Patent #: CN109423278B

Inventor: Liang Li, Congyang Zhang

Highlights

• This patent protects MOF-ABX3 fluorescent perovskite nanocrystals, where perovskite nanocrystals are uniformly dispersed inside metal-organic framework crystals.
• The invention directly supports confidential information storage and protection because MOF-recorded information is invisible until converted into fluorescent perovskite nanocrystals.

Summary

This invention uses metal-organic frameworks as both a template and a security medium for perovskite nanocrystal formation. The MOF material can record information that is not visible under ordinary conditions because it lacks visible absorption or fluorescence. When triggered by appropriate halide chemistry, fluorescent perovskite nanocrystals form inside the MOF and reveal the hidden information. The patent stands out because it turns the chemical transformability of perovskites into an information-security function. It expands Professor Li’s nanocrystal platform beyond displays and stability into smart materials for confidential storage, anti-counterfeiting, and controlled optical decryption.

Patent citation: L. Li and C. Zhang, “Fluorescent perovskite nanocrystal, preparation method and application,” China Patent CN109423278B.