Tunable luminescence, energy transfer and excellent thermal stability of SrMg2(PO4)2∶Ce3+,Tb3+ phosphors for LEDs

• 作者: Wanxin Mi Jun Zheng Peng Qiao Lili Cao Siqi Chu Hongping Ma
• 来源期刊: 稀土学报（英文版）
• 年，卷（期）: 2021,（1）
• 所属期刊栏目: SPECTROSCOPY,LUMINESCENCE AND PHOSPHORS
• 页码范围: 19-25
• 页数: 7页
• 语种: 英文

摘要

A series of novel SrMg2(PO4)2∶Ce3+,Tb3+(SMP∶Ce3+,Tb3+) phosphors with tunable emission spectra were produced via high temperature solid phase method.XRD,fluorescence spectrum and fluorescence life-time for SMP:Ce3+,Tb3+ were studied in detail.Under the excitation at 308 nm,SMP:Ce3+,Tb3+ 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 Ce3+ and Tb3+ 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:Ce3+,Tb3+ can be regarded as the potential bluish green phosphor for LED applications.