| 纳米SrAl2O4∶Eu2+，Dy3+长余辉发光材料的制备与性能 |
| Synthesis and Luminescence Properties of Long-Lasting Phosphor SrAl2O4∶Eu2+，Dy3+ Nanoparticles |
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| 摘要: 采用水热-均匀共沉淀法制备了纳米SrAl2O4∶Eu2+，Dy3+长余辉发光材料。通过XRD、TEM、荧光光谱、热释光谱对其结构和性能进行分析。XRD结果表明所制备的SrAl2O4∶Eu2+，Dy3+纳米发光材料为单相，属单斜晶系。TEM测试表明纳米SrAl2O4∶Eu2+，Dy3+发光材料为规则的球状粒子，粒径为50~80 nm，且分散性良好。激发和发射光谱测试表明，样品的激发光谱是峰值在356 nm的连续宽带谱，发射光谱是峰值位于512 nm的宽带谱，与SrAl2O4∶Eu2+，Dy3+粗晶材料相比，激发和发射光谱都出现了“蓝移”现象。样品的热释光峰值位于358 K，适合于产生长余辉。 |
| 关键词: 水热-均匀共沉淀法 SrAl2O4:Eu2+, Dy3+ 纳米粉体 长余辉发光 |
| 基金项目: |
| Abstract: Long-lasting phosphor SrAl2O4∶Eu2+, Dy3+ nanoparticles were synthesized by hydrothermal-homogeneous precipitation method. The products were characterized by XRD, TEM, photo-luminescence and thermo-luminescence spectroscopy. The results of XRD indicate that the obtained SrAl2O4:Eu2+, Dy3+ sample possesses pure phase and monoclinic crystal structure. The results of TEM reveal that the SrAl2O4∶Eu2+, Dy3+ nanoparticles are well-dispersed with particle size ranging from 50 to 80 nm. The excitation and emission spectra of SrAl2O4∶Eu2+, Dy3+ sample are broad band spectra, and the main excitation peak is at 356 nm, the main emission is at 512 nm, which is blue shifted compared with SrAl2O4:Eu2+, Dy3+ coarse materials. The peak of the thermo-luminescence spectrum is at 358 K, which is suitable for the generation of long-lasting phosphorescence. |
| Keywords: hydrothermal-homogeneous precipitation method SrAl2O4∶Eu2+, Dy3+ nanoparticles long-lasting phosphorescence |
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| 肖 琴,肖丽媛,刘应亮.纳米SrAl2O4∶Eu2+，Dy3+长余辉发光材料的制备与性能[J].无机化学学报,2010,26(7):1240-1244. |
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