The invention discloses a fluorescent anti-counterfeiting-
encryption method for constructing a
perovskite quantum dot array based on in-situ synthesis of a
solid-phase photoetching method. The preparation method comprises the following steps: dissolving cesium perfluoroglutarate, lead oleate and
hexabromocyclododecane in N, N-
dimethylformamide, adding
polymethyl methacrylate, heating and dissolving to obtain a mixed precursor solution,
coating a glass substrate with the mixed precursor solution to obtain a precursor film,
drying to remove N, N-
dimethylformamide, and finally covering the precursor film with a pattern
chromium mask plate to obtain the
chromium-coated glass. And irradiating under a 254 nm
ultraviolet lamp to obtain the CsPbBr3 fluorescent anti-counterfeiting array. According to the method, the
perovskite nanocrystal fluorescent
microarray is prepared in situ based on a photo-induced dehalogenation direct photoetching method, under the action of a
mask plate, halogenated
hydrocarbon is induced to dehalogenate through 254 nm
ultraviolet light to generate
halide ions and drive generation of
perovskite nanocrystals, and perovskite
nanocrystal fluorescent microarrays with different patterns can be obtained by adjusting the patterns of the
mask plate. Developing,
etching and other operations are not needed, and the method is very simple, convenient, efficient and low in cost.