Application of rare earth upconversion luminescent material in anti-counterfeiting technologies

Rare earth upconversion luminescent nanomaterials exhibits several unique advantages including large anti-stokes shifts, narrow emission bands, adjustable fluorescence lifetimes, and multi-mode emission, making them ideal for anti-counterfeiting applications. This paper explores the application of these materials in various printing technologies, including inkjet printing, screen printing, nano-imprint lithography, and aerosol spray, for the creation of secure anti-counterfeiting patterns. Rare earth doped upconversion luminescent nanomaterials can be printed into a variety of anti-counterfeiting patterns, which has significant application potential in the fields of optical anti-counterfeiting, information storage and labeling. The upconversion luminescence mechanism is discussed in detail, followed by an analysis of recent advances in the field. The existing anti-counterfeiting printing technology and excitation mode of rare earth upconversion luminescence nanomaterials in the anti-counterfeiting and security field in recent years. Finally, rare earth upconversion luminescent materials have great potential for application in the field of secure anti-counterfeiting, and the unique luminescent mode ensures the uncopyability of anti-counterfeiting products. are addressed, and the prospect and expectation of the future development direction are presented. UCNPs, anti-counterfeiting printing technology, excitation mode together, is expected to contribute to the field of security technology.