Anti‐Counterfeiting Application of Persistent Luminescence Materials and Its Research Progress

Abstract

Persistent luminescent materials can continue to emit light after stopping excitation, and their stored energy is gradually released during the decay time after persistent emitting, which makes the color and luminance changes in slow decay and plays an important role in protecting information and combating forgery. When combined with other anti‐counterfeiting technologies to form a multi‐modal and multi‐process anti‐counterfeiting design, it perfectly hides the real information and has a broad application prospect in anti‐counterfeiting logo design. A brief overview of the design of three different persistent luminescence‐based anti‐counterfeiting applications in unimodality to achieve information encryption in the time dimension. The energy stored in the trap is studied to be released by different physical stimuli and applied to stimulus‐like responsive persistent luminescent materials, and the design of persistent luminescence anti‐counterfeiting applications based on many different processes in dual‐modality, obtaining the dynamic anti‐counterfeiting effect of multiple processes in multiple modes. This work reviews the research background of persistent luminescent materials in the field of anti‐counterfeiting in recent years, compares the important breakthrough progress of persistent luminescent materials applied to anti‐counterfeiting research, and finally puts forward the current problems, future challenges, and development directions.

Modulating Mn self-reduction and multimodal luminescence in CaSb2O6 through La3+ doping for quadruple-mode dynamic anti-counterfeiting and optical temperature sensing applications

“…Therefore, they are easily imitated and obviously cannot meet the requirements of realistic applications. 6 With the development of luminescence research, many luminescence modes, such as photoluminescence (PL), thermoluminescence (TL), up-conversion luminescence (UCL), persistent luminescence (PersL), mechanoluminescence (ML), and photostimulated luminescence (PSL), have been used to study anti-counterfeiting technology. 7 Also, more complex anti-counterfeiting techniques have been developed by increasing the luminescence modes.…”

Multiband MgGeO3-Based Persistent Luminescent Nanophosphors for Dynamic and Multimodal Anticounterfeiting

“…If the optical material is integrated into the printing ink, an optical barcode can be generated, offering a high level of security. 6,13 In principle, materials exhibiting visible light luminescence under ultraviolet (UV) light excitation are good candidates for optical anticounterfeiting. Carbon dots, quantum dots, and molecule dyes have all been explored for optical anticounterfeiting applications.…”

“…They are invisible under natural light but can be revealed under excitation. , Compared to those traditional techniques, optical anticounterfeiting materials are more difficult to duplicate. If the optical material is integrated into the printing ink, an optical barcode can be generated, offering a high level of security. , …”

Fluorescent Materials Based on Spiropyran for Advanced Anti-Counterfeiting and Information Encryption

“…Among the many anti-counterfeiting technologies, fluorescent anti-counterfeiting technology is well-known and most commonly used to against counterfeiters due to its wide material source, low cost, simple usage, good concealment, and simple response mechanisms [ 6 , 7 , 8 , 9 , 10 , 11 , 12 ]. Although extensive research has been conducted on the preparation of optimal fluorescent anti-counterfeiting materials, significant challenges still exist in achieving high-performance fluorescent materials with advanced anti-counterfeiting patterns [ 8 , 9 , 12 , 13 , 14 , 15 , 16 , 17 , 18 ]. Firstly, it is imperative to further develop a simplified, efficient, environmentally friendly, and controllable method for preparing fluorescent materials.…”