| Abstract: The phosphors designed as Sr2-mMg1-nSi2O7∶mTb3+,nLi+(m=0.03~0.50, n=m) were prepared by the high temperature solid state reaction. Crystallization and optical properties were investigated by using powder X-ray diffraction and fluorescence spectrophotometer, respectively. Under the excitation of ultraviolet (377 nm), the emission spectra of these phosphors exhibit sharp multi-emission lines peaked at about 490 nm, 542 nm, 590 nm and 613 nm corresponding to the 5D4→7FJ(J=6, 5, 4, 3) typical transitions of Tb3+, respectively. The luminescence color can be tuned from blue to white, yellow and green by adjusting the doping concentration of Tb3+ ions. It had been found that the nominal composition Sr1.95Mg0.95Si2O7∶0.05Tb3+,0.05Li+ phosphor provides a white emission (0.322, 0.317) that is very close to the standard white (x=0.33, y=0.33), which shows that it is a potential single-phased white phosphor for LED-based UV-chip. |
| 陈 茜,史元元,陈宁远,赵君风,荣春英,余丽萍,廉世勋.Sr2MgSi2O7∶Tb3+，Li+荧光粉的合成和发光机理[J].无机化学学报,2012,28(2):233-238. |
