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Co-doped perovskite nanocrystals for multiplexed anticounterfeiting applications.

Manoj Sharma1, Chang Cao1, Gaveshana A Sepalage1

  • 1Department of Materials Science and Engineering, Monash University, Clayton, Victoria 3800, Australia. manojsharma@monash.edu.

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|March 26, 2025
PubMed
Summary
This summary is machine-generated.

This study introduces advanced security features using manganese-doped and ytterbium-manganese co-doped perovskite nanocrystals (NCs). These NCs offer dual visible and near-infrared emissions for robust, multi-layered encryption and data security applications.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Optoelectronics

Background:

  • Colloidal perovskite nanocrystals (NCs) doped with transition and lanthanide metals exhibit efficient visible to near-infrared (NIR) emission.
  • These luminescent properties are promising for advanced security applications requiring multi-modal authentication.

Purpose of the Study:

  • To explore the use of Mn-doped and Yb-Mn co-doped perovskite NCs for photoluminescence-based security features.
  • To investigate the integration of overt (visible) and covert (NIR) emission pathways for enhanced encryption.
  • To assess the stability and dynamic functionalities (write/erase) of these engineered security features.

Main Methods:

  • Synthesis of Mn-doped and Yb-Mn co-doped perovskite nanocrystals.
  • Fabrication of printed security patterns utilizing these NCs.
  • Evaluation of photoluminescence properties (visible and NIR emission).
  • Assessment of material stability under ambient, moisture, and thermal stress.
  • Chemical engineering via anion exchange reactions to tune host-dopant energy transfer.

Main Results:

  • Demonstrated efficient visible emission from Mn-dopants for overt security.
  • Achieved NIR emission from Yb-dopants for covert information concealment.
  • Confirmed stability of engineered printed patterns under various environmental conditions.
  • Successfully implemented write and erase functionalities through anion exchange-mediated energy transfer tuning.

Conclusions:

  • Mn- and Yb-Mn co-doped perovskite NCs provide a versatile platform for advanced photoluminescence-based security features.
  • The combination of visible and NIR emission, coupled with tunable energy transfer, enables complex encryption strategies.
  • Engineered perovskite NC security features exhibit promising stability and dynamic reconfigurability for anti-counterfeiting and data security.