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Updated: Jan 19, 2026

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Advanced Dynamic Photoluminescent Material for Dynamic Anticounterfeiting and Encryption.

Jia Wang1, Jun Ma1, Jiachi Zhang1

  • 1National & Local Joint Engineering Laboratory for Optical Conversion Materials and Technology , Lanzhou University , Lanzhou 730000 , P. R. China.

ACS Applied Materials & Interfaces
|September 10, 2019
PubMed
Summary

Researchers developed a novel dynamic photoluminescence (PL) material, Na2CaGe2O6:Tb3+, offering advanced anticounterfeiting solutions. This material

Keywords:
anticounterfeitingcross relaxation effectdynamic photoluminescenceencryptionluminescent imageluminescent material

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Area of Science:

  • Materials Science
  • Photochemistry
  • Solid-State Chemistry

Background:

  • Anticounterfeiting is crucial, but current static photoluminescence (PL) methods are vulnerable to duplication.
  • Existing luminescent anticounterfeiting technologies lack dynamic features, making them susceptible to sophisticated counterfeiting.

Purpose of the Study:

  • To introduce a novel dynamic photoluminescence (PL) material for advanced anticounterfeiting applications.
  • To demonstrate the feasibility of creating high-level dynamic luminescent anticounterfeiting and encryption devices.

Main Methods:

  • Synthesis and characterization of Na2CaGe2O6:Tb3+ as a dynamic PL material.
  • Investigation of the dynamic PL mechanism involving traps and Tb3+ cross-relaxation.
  • Fabrication and testing of anticounterfeiting devices using the dynamic PL material.

Main Results:

  • Na2CaGe2O6:Tb3+ exhibits dynamic PL, changing color from red to yellow to green under UV irradiation.
  • The dynamic PL is attributed to specific trap sites and the cross-relaxation effect of Tb3+ ions.
  • Developed anticounterfeiting devices demonstrated high security, proving resistant to current counterfeiting methods and effective in simulated scenarios.

Conclusions:

  • The novel dynamic PL material offers a robust solution against counterfeiting, surpassing static PL techniques.
  • The dynamic luminescent properties provide a unique security feature that is difficult to replicate.
  • This material has the potential to inspire innovative designs for secure encryption and anticounterfeiting technologies.