Study On Luminescence Properties Of Fluorescent Materials With Centrally Symmetric Structure Doped With Mn²⁺

Mn²⁺-doped luminescent materials refer to inorganic luminescent materials that generate luminescent radiation by introducing transition metal Mn²⁺as an activator.Manganese has an electronic configuration of 3d⁵4s²,can exhibit a variety of valence states,and is easily affected by the crystal field,showing excellent luminescent properties such as optical storage and stimulated emission.Mn²⁺often exhibits different emission bands,and the emission color is tuned from green to the near-infrared region.This type of luminescent material shows broad application prospects in white light,plant lighting and night imaging.In this paper,Ba Zn OS:Mn²⁺and Mg F₂:Mn²⁺phosphors were synthesized based on high-temperature solid-state method.Through the introduction of dopant ions such as Bi³⁺,Er³⁺,Eu²⁺and Yb²⁺,the factors affecting the luminescence properties of Mn²⁺were explored,and various luminescence modes of Mn²⁺were realized,which expanded the potential application of Mn²⁺doped luminescent materials in more emerging fields.The main research content of this paper is as follows:（1）Ba Zn OS:Mn²⁺luminescent material with piezoelectric properties was prepared,and its photoluminescence,photostimulated luminescence（PSL）,X-ray luminescence（RL）and stress luminescence（ML）properties were studied.The introduction of Bi³⁺and Er³⁺can enrich the luminescence color and luminescence mode,which is manifested in the change of photoluminescence color under different excitation bands and the change of stress luminescence color under different doping concentrations.In addition,the introduction of Er3+endows the material with the adjustment of photoexcited luminescence and upconversion luminescence intensity.It shows the dual-dimensional multi-imitation ability in the time-space dimension.This design method provides a new idea for the subsequent design of more diverse anti-counterfeiting materials.（2）A double luminescent center(Eu²⁺/Yb²⁺)and Mn²⁺is introduced into the Mg F₂matrix.Based on this,the control of the stress-luminescent color is realized.Through spectral analysis,the response difference of different luminescent centers to stress is studied,and the reasons for the spectral changes are analyzed.In addition,by designing different bridge structures with phosphor powder and photocurable resin by 3D printing,it is confirmed that the developed material can realize stress visualization,which provides an effective way for model building and structural mechanics analysis.