Luminescence properties and energy transfer of Ce3+/Tb3+ co-doped Ca9La(PO4)5(SiO4)F2 phosphor

Abstract Emission-tunable phosphors Ca9La(PO4)5(SiO4)F2:Ce3+,Tb3+ with apatite structure were synthesized by a solid-state reaction. The phase structure, photoluminescence (PL) properties, lifetimes and the PL thermal stability were investigated, respectively. The phosphor exhibited an asymmetric broad-band blue emission (Ce3+) with peak at 403 nm and the line-type green emission with peak at 543 nm (Tb3+). The varied color of the phosphors from blue to green can be achieved by properly tuning the relative ratio of Ce3+/Tb3+ through the energy transfer from Ce3+ to Tb3+ ions. The critical distance was calculated to be 8.78 A by using the concentration quenching method. When the temperature turned up to 150 °C, the emission intensity of Ca9La(PO4)5(SiO4)F2:Ce3+,Tb3+ phosphor was 77% of its initial value at room temperature, which indicated the good thermal stability of the sample. All the properties indicate that the Ca9La(PO4)5(SiO4)F2:Ce3+,Tb3+ phosphor has potential application of color-tunable w-LEDs.

[1]  W. Lu,et al.  Sr3GdNa(PO4)3F:Eu2+,Mn2+: a potential color tunable phosphor for white LEDs , 2014 .

[2]  Q. Yan,et al.  Crystal structure refinement and luminescence properties of Ce3+ singly doped and Ce3+/Mn2+ co-doped KBaY(BO3)2 for n-UV pumped white-light-emitting diodes , 2013 .

[3]  Honglin Yu,et al.  Excitation band extended in CaYAl3O7: Tb3+ phosphor by Ce3+ co-doped for NUV light-emitting diodes , 2014 .

[4]  L. Liao,et al.  Synthesis and energy transfer studies of Eu2+ and Mn2+ co-doped Sr3.45Y6.5O2(PO4)1.5(SiO4)4.5 phosphor , 2013 .

[5]  Andrew G. Glen,et al.  APPL , 2001 .

[6]  L. Liao,et al.  Luminescence Properties and Energy Transfer in La5-x-ySi2BO13:xCe3+, yTb3+ Phosphor , 2013 .

[7]  Ru‐Shi Liu,et al.  Tunable Blue-Green Color Emission and Energy Transfer of Ca2Al3O6F:Ce3+,Tb3+ Phosphors for Near-UV White LEDs , 2012 .

[8]  Jun Lin,et al.  Color Tuning Luminescence of Ce3+/Mn2+/Tb3+-Triactivated Mg2Y8(SiO4)6O2 via Energy Transfer: Potential Single-Phase White-Light-Emitting Phosphors , 2011 .

[9]  Chongfeng Guo,et al.  Double emitting phosphor NaSr4(BO3)3:Ce3+, Tb3+ for near-UV light-emitting diodes , 2011 .

[10]  Q. Su,et al.  The energy transfer from Eu2+ to Tb3+ in calcium chlorapatite phosphor and its potential application in LEDs , 2008 .

[11]  G. G. Stokes.  "J." , 1890, The New Yale Book of Quotations.

[12]  Dong Youl Lee,et al.  High brightness LaPO4:Ce,Tb phosphor particles with spherical shape , 2002 .

[13]  J. Yu,et al.  Hydrothermal synthesis, structures and luminescent properties of nanocrystaline Ca8Gd2(PO4)6O2:Eu2+, Eu3+ phosphors , 2014 .

[14]  Q. Su,et al.  Two-color emitting of Ce3+ and Tb3+ co-doped CaLaGa3S6O for UV LEDs. , 2010, Optics letters.

[15]  Zach DeVito,et al.  Opt , 2017 .

[16]  L. Liao,et al.  Photoluminescence properties and energy transfer of Ba2Lu(BO3)2Cl : Eu2+/Eu3+,Tb3+ phosphors , 2012 .

[17]  Yuhua Wang,et al.  Design, synthesis and characterization of a new apatite phosphor Sr 4 La 2 Ca 4 (PO 4 ) 6 O 2 :Ce 3+ with long wavelength Ce 3+ emission , 2013 .