Abstract
Regulating luminescent dynamics of lan-thanide-based luminescent materials via external stimuli is of great significance in the fields of optical thermometry and high-level anti-counterfeiting.However,it is still a huge challenge to realize multimodal emissions with tun-able color outputs from a single activator in simple struc-tures via smart dynamic control of photon transition processes.Herein,we present a mechanistic strategy to achieve multimodal luminescence of Er3+activators with color-switchable outputs in a non-core-shell host.Under the control of excitation dynamics(λex=980,808,1532,377 nm),the population among the intermediate energy levels of Er3+and the interaction between Er3+ and Yb3+could be precisely modulated through energy transfer and migration processes,leading to the generation of color-tunable multimodal luminescence upon diverse excitation modes(non-steady-state,single-/dual-wavelength steady,thermal activation).Inspired by its special luminescent performance,the as-obtained material exhibits great potential in noncontact thermometry,multimodal anti-counterfeiting,and high-capacity information encryption by performing a series of proof-of-concept experiments.Our findings might provide a conceptual model to modu-late the luminescent dynamics in a simple-structured sys-tem for the generation of color-adjustable multimodal emissions,which is convenient for the development of advanced luminescent materials toward versatile cutting-edge applications.
基金项目
Natural Science Foundation of Jiangsu Province(BK20211280)
National Natural Science Foundation of China(51702074)
Science Fund for Distinguished Young Scholars()
Nanjing Forestry University()
Advanced Analysis & Testing Center of Nanjing Forestry University for material characterizations()
NETL
NSTL
万方数据