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Fluorescent, multifunctional anti-counterfeiting, fast response electrophoretic display based on TiO2/CsPbBr3
Guangyou Liu1, Xinzao Wu1, Feng Xiong1
1State Key Laboratory of Opto-electronic Materials and Technology, Guangdong Province Key Laboratory of Display Materials and Technologies, School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou, 510006, China.
This study introduces a novel dynamic anti-counterfeiting (AC) device using fluorescent electrophoretic displays (EPDs). The device switches between black, white, and green fluorescence states, offering enhanced security against replication.
Area of Science:
- Materials Science
- Optoelectronics
- Security Technology
Background:
- Traditional optical anti-counterfeiting (AC) methods rely on static images, posing significant security risks due to ease of replication.
- Dynamic modulation is crucial for developing advanced AC solutions with higher security.
- Electrophoretic displays (EPDs) offer low power consumption, high contrast, and dynamic imaging capabilities, making them suitable for AC applications.
Purpose of the Study:
- To develop a novel dynamic anti-counterfeiting (AC) device with enhanced security features.
- To leverage fluorescent electrophoretic displays (EPDs) for multi-state image switching and authentication.
- To integrate perovskite quantum dots into EPDs for advanced anti-counterfeiting functionalities.
Main Methods:
- Preparation of fluorescent electrophoretic particles by loading perovskite quantum dots (CsPbBr3) onto TiO2 nanoparticles.
- Grafting and polymerization of TiO2/CsPbBr3 onto PLMA to create TiO2/CsPbBr3-3-PLMA (TiO/CPB-3) fluorescent particles.
- Fabrication of AC devices utilizing the developed fluorescent EPD for dual-mode driving (electronic field and UV light).
Main Results:
- The developed fluorescent EPD exhibits dynamic image switching between black, white, and bright green fluorescence states.
- The device demonstrates a fast response time of 350 ms and a high contrast ratio of 17.
- The prototype showcases multifunctional AC capabilities, integrating fluorescence and dynamic display properties.
Conclusions:
- The fluorescent EPD-based AC device offers a promising solution for advanced, dynamic anti-counterfeiting applications.
- The integration of perovskite quantum dots enhances the security and functionality of electrophoretic displays for authentication.
- This work presents a new paradigm for future dynamic AC technologies and identification systems.
