Cr³⁺掺杂荧光粉中的竞争占位以及动态防伪的可调陷阱分布（英文）

【作者】 张梦雅； 索浩； 李盼来； 王志军；

【机构】 河北大学物理科学与技术学院；

【摘要】 Red/NIR long persistent phosphors have received extensive attentions in biomedical,food inspection,iris recognition,biological imaging,etc.Herein,a new phosphor,Li₂ZnGe₃O₈:Cr³⁺,is reported with deep red persistent luminescence peaking at 708 nm.By adjusting the Cr³⁺doping concentration,the competitive site occupation at[ZnO₆]and[GeO₆]polyhedral enables different traps behaviors including trap types,trap concentration and trap depth,which in turn leads to different afterglow duration time from 2 to 20 h.The persistent luminescence mechanisms originated from different trap models have been discussed and it is found that they can cooperate or inhibit each other,enabling different luminescence depending on time.The dynamic anti-counterfeiting applications have been demonstrated,which provides a new way to rationally designing for multi-functional更多还原

【Abstract】 Red/NIR long persistent phosphors have received extensive attentions in biomedical,food inspection,iris recognition,biological imaging,etc.Herein,a new phosphor,Li₂ZnGe₃O₈:Cr³⁺,is reported with deep red persistent luminescence peaking at 708 nm.By adjusting the Cr³⁺doping concentration,the competitive site occupation at[ZnO₆]and[GeO₆]polyhedral enables different traps behaviors including trap types,trap concentration and trap depth,which in turn leads to different afterglow duration time from 2 to 20 h.The persistent luminescence mechanisms originated from different trap models have been discussed and it is found that they can cooperate or inhibit each other,enabling different luminescence depending on time.The dynamic anti-counterfeiting applications have been demonstrated,which provides a new way to rationally designing for multi-functional更多还原