以亚甲基双丙烯酰胺为网络剂, 采用高分子网络凝胶法合成了Sr2CeO4∶Dy3+荧光粉, 并表征其结构、 颗粒形貌及发光性能。 研究结果表明: Sr2CeO4∶Dy3+无其他杂相存在且粉末颗粒大小均匀。 其紫外-可见吸收带集中在480 nm附近; 在370 nm紫外光激发下, 其发射图谱为一多峰发射; 监测470 nm的发射峰, 所得样品的激发谱为一双峰宽谱, 峰位为292和338 nm。 同时研究了Dy3+掺杂浓度对样品发射光谱的影响, 结果显示, 随着Dy3+浓度的增大, 其黄、 蓝发射峰强度比值逐渐增大, 但发光强度呈现先增大后减小的趋势, 在Dy3+掺杂浓度为0.4 mol%时达到最大值。

In the present article, Sr2CeO4∶Dy3+ was synthesized with N,N-methylene bisacrylamide (MBAA) as the net agent. The structure, morphology and luminescent properties were also characterized. It is indicated that Sr2CeO4∶Dy3+ was single-phased without other phase existing and also had good dispersion The UV-visible absorption spectra suggested that the absorption bands were almost at 480 nm. The excitation spectrum for 270 nm emission has several excitation bands; The emission spectrum of Sr2CeO4∶Dy3+ shows two broad bands at 292 and 338 nm under the 370 nm excitation. The effects of Dy3+ doping concentration on the emission spectrum intensity of Sr2CeO4∶Dy3+ were also studied, the results showed that the ratio of yellow emission to blue emission increases with increasing the Dy3+ doping concentration, but with increasing the Dy3+ doping concentration, the emission intensity firstly increased, then decreased, and the maximal emission intensity was at 0.4mol% Dy3+ concentration.