用高温固相法制备了Sr7Zr(PO4)6∶Tb3+、Sr7Zr(PO4)6∶Ce3+及Sr7Zr(PO4)6∶Tb3+, Ce3+一系列荧光粉, 并通过X射线衍射仪及荧光光谱仪分析了其结构和发光性质。结果表明, Sr7Zr(PO4)6∶Tb3+呈现特征绿色发射, 最强发射峰位于543 nm, 属于Tb3+的5D4→7F5跃迁, 激发峰位于226 nm处, 但激发带较窄。为拓宽其激发带的宽度, 在Sr7Zr(PO4)6∶Tb3+中掺入了Ce3+, 观察到掺入Ce3+后激发带变宽, 且在Ce3+的激发波长处激发得到了Tb3+的发射, 表明存在Ce3+到Tb3+的能量传递。

The phosphors of Sr7Zr(PO4)6∶Tb3+, Sr7Zr(PO4)6∶Ce3+ and Sr7Zr(PO4)6∶Tb3+, Ce3+ were prepared by the solid-state reaction. The structures of these powders were characterized by X ray diffractometer (XRD). The excitation and emission spectra were characterized by spectrofluorimeter. The excitation spectrum of Sr7Zr(PO4)6∶Tb3+ shows a narrower band in the range of 200-250 nm with the maximum centered at 226 nm, which belongs to 7FJ→7DJ transition of Tb3+. The photoluminescence spectra of Sr7Zr(PO4)6∶Tb3+ exhibits four emission peaks. The strongest green emission peak is at 543 nm which belongs to 5D4→7F5 transition of Tb3+. The excitation spectrum of Sr7Zr(PO4)6∶Ce3+ shows a broad band centered at 289 nm and the emission peak is at 374 nm. In order to broaden the width of the excitation band of Sr7Zr(PO4)6∶Tb3+, Ce3+ ions are incorporated. It is found that the excitation band became broader. The excitation spectrum of Sr7Zr(PO4)6∶Ce3+, Tb3+ shows two broad bands, respectively, the former belongs to the excitation of Tb3+ and the latter belongs to the excitation of Ce3+. The emission spectra of Sr7Zr(PO4)6∶Ce3+, Tb3+ exhibit strong emission peaks of Tb3+ excited by 289 nm, which is the excitation band center of Ce3+. It is speculated that the energy transfer occurs from Ce3+ to Tb3+.