Fluorescent anti-counterfeiting material based on copper-based halogen perovskite as well as preparation method and application of fluorescent anti-counterfeiting material

Abstract

The invention provides a fluorescent anti-counterfeiting material based on copper-based halogen perovskite, and relates to the technical field of fluorescent anti-counterfeiting materials. Copper-based halogen perovskite is off-white powder under daily illumination, and has the characteristics of fluorescent property, no toxicity, high luminous efficiency, long service life, good stability and the like. The invention further provides a preparation method and application of the anti-counterfeiting material based on the copper-based halogen perovskite, CuX and MX are mixed, and the mixture is moved to a grinding tank; and then the sealed grinding tank is installed on a ball mill, and ball milling is carried out for 0.5-2.5 hours to obtain a product; under the irradiation of an ultraviolet lamp, the material which is grey white powder emits blue light with shorter wavelength, a proper amount of polar solvent is added into the material, the emitted light can be converted from blue light to yellow light, and the yellow light can be converted into blue light after the polar solvent is completely evaporated. The material has the fluorescence characteristic for a long time, the dual-property anti-counterfeiting function is successfully achieved, and the preparation method has the advantages of being simple in process, low in synthesis cost, high in production efficiency, energy-saving, environmentally friendly and the like.

Description

technical field [0001] The invention relates to the technical field of fluorescent anti-counterfeiting materials, in particular to a fluorescent anti-counterfeiting material based on copper-based halogen perovskite and its preparation method and application. Background technique [0002] Metal halide perovskite materials have attracted extensive attention in the past few decades due to their high absorption coefficient, large carrier diffusion length, and superior optoelectronic properties, making them attractive candidates for solar cells, light-emitting diodes, and photodiodes. Promising materials for optoelectronic applications such as , photodetectors and lasers. [0003] Unfortunately, toxicity and poor stability are the main obstacles limiting its commercialization. Due to the rich performance of perovskite, the present invention uses copper-based halogen perovskite to manufacture an amphoteric anti-counterfeiting material, which is used in fluorescent anti-counterfei...

AI Technical Summary

Problems solved by technology

[0004] At present, there is no report on the use of perovskite as an amphoteric anti-counterfeiting material. In this invention, we will use the method of ball milling for the first time to manufacture copper-based halogen perovskite for anti-counterfeiting technology.

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