科研之友
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摘要
The blue-green-emitting Na2Ca3Si2O8:Tb3+ phosphors were prepared successfully via a traditional high temperature solid-state reaction method. The crystal phase was checked by XRD. The dependence of photoluminescence excitation, photoluminescence and fluorescence decay properties on Tb3+ doping concentration was studied in detail. The emission color can be modified from blue to green based on cross-relaxation through tuning the doping concentration of Tb3+ ions. The cross-relaxation from D-5(3) to D-5(4) state which was investigated by spectroscopic and dynamic measurements was also illustrated with an energy level scheme. It may be a good candidate for blue and green phosphor.
