Tunable luminescence,energy transfer and excellent thermal stability of SrMg2(PO4)2:Ce^3+,Tb^3+ phosphors for LEDs  

作　　者：Wanxin Mi Jun Zheng Peng Qiao Lili Cao Siqi Chu Hongping Ma 

机构地区：[1]College of Machinery and Energy Engineering,Zhejiang University of Science and Technology,Hangzhou 310013,China [2]Zhejiang Academy of Special Equipment Science,Hangzhou 314415,China

出　　处：《Journal of Rare Earths》2021年第1期19-25,I0001,共8页稀土学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(61875176)。

摘　　要：A series of novel SrMg2(PO4)2:Ce^3+,Tb^3+(SMP:Ce^3+,Tb^3+)phosphors with tunable emission spectra were produced via high temperature solid phase method.XRD,fluorescence spectrum and fluorescence lifetime for SMP:Ce^3+,Tb^3+were studied in detail.Under the excitation at 308 nm,SMP:Ce^3+,Tb^3+samples can emit high efficiency tunable blue-green light by controlling the proportion of dopant concentration.Through the spectral overlap and the regular change of fluorescence lifetime,it is proved that there is a significant energy transfer between Ce^3+and Tb^3+in SMP matrix and the energy transfer mechanism is determined to be an electric dipole-dipole interaction with energy transmission efficiency of 55%.In additional,Commission International de L’Eclairage(CIE)color coordinates and thermal stability were studied.All above findings suggest that SMP:Ce^3+,Tb^3+can be regarded as the potential bluish green phosphor for LED applications.

关 键 词：Phosphate Luminous performance Energy transfer Thermal stability Rare earths 

分 类 号：TQ422[化学工程]