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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

SiO2气凝胶薄膜中Eu3+离子的跃迁

张步新; 赵伟明; 朱文清; 王克胜; 蒋雪茵   

  1. 上海大学材料科学工程学院, 上海 201800
  • 收稿日期:1999-07-14 修回日期:1999-08-26 出版日期:2000-08-20 网络出版日期:2000-08-20

Transition of Eu3+ Ion in SiO2 Aerogel Thin Film

ZHANG Bu-Xin; ZHAO Wei-Ming; ZHU Wen-Qing; WANG Ke-Sheng; JIANG Xue-Yin   

  1. School of Materials Science and Engineering; Shanghai University, Shanghai 201800; China
  • Received:1999-07-14 Revised:1999-08-26 Published:2000-08-20 Online:2000-08-20

PDF (PC)

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摘要： 利用溶胶－凝胶法制得了　 Ｅｕ３＋掺杂ＳｉＯ２气凝胶薄膜，并对其发光及跃迁性质进行了研究．使用原子力显微镜对样品的型貌结构做了观测，采用ＸＲＤ和ＩＲ对所得样品的结构进行了研究，测量了样品的激发－发射光谱、吸收光谱和时间分辨光谱．通过Ｊｕｄｄ－Ｏｆｅｌｔ理论计算了Ｅｕ３＋的５Ｄ０的辐射跃迁几率，并根据时间分辨光谱研究了５Ｄ１的无辐射跃迁几率及弛豫性质．虽然结果与掺Ｅｕ３＋的体硅玻璃没有很大差别，但可通过此简易低温的方法制得掺稀土离子的良好薄膜，这对得到具有轻质玻璃性质的发光薄膜展示了广阔应用前景．

关键词: SiO2气凝胶, 掺杂纳米微晶, 稀土发光中心, 时间分辨光谱

Abstract: The Eu3+ ion doped SiO2 aerogel film was prepared by a sol-gel process, and the luminescence and transitions of this aerogel film were investigated. The surface structure of the film was observed by AFM. Its microstructure was investigated
by XRD and IR. Its excitation, emission, absorption, and time-resolved spectra were measured. The luminescence properties were discussed. The radiative transition
probabilities of 5D0 energy levels in Eu3+ ion were calculated by Judd-Ofelt theory. According to the time-resolved spectra, the nonradiative transition probabilities
and decay properties of 5D1 were also studied. The results are not quite different to Eu3+ ion in silicate glass, but a fine thin film doped with rare earth ions
can be obtained by using a facile and low temperature method, and this film, having luminescent light glass qualities, can possess potential applications.

Key words: SiO2 aerogel, doped-nanocrystals, rare-earth luminescent centers, time-resolved emission spectroscopy

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