Fluorescent,multifunctional anti-counterfeiting,fast response electrophoretic display based on TiO_(2)/CsPbBr_(3)composite particles  

作　　者：Guangyou Liu Xinzao Wu Feng Xiong Jinglan Yang Yunhe Liu Jie Liu Zhuohang Li Zong Qin Shaozhi Deng Bo-Ru Yang 

机构地区：[1]State 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

出　　处：《Light(Science & Applications)》2024年第10期2168-2178,共11页光（科学与应用)（英文版）

基　　金：supported by National Key Research and Development Program of China(2022YFB3602803);the MOST(2022YFA1203003);the Key-Area Research and Development Program of Guangdong Province(2019B010934001);Scientific and Technological Projection of Guangdong province No:2020B1212060030.

摘　　要：Traditional optical anti-counterfeiting(AC)is achieved by static printed images,which makes them susceptible to lower levels of security and easier replication.Therefore,it is essential to develop AC device with dynamic modulation for higher security.Electrophoretic display(EPD)has the advantages of low power consumption,high ambient contrast ratio,and capability of showing dynamic images which is suitable for dynamic AC applications.Herein,we prepared a dynamical AC device based on a fluorescent EPD,and achieving the image switch between black,white,and green fluorescence states under the dual-mode driving(electronic field and Uv light).We loaded perovskite quantum dots(CsPbBr_(3))onto the TiO_(2) particles and further prepared fluorescent electrophoretic particles TiO_(2)/CsPbBr_(3)-3-PLMA(TiO/CPB-3)by grafting and polymerizing method.In addition,We fabricated the AC devices based on the fluorescent EPD,which exhibits the multifunctional AC,where the fluorescent EPD has a fast response time of 350 ms,a high contrast ratio of 17,and bright green fluorescence.This prototype demonstrates a new way for future dynamic AC and identification.

关 键 词：dynamic COMPOSITE AMBIENT 

分 类 号：TN873[电子电信—信息与通信工程]