally activated delayed fluorescence lifetime, difficult synthesis, disappearance of afterglow, etc., and achieve high practical promotion The effect of application value, low preparation cost and low usage

Active Publication Date: 2021-12-14
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, thermally activated delayed fluorescence usually has a short lifetime (mostly less than 50 milliseconds), and there are few thermally activated delayed fluorescent systems with long-lived luminescent lifetimes.
[0003] Long-lasting luminescent materials mainly include organic small molecule crystals, polar polymer doped type and carbon dots. Most of the existing organic small molecule crystals and carbon dot materials are generally difficult to synthesize, while polar polymers Doped long-lasting luminescent materials have the problem of absorbing moisture in the air and causing afterglow to disappear. Polar polymer-doped long-lasting luminescent materials will cause afterglow to disappear completely after only a few hours. Therefore, long-lasting luminescent materials are used in There are great limitations in practical application

Method used

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  • Thermally activated delayed fluorescent material and preparation method and application thereof
  • Thermally activated delayed fluorescent material and preparation method and application thereof
  • Thermally activated delayed fluorescent material and preparation method and application thereof

Examples

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Embodiment 1

[0035] The preparation method of the thermally activated delayed fluorescent material of this embodiment includes the following steps: polyethylene-polyvinyl alcohol copolymer, figure 1 Compound No. 1 in the method is dissolved together in water to form a mixed solution, and after evaporating the water, it is dried to obtain a heat-activated delayed fluorescent material;

[0036] Wherein, every 1KG polyethylene-polyvinyl alcohol copolymer is mixed with 0.25mmol No. 1 compound;

[0037] The molar percentage of polyethylene monomer in the polyethylene-polyvinyl alcohol copolymer is 20%, and the molar percentage of polyvinyl alcohol monomer is 80%.

[0038] The thermally activated delayed fluorescent material of the present embodiment is subjected to a performance test, wherein the fluorescence spectrum and quantum efficiency are measured by a steady-state fluorescence spectrometer, such as the FLS-1000 steady-state fluorescence spectrometer in Edinburgh, UK, wherein the fluoresc...

Embodiment 2

[0041] The preparation method of the thermally activated delayed fluorescent material of this embodiment includes the following steps: polyethylene-polyvinyl alcohol copolymer, figure 1 Compound No. 1 in the method is dissolved together in water to form a mixed solution, and after evaporating the water, it is dried to obtain a heat-activated delayed fluorescent material;

[0042] Wherein, every 1KG polyethylene-polyvinyl alcohol copolymer is mixed with 10mmol No. 1 compound;

[0043] The molar percentage of polyethylene monomer in the polyethylene-polyvinyl alcohol copolymer is 20%, and the molar percentage of polyvinyl alcohol monomer is 80%.

[0044] Using the same test method as in Example 1, it was determined that the thermally activated delayed fluorescent material prepared in this example had a maximum fluorescence / thermally activated delayed fluorescence wavelength of 502 nm and a quantum efficiency of 35%. Compared with Example 1, in this example, because the amount o...

Embodiment 3

[0046] The preparation method of the thermally activated delayed fluorescent material of this embodiment includes the following steps: polyethylene-polyvinyl alcohol copolymer, figure 1 The No. 1 compound in the method is dissolved in ethylene glycol together to form a mixed solution, and after evaporating ethylene glycol, it is dried to obtain a heat-activated delayed fluorescent material;

[0047] Wherein, every 1KG polyethylene-polyvinyl alcohol copolymer is mixed with 10mmol No. 1 compound;

[0048] The molar percentage of polyethylene monomer in the polyethylene-polyvinyl alcohol copolymer is 20%, and the molar percentage of polyvinyl alcohol monomer is 80%.

[0049] Using the same test method as in Example 1, it was determined that the thermally activated delayed fluorescent material prepared in this example had a maximum fluorescence / thermally activated delayed fluorescence wavelength of 5485 nm and a quantum efficiency of 34%. Compared with Example 1, in this example,...

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Abstract

The invention provides a thermally activated delayed fluorescent material as well as a preparation method and application thereof, and relates to the technical field of organic light-emitting materials. The thermally activated delayed fluorescent material provided by the invention is formed by compounding a non-polar-polar copolymer with a microphase separation effect and an organic compound A, wherein the organic compound A comprises at least one selected from acridine, an acridine derivative, acridone and an acridone derivative. The thermally activated delayed fluorescent material is obtained by compounding the organic compound A with a specific structure and the copolymer with the microphase separation effect; the quantum efficiency of the thermally activated delayed fluorescent material is 15-74%; the visible time of delayed fluorescence to naked eyes is 2-10 seconds; and the thermally activated delayed fluorescent material has good water vapor stability.

Description

technical field [0001] The invention relates to the technical field of organic light-emitting materials, in particular to a heat-activated delayed fluorescent material and its preparation method and application. Background technique [0002] Fluorescence has been widely used in the field of anti-counterfeiting due to its simple lighting conditions and convenient use. For example, fluorescence technology is widely used on banknotes and commemorative coins in various countries. Long-lasting luminescence has a luminescence delay visible to the naked eye, and its photoluminescence behavior that varies with time scales is more difficult to imitate and replicate than conventional fluorescent anti-counterfeiting. Long-lasting luminescent materials are mainly divided into room-temperature phosphorescent materials and thermally activated delayed fluorescent materials. Generally speaking, room-temperature phosphorescent long-lasting luminescence will be significantly affected by non-r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/02C09K11/06H01L51/00H10K99/00
CPCC09K11/025C09K11/06C09K2211/1029H10K85/151H10K85/6572Y02B20/00
Inventor 洪炜
Owner SUN YAT SEN UNIV
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