| 纳米X1-Y2SiO5∶Eu的制备与格位选择激发下的光致发光研究 |
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| 引用本文： | 尹 民,楼立人,张慰萍,夏上达,J.C.KRUPA.纳米X1-Y2SiO5∶Eu的制备与格位选择激发下的光致发光研究[J].物理学报,1998,47(7):1207-1212. |
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| 作者姓名： | 尹 民 楼立人 张慰萍 夏上达 J.C.KRUPA |
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| 作者单位： | (1)法国国家科研中心Orsay核物理研究所; (2)中国科学技术大学物理系，合肥 230026; (3)中国科学院长春物理研究所激发态物理开放研究实验室，长春 130021 |
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| 基金项目： | 国家自然科学基金(批准号：19674052)和国家教育委员会留学回国人员科学研究启动基金及中国科学院留学经费择优支持基金资助的课题. |
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| 摘 要： | 采用溶胶-凝胶法制备了纳米微晶X1-Y2SiO5∶Eu，研究了室温和15K下的光致发光特性.透射电子显微镜的测量结果表明，样品的平均粒径为50nm.通过低温下的格位选择激发，分别得到X1-Y2SiO5∶Eu中两种格位的Eu3+离子各自的光致发光光谱，确定了谱峰位置.在格位选择激发下，两种格位的发光衰减均呈很好的单指数关系，5D关键词：
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| 关 键 词： | 发光学 硅酸盐 纳米微晶 光致发光 格位选择 |
| 收稿时间： | 1997-10-27 |
PREPARATION AND SITE SELECTIVELY EXCITED LUMINESCENCE OF NANOMETRIC SCALE X1-Y2SiO5∶Eu |
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| YIN MIN,LOU LI-REN,ZHANG WEI-PING,XIA SHANG-DA and J.C.KRUPA.PREPARATION AND SITE SELECTIVELY EXCITED LUMINESCENCE OF NANOMETRIC SCALE X1-Y2SiO5∶Eu[J].Acta Physica Sinica,1998,47(7):1207-1212. |
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| Authors: | YIN MIN LOU LI-REN ZHANG WEI-PING XIA SHANG-DA and JCKRUPA |
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| Abstract: | Nanometric Scale X1-Y2SiO5∶Eu was prepared by sol-gel method with particle size about 50nm.The optical properties of the sample were investigated.Its luminescence spectra were recorded at room temperature and 15K using site selective excitation by a dye laser in addition to conventional UV excitation.Site selective excitation gave two sites for the Eu3+ ion in X1-Y2SiO5.These two sites differ significantly from each other as stated by their emission spectra.Wavelengths of the 5D0→7F0—4 transitions of the two sites were tabulated.Lifetimes of the 5D0 energy level were also measured. They are 3.00ms (site 1) and 2.18ms (site 2). |
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