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A kind of organic long afterglow material and its preparation method and application

A long afterglow material and captain’s technology, which is applied in the direction of luminescent materials, chemical instruments and methods, can solve the problems of high cost of phosphorescent luminescent materials, short phosphorescence duration, and low phosphorescence intensity, so as to enrich the preparation methods and increase the phosphorescence intensity , the effect of wide source of raw materials

Active Publication Date: 2022-02-01
CHONGQING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the above-mentioned prior art, the purpose of the present invention is to provide an organic long-lasting afterglow material and its preparation method to solve the problems of high cost, non-room temperature phosphorescence behavior, low phosphorescence intensity, short phosphorescence duration and the existing phosphorescent luminescent materials. Process complexity and other issues

Method used

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  • A kind of organic long afterglow material and its preparation method and application
  • A kind of organic long afterglow material and its preparation method and application
  • A kind of organic long afterglow material and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0033] 1) Weigh 0.15g of polyvinyl alcohol (PVA) into a round bottom flask, then add 5ml of deionized water, raise the temperature to 95°C while stirring and keep it for 1.5h to obtain a 30g / L PVA solution.

[0034] 2) Weigh 0.1 mg of diphenylphosphonic anhydride and 4.9 mg of carbazole into the prepared PVA solution, stir ultrasonically at room temperature for 30 minutes, and prepare a mixed solution after mixing evenly, and then use a rubber dropper to uniformly mix the solution Distributed on glass, and baked at 60°C for 4 hours to obtain a transparent and uniform film material.

Embodiment 2

[0036] 1) Weigh 0.15g of polyvinyl alcohol (PVA) into a round bottom flask, then add 5ml of deionized water, raise the temperature to 95°C while stirring and keep it for 1h to obtain a 30g / L PVA solution.

[0037] 2) Weigh 0.4 mg of diphenylphosphonic anhydride and 4.6 mg of carbazole into the prepared PVA solution, stir ultrasonically at room temperature for 60 minutes, and prepare a mixed solution after mixing evenly, and then use a rubber dropper to uniformly mix the solution Distributed on glass, and baked at 90°C for 3 hours to obtain a transparent and uniform film material.

Embodiment 3

[0039] 1) Weigh 0.15g of polyvinyl alcohol (PVA) into a round bottom flask, then add 5ml of deionized water, raise the temperature to 95°C while stirring and keep it for 1.5h to obtain a 30g / L PVA solution.

[0040] 2) Weigh 0.6 mg of diphenylphosphonic anhydride and 4.4 mg of carbazole into the prepared PVA solution, stir ultrasonically at room temperature for 90 minutes, and prepare a mixed solution after mixing evenly, and then use a rubber dropper to uniformly mix the solution Distributed on glass, and baked at 100°C for 3 hours to obtain a transparent and uniform film material.

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Abstract

The invention discloses an organic long afterglow material and its preparation method and application, comprising a host molecule and a guest molecule, the host molecule is carbazole, and the guest molecule is diphenylphosphonic acid anhydride. The guest molecule and the host molecule are mixed according to a certain mass ratio and then doped into the polyvinyl alcohol solution, and then coated on the substrate, and dried to form a film to obtain an organic room temperature phosphorescent material. The preparation method is simple and easy to control, and the composition Simple. The material has good flexibility and transparency, and the phosphorescence intensity and duration of carbazole are significantly improved by doping guest molecules, and the afterglow duration can reach 22s. At the same time, it realizes fluorescence emission and phosphorescence emission at room temperature, has a high degree of concealment, is convenient to use, and is easy to identify, thereby realizing a higher level of anti-counterfeiting function, and has a good application prospect in the fields of organic photoelectric materials and anti-counterfeiting encryption.

Description

technical field [0001] The invention relates to the technical field of organic phosphorescent luminescent materials, in particular to an organic long afterglow material and its preparation method and application. Background technique [0002] Long Persistent Luminescence (LPL) materials are also called light storage luminescent materials, commonly known as luminous powder or long afterglow powder. Its luminescence principle is photoluminescence, that is, when excited by a light source, the excitation energy is stored in the excited state, and when the excitation stops, the energy is slowly released in the form of light. In 1996, Matsuzawa et al. published strontium aluminate (SrAl) doped with europium (Eu) and dysprosium (Dy). 2 o 4 ) system, the afterglow decay time can be as long as 10 hours and has high durability. Subsequently, this rare earth-activated aluminate long afterglow material became the basis of luminescent coatings, which was favored by the business commun...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/06C09K11/02
CPCC09K11/06C09K11/025C09K2211/1029
Inventor 杨朝龙王中豪苏艳张永锋张丹贾鹏高伟宸李又兵白竹煜杨巧梅刘欣
Owner CHONGQING UNIV OF TECH
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