A terbium activated multicolour photoluminescent phosphor for luminescent anticounterfeiting
来源期刊：Journal of Rare Earths2020年第10期
论文作者：Jun Ma Yumiao Li Weishan Hu Wenxiang Wang Jiachi Zhang Jianhong Yang Yuhua Wang
文章页码：1039 - 1043
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.
Jun Ma，Yumiao Li，Weishan Hu，Wenxiang Wang，Jiachi Zhang，Jianhong Yang，Yuhua Wang
National & Local Joint Engineering Laboratory for Optical Conversion Materials and Technology,Lanzhou University
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.
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