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Patterning via Optical Saturable Transitions - Fabrication and Characterization
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Pressure encryption toward physically uncopiable anti-counterfeiting.

Dianlong Zhao1,2, Shunxin Li1, Yang Su3

  • 1State Key Laboratory of High Pressure and Superhard Materials, College of Physics, Jilin University, Changchun, 130012, China.

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|July 5, 2025
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This summary is machine-generated.

This study introduces pressure-induced luminescence for advanced anti-counterfeiting. Applying pressure to a hybrid halide material creates multiple distinct emission colors, enhancing security beyond traditional optical methods.

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Area of Science:

  • Materials Science
  • Optoelectronics
  • Chemical Engineering

Background:

  • Current optical anti-counterfeiting relies on photoexcitation, posing risks if materials are replicated.
  • Existing methods lack robust encryption, making them vulnerable to counterfeiting.

Purpose of the Study:

  • To develop a novel pressure-based encryption strategy for optical anti-counterfeiting.
  • To enhance security by utilizing pressure-induced emission from luminogens.

Main Methods:

  • Utilized 0D hybrid halide (C7H11N2, 4DMAP)2ZnBr4 as a pressure-induced emission luminogen.
  • Applied varying pressures to induce distinct emission color changes.
  • Investigated the underlying mechanisms of pressure-induced luminescence tuning.

Main Results:

  • The material exhibited at least 8 distinct emission colors under different pressure levels.
  • Color changes were attributed to controllable tuning of charge transfer and local excitation.
  • Demonstrated a triple-level, physically uncopiable optical anti-counterfeiting technique.

Conclusions:

  • Pressure encryption offers a robust strategy to strengthen optical anti-counterfeiting.
  • Materials-by-design approach enables high-performance anti-counterfeiting, imaging, and information storage.