Archive > Volume 10 Issue 6 > 2014,10(6):447-450. DOI:10.1007/s11801-014-4138-z CSTR:[cstr] Prev Next
Tunable emission, concentration quenching and crystallographic sites of Eu2+ in Sr3Y(PO4)3
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Abstract:
A series of Sr3Y(PO4)3:Eu2+ samples are synthesized by the high temperature solid-state method. Sr3Y(PO4)3:Eu2+ shows an asymmetrical emission band under excitation of 350 nm. The emission peaks at 426 nm and 497 nm are assigned to the nine-coordination Eu2+ and six-coordination Eu2+, respectively. The effects of Eu2+ doping content on the emission intensity and color are observed, and the concentration quenching effect is also observed. For two different Eu2+ luminescence centers, the quenching mechanisms are dipole-dipole interaction and quadrupole-quadrupole interaction, respectively. And the critical distance of energy transfer is calculated by concentration quenching and turns out to be about 3.67 nm. The results above show that the asymmetrical emission band of Sr3Y(PO4)3:Eu2+ comes from two different Eu2+ luminescence centers in the lattice.
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This work has been supported by the National Natural Science Foundation of China (No.50902042), the Natural Science Foundation of Hebei Province of China (Nos.A2014201035 and E2014201037), and the Education Office Research Foundation of Hebei Province of China (Nos.ZD2014036 and QN2014085).
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