A terbium activated multicolour photoluminescent phosphor for luminescent anticounterfeiting  

作　　者：Jun Ma Yumiao Li Weishan Hu Wenxiang Wang Jiachi Zhang Jianhong Yang Yuhua Wang 

机构地区：[1]National&Local Joint Engineering Laboratory for Optical Conversion Materials and Technology,Lanzhou University,Lanzhou 730000,China

出　　处：《Journal of Rare Earths》2020年第10期1039-1043,I0001,共6页稀土学报（英文版）

基　　金：Project supported by the National Innovation and Entrepreneurship Training Program for Undergraduate (201910730104);The Science and Technology Projects of Gansu Province (18JR3RA270)。

摘　　要：The multicolor photoluminescence(PL) of a Tb3+singly activated NaYGeO4 phosphor is prepared by solid state method.For the first time,it is reported that the PL color of Tb3+in NaYGeO4 phosphor can be tuned from green to blue and,finally,to red by controlling the Tb3+content.The optimal tricolor phosphors are NaYGeO4:0.01 mol% Tb3+(red),NaYGeO4:0.5 mol% Tb3+(blue) and NaYGeO4:5 mol% Tb3+(green),respectively.The PL properties of the NaYGeO4:Tb3+ phosphor were studied in details.The results reveal that the PL color modulations of the NaYGeO4:Tb3+phosphor are essentially due to the cross-relaxation effect of Tb3+,and a possible mechanism on the cross-relaxation is proposed.According to these unique features,a multicolor PL image was fabricated based on the NaYGeO4:Tb3+ phosphor for potential applications in luminescent anticounterfeiting.

关 键 词：Multicolour LUMINESCENCE PHOSPHOR Rare earths 

分 类 号：TQ422[化学工程]