Ce^(3+),due to its broadband emission,has the potential to serve as a donor ion for energy transfer to achieve the possible efficient tunable multi-emission in materials.However,current related research primarily focu...Ce^(3+),due to its broadband emission,has the potential to serve as a donor ion for energy transfer to achieve the possible efficient tunable multi-emission in materials.However,current related research primarily focuses on photoluminescent(PL)phosphors,while studies on achieving tunable long persistent luminescence(LPL),particularly in glass materials,are insufficient.In this work,Ce-Tb codoped boroaluminate glass was synthesized using a high-temperature melting method under a reducing atmosphere.Under the influence of oxygen vacancy traps induced during the reduction of Ce^(4+)to Ce^(3+),glass samples exhibit an obvious LPL with a broadband center wavelength at 420 nm and a narrowband center wavelength at 547 nm,which correspond well to Ce^(3+)ions'd-f transitions and Tb^(3+)ions'f-f transitions,respectively.A reasonable Ce^(3+)doping amount achieves the optimal trap depth and concentration to enhance LPL intensity and duration.Additionally,it improves the PL intensity of Tb^(3+)by enhancing the energy transfer from Ce^(3+)to Tb^(3+),thereby enabling the glass to exhibit variable LPL colo rs ranging from blue to cyan.Finally,based on the PL and LPL characteristics of the samples,a dynamic encryption anticounterfeiting application is described.展开更多
基金Project supported by the Department of Science and Technology of Zhejiang Province,China(2024C01192)。
文摘Ce^(3+),due to its broadband emission,has the potential to serve as a donor ion for energy transfer to achieve the possible efficient tunable multi-emission in materials.However,current related research primarily focuses on photoluminescent(PL)phosphors,while studies on achieving tunable long persistent luminescence(LPL),particularly in glass materials,are insufficient.In this work,Ce-Tb codoped boroaluminate glass was synthesized using a high-temperature melting method under a reducing atmosphere.Under the influence of oxygen vacancy traps induced during the reduction of Ce^(4+)to Ce^(3+),glass samples exhibit an obvious LPL with a broadband center wavelength at 420 nm and a narrowband center wavelength at 547 nm,which correspond well to Ce^(3+)ions'd-f transitions and Tb^(3+)ions'f-f transitions,respectively.A reasonable Ce^(3+)doping amount achieves the optimal trap depth and concentration to enhance LPL intensity and duration.Additionally,it improves the PL intensity of Tb^(3+)by enhancing the energy transfer from Ce^(3+)to Tb^(3+),thereby enabling the glass to exhibit variable LPL colo rs ranging from blue to cyan.Finally,based on the PL and LPL characteristics of the samples,a dynamic encryption anticounterfeiting application is described.
