Sr1-x-yMgP2O7:xCe3+,yTb3+ phosphors were successfully synthesized by a solid-state reaction method. The crystal structure, optical properties, luminescence decay, energy transfer, and thermal stability properties were investigated. The results showed that the emission peaks of the co-doped Ce3+ and Tb3+ ions in the SrMgP2O7 host were located at 398 and 545 nm, respectively. The peaks were attributed to 5d-4f and 5D4→F5transitions, respectively. An efficient energy transfer from the Ce3+ to Tb3+ ions by means of dipole-dipole interactions was observed and the critical distance of the energy transfer was 0.614 nm. The thermal activation energies of 0.122 and 0.111 eV for SrMgP2Or:Ce3+ and SrMgP2Cv:Tb3+, respectively, were obtained from the temperature dependent (313-453 K) luminescence intensities. The Tb3+ ion was found to be superior to Ce3+ ion in the thermal stability of light-emitting diodes.%采用高温固相法合成了Sr1-x-MgP2O7∶xCe3+,yTb3+荧光粉.研究了荧光粉的晶体结构、发光特性、荧光寿命、能量传递机理和荧光粉的热稳定性.研究结果表明:在SrMgP2O7基质中,Ce3+的发射峰值为398 nm,Tb3+的主发射峰值为545 nm,它们分别属于5d-4f跃迁和5D4→7F5跃迁.Ce3+和Tb3+共掺时,Ce3+和Tb3+通过电偶极子-电偶极子相互作用发生能量传递,能量传递的临界距离为0.614 nm.通过计算得到单掺杂Ce3+、Tb3+时热猝灭过程的激活能分别为0.122和0.111 eV,Tb3+离子的发光热稳定性比Ce3+离子的好.
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