Variable halide perovskites: diversification of anti-counterfeiting applications

Abstract

This review emphasizes how the dimensionality, coordination number and bond length of halide perovskites (HPs) regulate their photoluminescence. HPs have good application potential due to their sensitivity to light, solvent, heat etc., facilitating anti-counterfeiting and encryption/decryption.

Multifaceted luminescence in lanthanide-activated microrods for advanced multicolor anti-counterfeiting

“…Optical anti-counterfeiting, in comparison to conventional techniques like watermarking, barcode, and RFID, offers distinct advantages, including heightened efficiency, streamlined design, and adaptable identification facilitated by versatile excitation modes. 1–5 Recent years have witnessed significant advancements in photoluminescent materials intended for optical anti-counterfeiting, including lanthanide-doped luminescent materials, 6–9 carbon quantum dots, 10,11 perovskite nanocrystals, 12–14 and metal–organic frameworks (MOFs), 15–17 among others. As the contemporary standards for information security continue to escalate, there is an increasing demand for luminescent materials that can operate in multiple modes.…”

Efficient Multi-stimulus-Responsive Luminescent Eu(III)-Modified HOFs Materials: Detecting Thiram and Caffeic Acid and Constructing a Flexible Substrate Anti-counterfeiting Platform

“…Therefore, the luminescence anti-counterfeiting platform has gained widespread attention . Anticounterfeit optical materials include organometallic frameworks, , carbon dots, , quantum dots, , perovskites, , and polymer dots, whose fluorescence can be excited, quenched, or tuned by external stimuli, including heat, light, chemical reagents, and mechanical forces. , Simple luminescent anti-counterfeiting technology, nonetheless, no longer meets the demand for anti-counterfeiting; consequently, new strategies that will show higher security levels are continuously and excessively researched and developed.…”

Inorganic Salt Solution Assisted Grinding Synthesis of Stimuli-Responsive Perovskites for Reversible Information Encryption and Decryption Based on I Ching 64 Hexagrams

“…However, most of these materials face challenges such as complex synthesis, poor environmental stability, a single mode, or having hackable encryption and decryption. 15 As a new type of stimuli-responsive luminescent material, the metal halide perovskites are widely studied because of the toilless chemical-and structural-transformation-induced optical performance variation. 16 Ion exchange and ion migration are efficient ways to modulate the luminescent color of halide perovskites which are beneficial to exploring multimodal, high security information encryption and decryption technology.…”

“…Up to now, a wide range of organic and inorganic smart luminescent materials, including organic dyes, quantum dots, supramolecules, and transition metal complexes, have been developed into stimuli-responsive luminescent materials. However, most of these materials face challenges such as complex synthesis, poor environmental stability, a single mode, or having hackable encryption and decryption …”