Quadra-Mode Luminescent Phosphors for Force/Thermo-Encoded Information Storage and Anticounterfeiting Applications

作者：Sarfraz Ahmad, Shulong Chang, Danni Peng, Wenjing Liu, Kaiying Zhang, Yuan Deng, Lin Dong · 发表于：ACS Applied Materials & Interfaces · 年份：2025 · DOI：10.1021/acsami.5c04263 · 被引用次数：20 · 研究领域：Luminescence Properties of Advanced Materials、Luminescence and Fluorescent Materials、Radiation Detection and Scintillator Technologies

Multimode luminescent materials possess diverse optical characteristics and play crucial roles in photocommunication and information security. Force-induced mechanoluminescence, as a distinctive excitation mode, exhibits impressive capabilities in the field of anticounterfeiting and information storage. Here, we integrate mechanoluminescence with the conventional luminescence modes (including up-conversion luminescence, down-conversion luminescence, and thermoluminescence (TL)) within LiNbO 3 via well-tuned codoping of Er 3+ and Pr 3+ . LiNbO 3:Pr 3+ /Er 3+ exhibits excitation-dependent photoluminescence (PL), enabling tunable emission colors ranging from green to red, while it shows green up-converted PL emissions owing to the electronic transitions of Er 3+ ions. Both TL and mechanoluminescence emissions are achieved by employing intertrap levels, where mechanical or thermal stimulation releases carriers that transfer energy to Pr 3+ ions, resulting in red emissions. Moreover, an underlying competitive interaction between TL and mechanoluminescence is revealed, which can be leveraged for force/thermo-encored information storage. This unique feature positions LiNbO 3:Pr 3+ /Er 3+ as novel recordable information storage labels to monitor the freshness of perishable goods such as food and medicine. In addition, quadra-mode luminescence material LiNbO 3:Pr 3+ /Er 3+ provides multidimensional codes via emission color and distribution, indicating its significant potential in adva...