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Surficial Host-Guest Responsive CsPbBr3 Perovskite Nanocrystals for Programmable Multi-Level Information Encryption.

Bo-Yi Deng1,2, Zi-Rong Zhou1,2, Hai-Long Xu2,3

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Small (Weinheim an Der Bergstrasse, Germany)
|February 14, 2024
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Summary

Researchers developed new adamantyl-capped CsPbBr3 perovskite nanocrystals (AD-CsPbBr3) and a supramolecular assembly (mCD@AD-CsPbBr3). These materials enable multi-level photoluminescence encoding for advanced information storage and encryption.

Keywords:
host‐guest chemistryinformation encryptionperovskite nanocrystalphotoluminescencestimuli‐responsive materials

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Photochemistry

Background:

  • The demand for advanced information storage and encryption materials is increasing.
  • Stimuli-responsive photoluminescent materials offer potential for secure data handling.
  • Perovskite nanocrystals (NCs) exhibit unique optical properties suitable for such applications.

Purpose of the Study:

  • To design and synthesize novel adamantyl-capped CsPbBr3 perovskite NCs (AD-CsPbBr3).
  • To create a supramolecular host-guest assembly (mCD@AD-CsPbBr3) for stimuli-responsive applications.
  • To establish a programmable Multi-Level Photoluminescence Encoding System (MPLES) for information storage and encryption.

Main Methods:

  • Synthesis of AD-CsPbBr3 perovskite NCs.
  • Formation of mCD@AD-CsPbBr3 supramolecular assemblies.
  • Dispersion of materials in different solvents (toluene, methanol) to induce photoluminescence (PL) responses.
  • Development and testing of the MPLES for information encoding and encryption.

Main Results:

  • Diverse PL turn-on/off and discoloration responses were observed in different solvent systems.
  • Successful demonstration of multi-level information encoding (four-level and three-level).
  • Achieved layer-by-layer four-level information encryption/decryption and a two-level encrypted 3D code.

Conclusions:

  • The developed mCD@AD-CsPbBr3 system exhibits tunable photoluminescence properties for stimuli-responsive applications.
  • The MPLES provides a robust platform for multi-level information encoding and complex data security.
  • This work presents a promising approach for advanced information storage and encryption using perovskite-based materials.