Fluorescent composite material as well as preparation method and application thereof

Abstract

The invention discloses a fluorescent composite material as well as a preparation method and application thereof. A FAPbX3 perovskite quantum dot precursor solution and a polymer base material are mixed to obtain a glue solution, a solvent in the glue solution is removed, so that FAPbX3 perovskite quantum dots grow in situ in the polymer base material, the fluorescent composite material is obtained, the FAPbX3 perovskite quantum dot precursor solution comprises a polar solvent I and a polar solvent II, and the polar solvent I and the polar solvent II are used for in-situ growth of the FAPbX3 perovskite quantum dots. The polar solvent II comprises at least one of methanol or ethanol, and X is halogen. The fluorescent composite material prepared in the invention is environment-friendly, has direct fluorescent anti-counterfeiting performance, also has the characteristics of high-temperature fluorescence weakening or quenching and FAX ethanol solution supplementing fluorescence recovery, has multiple fluorescent responses, greatly improves the anti-counterfeiting concealment, and has good anti-counterfeiting concealment.

Description

technical field [0001] The invention belongs to the technical field of fluorescent materials, and particularly relates to a fluorescent composite material and a preparation method and application thereof. Background technique [0002] Counterfeit and shoddy products are emerging in the global market one after another, which has greatly troubled enterprises and consumers, and has caused inestimable losses all year round. It seems to have become a serious global problem. To this end, governments or enterprises in various countries have spent huge sums of money to develop various anti-counterfeiting materials and technologies that are highly recognizable and difficult to replicate to deal with the emerging counterfeiting methods. Among them, fluorescent anti-counterfeiting technology has the characteristics of high efficiency light emission, low cost, difficult replication, and large-scale preparation. As one of the simpler methods, it has been widely concerned and researched a...

AI Technical Summary

Problems solved by technology

However, if perovskite quantum dots are directly used for fluorescent anti-counterfeiting without encapsulation, perovskite quantum dots are directly exposed to the outside, so they are easily digested under conditions such as water, light, and oxygen, and cause Pb toxicity, thereby causing environmental pollution.

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