Lang T.-C.,Chongqing University of Arts and Sciences |
Lang T.-C.,Chongqing University of Technology |
Han T.,Chongqing University of Arts and Sciences |
Han T.,Chongqing Engineering Research Center for Optoelectronic Materials and Devices |
And 8 more authors.
Faguang Xuebao/Chinese Journal of Luminescence
Sr3SiO5:Ce3+, Li+ phosphors were synthesized by the high temperature solid state reaction method. The crystal structure and luminescent properties of the samples were analyzed by X-ray diffraction and fluorescence spectrophotometer. Sr3-2xSiO5:xCe3+, xLi+ samples with tetragonal phase structure can be synthesized at 1420°C. The excitation spectral distribution is in the near-ultraviolet range of 270~500 nm with two bands, and the double peak positions are located at 328 nm and 410 nm, respectively. The emission spectrum under 410 nm near-ultrviolet excitation shows a broad band centered at 528 nm. The optimum doping content of Ce3+ is x(Ce3+)=0.8%. With the increase of doping concentration, the luminescence intensity firstly increases and then decreases because of the concentration quenching effect. The concentration quenching is attribute to the dipole-dipole interaction of Ce3+, according to Dexter theory. Source