Application Progress of Up conversion Luminescent Materials in Fluorescent Anti-counterfeiting Technology

Rare-earth-doped up conversion luminescent materials possess advantages such as high luminescent efficiency, excellent spectral characteristics, ability to emit multiple colors, strong interference resistance, and accurate information response. These advantages make them suitable for various anti-counterfeiting needs, thus making them a key focus of research in the field of fluorescent anti-counterfeiting. This article provides a systematic review and summary of the luminescent principles, preparation conditions, substrate effects, applications in fluorescent anti-counterfeiting, and existing issues of upconversion luminescent materials. Finally, potential research and development directions for the future application of up conversion luminescent materials in the field of fluorescent anti-counterfeiting are proposed.