Afterglow slurry based on d-a type organic doped crystal afterglow material and its preparation method and application

A D-A, acceptor material technology, applied in the direction of organic chemistry, organic chemistry, luminescent materials, etc., can solve the problems of limiting organic afterglow slurry, loss of afterglow performance, short afterglow time, etc., and achieve good afterglow luminescence performance and stable performance Good, easily degradable effect

Active Publication Date: 2021-05-25
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current organic long afterglow materials have the problems of low stability, easy loss of afterglow performance in solvents, and short afterglow time, which will greatly limit the practical application of organic afterglow slurries

Method used

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  • Afterglow slurry based on d-a type organic doped crystal afterglow material and its preparation method and application
  • Afterglow slurry based on d-a type organic doped crystal afterglow material and its preparation method and application
  • Afterglow slurry based on d-a type organic doped crystal afterglow material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～4

[0084] A preparation method for afterglow slurry, comprising the following steps:

[0085] In the glove box, under nitrogen, add 600mg PVP (polyvinylpyrrolidone) and M mg D-A type organic doped crystal afterglow material (W / PPT) into 3mL absolute ethanol, stir for 6h, and make PVP, D-A type organic doped Mix the mixed crystal afterglow material and absolute ethanol evenly to obtain a white paste slurry. The value of M is detailed in Table 1.

[0086] Table 1

[0087] Example M value (unit: mg) Example 1 500 Example 2 400 Example 3 300 Example 4 200

[0088] In Examples 1-4, the preparation method of D-A type organic doped crystal afterglow material comprises the following steps:

[0089] Mix the donor material D (W) and the acceptor material A (PPT) uniformly to obtain a solid powder, add the solid powder to absolute ethanol to obtain a suspension, ultrasonicate the suspension for 1 min, and then place it in an atmospheric environment...

Embodiment 1

[0103] The state of the controllable pattern printed by the afterglow paste obtained in Example 1 when it is not excited by the excitation light is as follows: Figure 9 shown. After printing, the controllable pattern is transparent without any trace of printing. Under the excitation of 365nm purple light (excitation intensity is 75mW), the fluorescent color emitted by the controllable pattern on the substrate is blue, such as image 3 As shown in a; the excitation light source is removed after the purple light is excited for 1 second, and the controllable pattern on the substrate will show a clear green afterglow, as shown in image 3 As shown in b; in the 2s after the excitation light source is removed, the afterglow brightness of the controllable pattern on the substrate is strong, as shown in image 3 as shown in c;

[0104] At 4s after removing the excitation light source, the afterglow of the controllable pattern on the substrate is still obvious as image 3 shown in...

Embodiment 5

[0109] A preparation method for afterglow slurry, comprising the following steps:

[0110] In the glove box, under nitrogen, add 600mg PVP (polyvinylpyrrolidone) and 500mg D-A type organic doped crystal afterglow material (2M-W / PPT) into 3mL absolute ethanol, stir for 6h, and make PVP, D-A type organic The doped crystal afterglow material is mixed evenly with absolute ethanol to obtain a white paste slurry.

[0111] The preparation method of D-A type organic doped crystal afterglow material (2M-W / PPT) in embodiment 5 comprises the following steps:

[0112] Mix the donor material D (2M-W) and the acceptor material A (PPT) uniformly to obtain a solid powder, add the solid powder to anhydrous ethanol to obtain a suspension, ultrasonicate the suspension for 2 minutes, and then place it in a room temperature of 20-25°C After standing for 3 hours in the atmosphere, the crystals produced at the bottom of the liquid are D-A type organic doped crystal afterglow materials (2M-W / PPT). C...

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Abstract

The invention discloses an afterglow slurry based on a D-A type organic doped crystal afterglow material and its preparation method and application. The preparation method of the afterglow slurry comprises the following steps: in a nitrogen or inert gas environment, PVP, The D-A type organic doped crystal afterglow material that can be excited by ultraviolet-visible light is mixed with absolute ethanol, stirred until uniformly dispersed, and a white paste slurry is obtained. The afterglow slurry of the present invention has good stability, the D-A type organic doped crystal afterglow material is easy to be compatible with organic solvents, and the afterglow slurry is easy to print on a flexible substrate and is easy to degrade. It remains transparent in the excited state, appears blue in the ultraviolet excited state, and emits a green afterglow after the ultraviolet excitation is removed. After the afterglow slurry of the present invention is formed into an afterglow slurry layer, it can be packaged to isolate it from the air and prolong its service life.

Description

technical field [0001] The invention belongs to the technical field of organic long afterglow crystal materials, and specifically relates to an afterglow slurry based on a D-A type organic doped crystal 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, such long afterglow materials such as aluminates containing rare earth elements have been...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F9/6553C07C211/61C09K11/06B41M1/12
CPCB41M1/12C07B2200/13C07C211/61C07F9/655354C09K11/06C09K2211/1007C09K2211/1011C09K2211/1014C09K2211/1092
Inventor 汪天洋胡文平冯文慧韩江丽
Owner TIANJIN UNIV
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