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采用溶胶-凝胶法制备了Lu2SiO5:Ce粉体。基于X射线衍射、透射电镜、紫外-可见激发发射、X射线激发发射和荧光衰减时间的测试,研究了溶胶-凝胶法制备的纳米Lu2SiO5:Ce粉体的物相结构和发光性能。结果表明:在1000℃煅烧2h得到粒径约为40nm的纯Lu2SiO5:Ce粉体;其激发谱中的最强激发峰在360nm处,发射谱中在398～407nm范围有以407nm为中心的宽发射峰,归因为Ce3+的4f-5d间的电子跃迁。在X射线激发下Lu2SiO5:Ce粉体的发光表现出二级发光衰减行为,衰减时间分别为τ1=10.98ns和τ2=39.32ns,相应的发光强度比例分别为73.38%和21.29%。
Lu2SiO5: Ce powders were prepared by sol-gel method. The phase structure and luminescent properties of nano-sized Lu2SiO5: Ce powders prepared by sol-gel method were studied based on X-ray diffraction, transmission electron microscopy, UV-visible excitation emission, X-ray excitation emission and fluorescence decay time. The results show that calcined at 1000 ℃ for 2h, pure Lu2SiO5: Ce powder with a particle size of about 40nm is obtained. The strongest excitation peak in the excitation spectrum is at 360nm and the emission spectrum has a width of 407nm in the range of 398 ~ 407nm The emission peak is attributed to the electron transition between 4f-5d of Ce3 +. Under X-ray excitation, the luminescence of Lu2SiO5: Ce powder shows the second-order luminescence decay time, the decay time is τ1 = 10.98ns and τ2 = 39.32ns respectively, and the corresponding luminescence intensities are 73.38% and 21.29% respectively.