| Synthesis and Luminescent Properties of Nano-scale Y2Si2O7:Re3+ (Re=Eu, Tb) Phosphors via Sol-Gel Method |
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| 作者姓名： | 李勇 游宝贵 赵伟 张慰萍 尹民 |
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| 作者单位： | 中国科学技术大学合肥微尺度物质科学国家实验室，合肥230026；中国科学技术大学物理系，合肥230026;中国科学技术大学合肥微尺度物质科学国家实验室，合肥230026;中国科学技术大学合肥微尺度物质科学国家实验室，合肥230026;中国科学技术大学合肥微尺度物质科学国家实验室，合肥230026;中国科学技术大学合肥微尺度物质科学国家实验室，合肥230026；中国科学技术大学物理系，合肥230026 |
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| 基金项目： | 国家自然科学基金,高等学校博士学科点专项科研基金 |
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| 摘 要： | 用溶胶凝胶方法制备了稀土离子掺杂的焦硅酸钇纳米粉末，并用XRD对不同温度处理的样品结构进行了表征，结果表明1000 ℃时产物成α-Y2Si2O7相，粒径约为27 nm，且掺杂离子的浓度并不影响样品的结构，测量了Eu3+和Tb3+离子掺杂的样品的激发谱和发射谱，并对其进行了分析．激发谱中真空紫外区对应基质的吸收，紫外区分别对应Tb3+的4f~5d的吸收Eu3+的电荷迁移带的吸收，对发光强度随掺杂离子浓度的变化关系也进行了讨论．对室温下的寿命进行了测量和分析．
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| 关 键 词： | 发光，溶胶-凝胶法，焦硅酸钇，稀土 |
| 收稿时间： | 2007/11/18 0:00:00 |
| 修稿时间： | 2008/3/11 0:00:00 |
Synthesis and Luminescent Properties of Nano-scale Y2Si2O7:Re3+ (Re=Eu, Tb) Phosphors via Sol-Gel Method |
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| Yong Li,Bao-gui You,Wei Zhao,Wei-ping Zhang and Min Yin.Synthesis and Luminescent Properties of Nano-scale Y2Si2O7:Re3+ (Re=Eu, Tb) Phosphors via Sol-Gel Method[J].Chinese Journal of Chemical Physics,2008,21(4):376-380. |
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| Authors: | Yong Li Bao-gui You Wei Zhao Wei-ping Zhang and Min Yin |
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| Institution: | Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China; Department of Physics, University of Science and Technology of China, Hefei 230026, China;Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China;Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China;Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China;Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China; Department of Physics, University of Science and Technology of China, Hefei 230026, China |
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| Abstract: | By using metal nitrates as starting materials and citric acid as a complexing agent, Y2Si2O7:Re3+ (Re=Eu, Tb) phosphors were prepared by a sol-gel method. X-ray diffraction was employed to characterize the resulting samples. The results of XRD indicate that the ff-Y2Si2O7 nanocrystal with size of 27 nm is obtained at 1000 oC and the doping ion content does not influence the structure. The excitation spectra in the UV and VUV ranges and the emission spectra of Re3+ doped samples were measured. The excitation spectra in the VUV range is due to absorption of host, that in the UV range is ascribed to absorption transitions from 4f to 5d state of the Tb3+ and the charge transfer in the Eu3+-O2- bond. The spectral energy distribution of the Tb3+ emission depends strongly on the Tb3+ concentration. The dependence of photoluminescence intensity on Re3+ concentration is also discussed in detail. The fluorescent decay curves at room temperature were measured and analyzed. |
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| Keywords: | Luminescence Sol-gel Y2Si2O7 Rare earth |
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