Tb3+→Sm3+能量传递调控的多色应力发光材料及其动态防伪应用OA

Mechanoluminescent(ML)materials,by virtue of their unique capability for mechanical-to-optical en-ergy conversion,hold great promise for a wide range of applications,and the development of multicolor properties can further broaden their application scope.Energy transfer is a core mechanism for tuning the properties of lumines-cent materials.However,ML materials that utilize energy transfer to adjust chromaticity are extremely rare.In this study,a series of Na2CaP2O7:Tb3+,Sm3+phosphors are prepared via a high-temperature solid-state method.An ener-gy transfer channel from Tb3+to Sm3+is successfully established,enabling the tuning of ML colors.Based on this,we design an application for dynamic information encryption and anti-counterfeiting by utilizing the variations in ML col-or and intensity to record the trajectory and magnitude of the applied mechanical force.This research not only pro-vides an effective strategy for designing novel multicolor ML materials but also broadens their application scenarios in the field of advanced information security.