Study on the energy transfer efficiency from SrAl2O4:Eu2+, Dy3+ to light conversion agent of red-emitting phosphor: SrAl2O4:Eu2+, Dy3+/light conversion agent

SrAl2O4:Eu2+, Dy3+/light conversion agent is a new luminous material, which can emit red light in the darkness was fabricated by combining light conversion agent on to SrAl2O4:Eu2+, Dy3+ particles. There is energy transfer from SrAl2O4:Eu2+, Dy3+ to light conversion agent, leading to red emitting light. In order to investigate the energy transfer efficiency, several kinds of SrAl2O4:Eu2+, Dy3+/light conversion agent containing different light conversion agent were artificially manufactured, and the energy transfer efficiency from SrAl2O4:Eu2+, Dy3+ to light conversion agent was calculated. The results showed that under near ultraviolet (UV) excitation, SrAl2O4:Eu2+, Dy3+/light conversion agent exhibited the yellow-green emission of the SrAl2O4:Eu2+, Dy3+ and the red emission of the light conversion agent and the emission color can be tuned from yellow-green to orange with variation of the light conversion agent. And the energy transfer efficiency increased and then decreased gradually as the concentration of the light conversion agent increased.