Ba3LaNa(PO4)3F:Tm^3+,Dy^3+:A tunable blue-white color emitting phosphor via energy transfer for UV white LEDs  

作　　者：Dingdian Xu Wei Zhou Shujing Li Dongsheng Bai 

机构地区：[1]Beijing Advanced Innovation Center for Food Nutrition and Human Health,Beijing Technology and Business University,Beijing 100048,China [2]Department of Chemistry,School of Science,Beijing Technology and Business University,Beijing 100048,China

出　　处：《Chinese Chemical Letters》2020年第2期575-578,共4页中国化学快报（英文版）

摘　　要：A series of Tm^3+/Dy^3+co-doped Ba3 LaNa(PO4)3 F(BLNPF) phosphors were synthesized successfully via a high-temperature solid-reaction,and luminescence properties were investigated.Upon near violet excitation,BLNPF:Tm^3+,Dy^3+ phosphors exhibit Tm^3+:^1D2-^3 F4 and Dy^3+:^4 F(9/2)-^6 HJ(J=15/2,13/2,11/2)transitions with diffe rent luminescence intensity.The emitting color of the obtained products was found to shift from blue to white as a result of efficient energy transfer(ET) from Tm^3+to Dy^3+ions.According to photoluminescence emission intensity,the positive effect of activator on ET efficiency was calculated and the maximum ET efficiency was found around 72.6% with Dy^3+ concentration was 0.04.By means of Dexter's theoretical model,furthermore,dipole-dipole interaction was confirmed as the mechanism of energy transfer from Tm^3+ to Dy^3+ ions.The results suggested that BLNPF:Tm^3+,Dy^3+ phosphor might be a promising single-phased white-light-emitting phosphor for UV white-light LED.A series of Tm3+/Dy3+co-doped Ba3 LaNa（PO4）3 F（BLNPF） phosphors were synthesized successfully via a high-temperature solid-reaction,and luminescence properties were investigated.Upon near violet excitation,BLNPF:Tm3+,Dy3+ phosphors exhibit Tm3+:1D2-3 F4 and Dy3+:4 F9/2-6 HJ（J=15/2,13/2,11/2）transitions with diffe rent luminescence intensity.The emitting color of the obtained products was found to shift from blue to white as a result of efficient energy transfer（ET） from Tm3+to Dy3+ions.According to photoluminescence emission intensity,the positive effect of activator on ET efficiency was calculated and the maximum ET efficiency was found around 72.6% with Dy3+concentration was 0.04.By means of Dexter’s theoretical model,furthermore,dipole-dipole interaction was confirmed as the mechanism of energy transfer from Tm3+to Dy3+ions.The results suggested that BLNPF:Tm3+,Dy3+phosphor might be a promising single-phased white-light-emitting phosphor for UV white-light LED.

关 键 词：PHOSPHORS Ba3LaNa(PO4)3F Luminescence Energy transfer White light 

分 类 号：TN312.8[电子电信—物理电子学] TQ422[化学工程]