Reversible blue-green emitting CsPbBr3 perovskite quantum dots glasses for anti-counterfeiting
Hanqiao Liu1, Han Xiao1, Yuehua Chen1
1College of Physics and Energy, Fujian Normal University, Fuzhou 350117, China.
Journal of Colloid and Interface Science
|May 15, 2026
Summary
Researchers developed a novel anti-counterfeiting material using perovskite quantum dots in glass. This material offers tunable, reversible color emission, enabling secure applications like product traceability and data storage.
Area of Science:
- Materials Science
- Nanotechnology
- Optics
Background:
- Traditional anti-counterfeiting methods face limitations due to advanced replication technologies.
- There is a growing need for unclonable and dynamic security solutions.
- Perovskite quantum dots (PeQDs) offer tunable optical properties and stimulus responsiveness.
Purpose of the Study:
- To develop a highly stable nanocomposite for advanced anti-counterfeiting applications.
- To investigate the synergistic effects of ZnO and La2O3 on glass network properties.
- To demonstrate reversible color emission and laser-induced dynamic responses.
Main Methods:
- Synergistic regulation of glass network using ZnO and La2O3 additives.
- Preparation of CsPbBr3@glass nanocomposite with controlled blue-green emission.
- Utilizing femtosecond laser (fs) microfabrication for writing-erasing-recovery operations.
Main Results:
- Achieved precise control over blue-green emission wavelengths.
- Demonstrated high sensitivity to annealing temperature and cooling rate for reversible emission.
- Successfully performed multi-cycle writing-erasing-recovery operations using fs laser.
Conclusions:
- The CsPbBr3@glass nanocomposite provides a robust platform for dynamic anti-counterfeiting.
- The material exhibits potential for high-end product traceability and security document protection.
- The tunable and reversible optical properties open avenues for optical information storage.
