Luminescent materials play a key role in the field of optical anti-counterfeiting.However,the development of multimode,multi-color dynamic phosphors,making optical anti-counterfeiting more advanced and practical,remai...Luminescent materials play a key role in the field of optical anti-counterfeiting.However,the development of multimode,multi-color dynamic phosphors,making optical anti-counterfeiting more advanced and practical,remains a great challenge.Herein,multimode luminescence(PL,PersL,TL,PSL,and PSPL),dynamic multi-color emission phosphors based on a single CaSb_(2)O_(6)(CSO)host doped with manganese ions were developed and studied in detail for the first time.The partial self-reduction of Mn in the CSO crystal was observed.The self-reduction behavior of Mn could be effectively suppressed by co-doping with La^(3+)ions through unequal substitution of the Ca^(2+)ions.Furthermore,it was found that the multimode and dynamic luminescence properties of the CSO:Mn phosphors could be further modulated by adjusting the La^(3+)doping concentration,which could be used as a new type of anti-counterfeiting materials.Here,a novel four-mode multicolor and dynamic anti-counterfeiting“rose bouquet”pattern was designed,where a portable UV lamp only having two emitting wavelengths(254 and 365 nm)was required to achieve a full anti-counterfeiting effect.This design is low-cost,easy to realize and advanced in terms of functionality,which has great potential for practical applications in the field of optical anticounterfeiting.In addition,its temperature sensor application based on the different thermal-quenching characteristics of Mn2+and Mn4+was also evaluated.展开更多
文摘Luminescent materials play a key role in the field of optical anti-counterfeiting.However,the development of multimode,multi-color dynamic phosphors,making optical anti-counterfeiting more advanced and practical,remains a great challenge.Herein,multimode luminescence(PL,PersL,TL,PSL,and PSPL),dynamic multi-color emission phosphors based on a single CaSb_(2)O_(6)(CSO)host doped with manganese ions were developed and studied in detail for the first time.The partial self-reduction of Mn in the CSO crystal was observed.The self-reduction behavior of Mn could be effectively suppressed by co-doping with La^(3+)ions through unequal substitution of the Ca^(2+)ions.Furthermore,it was found that the multimode and dynamic luminescence properties of the CSO:Mn phosphors could be further modulated by adjusting the La^(3+)doping concentration,which could be used as a new type of anti-counterfeiting materials.Here,a novel four-mode multicolor and dynamic anti-counterfeiting“rose bouquet”pattern was designed,where a portable UV lamp only having two emitting wavelengths(254 and 365 nm)was required to achieve a full anti-counterfeiting effect.This design is low-cost,easy to realize and advanced in terms of functionality,which has great potential for practical applications in the field of optical anticounterfeiting.In addition,its temperature sensor application based on the different thermal-quenching characteristics of Mn2+and Mn4+was also evaluated.
