Ce激活氯化钠在真空紫外光激发下的发光性质

Luminescence Properties of Sodium Chloride Activated with Ce under Vacuum Ultraviolet Excitation

采用水热蒸发法制备了NaCl∶Ce3+荧光粉,并通过X射线衍射(XRD)研究了材料的晶体结构。测量并分析材料在室温下的真空紫外激发光谱及相应的发射光谱。结果表明309和324nm的发射峰,对应于Ce3+离子的5d→4f(2 F5/2,2 F7/2)跃迁;激发谱显示6个峰,峰位分别为148,190,205,216,232和247nm。148nm的激发峰是基质吸收引起的;190,205,216,232和247nm是Ce3+的4f→5d跃迁引起的。

A series of NaCl∶Ce3＋ phospors were prepared by hydrothermal approach.The crystal structure was checked by X-ray diffraction,and the result showed that all the samples are of single phase.The VUV excitation and emission spectra were measured at room temperature.Two emission peaks at about 309 and 324 nm were obsereved and they were ascribed to 5d→4f（2F5/2,2F7/2） transitions of.The excitation spectra contain two broad bands at 148 and 247 nm respectively.The peak at 148 nm can be attributed to the host related absorption and that at 190,205,216,232 and 247 nm is due to the 4f→5d transitions of Ce3＋.