Novel trichromatic phosphor Co-doped with Eu, Tb in SiO2 gel matrix |
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作者姓名: | HU XiaoYun FAN Jun LI Ting ZHANG DeKai BAI Jinmao REN ZhaoYu HOU Xun |
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作者单位: | [1]Department of Physics, Northwest University, Xi'an 710069, China [2]Chemical Engineering College, Northwest University, Xi'an 710069, China [3]Institute of Photonics & Photon-Technology, and Provincial Key Laboratory of Photo Electronic Technology, Northwest University, Xi'an 710069, China [4]State Key Laboratory of Transient Optics and Technology, Xi'an Institute of Optics & Precision Mechanics, Chinese Academy of Sciences, Xi'an 710068, China |
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基金项目: | Supported by the National Natural Science Foundation of Director (Grant No. 10247007), Natural Science Foundation of Shanxi Province (Grant No. 2003F22), and the Science Technology Department of Shanxi Province (Grant No. 2004k05-G26) |
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摘 要: | The Eu, Tb co-doped SiO2 matrix tricolor fluorescence system was prepared by sol-gel technique. Red emission at 618 nm, green emission at 543 nm and blue emission at 350-500 nm were observed in the PL spectra of the sample, indicating that Eu^3+, Eu^2+ and Tb^3+ ions coexisted in the matrix. In the co-doped sample, the blue emission of Eu^2+ was much stronger than that of the sample single doped with Eu, which implied that the electron transfer between Eu^3+ and Tb^3+ maybe happened in the SiO2 matrix. The influences of the annealing temperature and Tb concentration on the PL spectra of the samples were investigated. The optimal doped concentration of Tb was determined to be 0.2% and the optimal annealing temperature 850℃. Annealed at 600℃, Tb^3+ had a sensitizing effect on Eu^3+ in the SiO2 matrix, and the emission intensity of Eu^3+ in the Eu, Tb co-doped sample was more than four times that of the single doped sample, which could be attributed to the energy transfer from Tb^3+ to Eu^3+.
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关 键 词: | 二氧化硅凝胶基质 三原色荧光系统 稀土 铕 铽 磷光粉 共掺杂 电子传递 能量传递 |
收稿时间: | 22 August 2006 |
修稿时间: | 2006-08-22 |
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