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Manufacturing method and application of non-reproducible perovskite fluorescent anti-counterfeit label

An anti-counterfeiting label and a production method technology are applied in the production field of perovskite fluorescent anti-counterfeiting labels, which can solve the problems of slow comparison speed, easy cloning of pattern details, cost, and difficulty in identification.

Active Publication Date: 2021-04-09
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention proposes a new method for preparing perovskite fluorescent film anti-counterfeiting labels, which solves the problems of single anti-counterfeiting pattern, slow comparison speed, difficult identification in dark environment, easy cloning of pattern details and high cost

Method used

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  • Manufacturing method and application of non-reproducible perovskite fluorescent anti-counterfeit label
  • Manufacturing method and application of non-reproducible perovskite fluorescent anti-counterfeit label
  • Manufacturing method and application of non-reproducible perovskite fluorescent anti-counterfeit label

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Example 1: Verifying the Effect of Temperature on Pattern Shape Profile

[0048] A method for making an irreproducible perovskite fluorescent anti-counterfeiting label, comprising the steps of:

[0049] Step 1), preparing a substrate with a patterned lyophilic array: using a glass sheet as a substrate, plasma (plasma cleaning equipment) cleans the surface of the substrate, and evaporates a layer of perfluorooctyltriethoxysilane on the cleaned substrate surface lyophobic treatment, followed by nanosecond UV laser etching to destroy the lyophobic surface, exposing patterned hydrophilic regions (e.g. figure 1 shown in a1), obtain a substrate with a patterned hydrophilic-lyophobic array;

[0050] Step 2), preparation of the precursor droplet array substrate: CsBr and PbBr 2 At the same time, it was dissolved in DMSO (dimethyl sulfoxide) solvent to configure a 0.1M perovskite precursor, and then use a pipette gun to take out 10 μL of the precursor solution and place it in ...

Embodiment 2

[0053] Embodiment 2: Verify the method for preparing hollowed-out patterns

[0054] A method for making an irreproducible perovskite fluorescent anti-counterfeiting label, comprising the steps of:

[0055] Step 1), preparing a substrate with a patterned lyophilic and lyophobic array: use a glass sheet as the substrate, clean the surface of the substrate with plasma, and evaporate a layer of perfluorooctyltriethoxysilane on the cleaned substrate for surface lyophobic treatment , and then use nanosecond ultraviolet laser etching to destroy the lyophobic surface, exposing the patterned hydrophilic region, and obtaining a substrate with a patterned lyophobic array; the set pattern is a ring line, and the ring line of the control group is fully closed ( Such as figure 2 a), a small gap is set on the circular line of the test group (such as figure 2 b).

[0056] Step 2), with embodiment 1.

[0057] Step 3), heating the substrate to obtain a perovskite fluorescent anti-counterf...

Embodiment 3

[0060] Embodiment 3: prepare the solid pattern of different shape profile

[0061] Step 1), preparing a substrate with a patterned lyophilic and lyophobic array: use a glass sheet as the substrate, clean the surface of the substrate with plasma, and evaporate a layer of perfluorooctyltriethoxysilane on the cleaned substrate for surface lyophobic treatment , and then use nanosecond ultraviolet laser etching to destroy the lyophobic surface, exposing the patterned hydrophilic region, and obtaining a substrate with a patterned lyophilic array; designing 60 different solid patterns;

[0062] Step 2), with embodiment 1.

[0063] Step 3), heating the substrate to obtain a perovskite fluorescent anti-counterfeiting label: heating the patterned precursor droplet array substrate obtained in step 2) at 60°C.

[0064] Experimental results: if Figure 4 As shown, it can be seen that each pattern has a unique topographical texture.

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Abstract

The invention relates to a manufacturing method and application of a non-reproducible perovskite fluorescent anti-counterfeiting label; the manufacturing method comprises the following steps: preparing a substrate with a patterned lyophilic and lyophobic array, preparing a precursor droplet array substrate, and heating the substrate to obtain the perovskite fluorescent anti-counterfeiting label. According to the invention, different patterns are obtained by combining the solid patterns and the hollow patterns, and unique pattern morphology textures are obtained by adjusting the temperature. According to the invention, the solid pattern and the hollow pattern can be set, and the solid pattern and the hollow pattern can also be combined, so that anti-counterfeiting patterns set by different shape classification symbols are obtained, and the potential of the anti-counterfeiting label in commercial anti-counterfeiting application is improved. By using the method disclosed by the invention, the crystal films with highly similar shapes can be prepared, but each crystal film has irreproducible textures, and the reflection of the textures in a fluorescence image is unique light and shade distribution. The anti-counterfeit label is low in cost, the verification process is simple and efficient, and the anti-counterfeit label has a good market prospect.

Description

technical field [0001] The invention belongs to the technical field of product detection and traceability and anti-counterfeiting labels, and specifically relates to a method for making and application of a non-replicable perovskite fluorescent anti-counterfeiting label. Background technique [0002] Under the background of the great development of socialized production, commodity anti-counterfeiting is a major technical problem, and anti-counterfeiting labels are generally used. An important feature of anti-counterfeit labels is the need to be non-reproducible. Since the non-reproducible technology was proposed in 2002, many anti-counterfeit labels with non-reproducible features have been researched, such as unique bionic fingerprint patterns with random surface topography; and randomly distributed Nanoparticle patterns, including petal-like patterns with random pinning points, randomly positioned nanowires coated with fluorescent dyes, etc. In addition, researchers have p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09F3/02G09F13/20
CPCG09F3/02G09F3/0297G09F13/20
Inventor 巫金波林宇宏温维佳冯静芸张萌颖薛厂
Owner SHANGHAI UNIV
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