Study on Fabrication of Intense Fluorescent Oxides doped with Rare Earths

稀土掺杂强荧光氧化物的制备研究

• 批准号: 05453073
• 负责人: SHIMADA Masahiko
• 金额: $ 5.25万
• 依托单位: TOHOKU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05453073/
• 关键词: Tantalates; Intense emission; Blue luminescence; Green luminescence; Red luminescence; Energy migration; Fluorescent rare earth solid solution oxides; 希土類固溶蛍光体

Fluorescent Oxides doped with rare earths such as Tm^<3+>, Tb^<3+> and Eu^<3+> have attracted much attention because of their blue, green and red luminescence. However, an enriched quantity of rare earths frequently leads to a quenching phenomenon in luminescence owing to the energy transfer between rare earth ions i. e. concentration quenching. It is important to elucidate the quenching mechanism in oxides in order to realize intense fluorescence. In the present study, the luminescence properties of Tm^<3+>, Tb^<3+> and Eu^<3+> in (La_<1-X>R_X) Ta_7O_<19> (R=Tm, Tb, Eu) solid solutions were examined systematically. X-ray diffraction patterns of the solid solutions indicated wat the crystal structure consisted of a network of (La^<3+>_<1-X>R^<3+>_X, Ta^<5+>)-O^<2-> polyhedra interstratified with a double layr of Ta^<5+> -O^<2-> polyhedra. According to the emission spectra, the most intense emissions were found near 460nm and X=0.14 in (La_<1-X>Tb_X) Ta_7 O_<19>, near 547nm and X=0.8 IN (La_<1-X> Tb_X) Ta_7O_<19>, near 610nm and X=1.0 in (La_<1-X>Eu_X)Ta_7O_<19>. As a results, a low dimensional arrangement of Tm^<3+>, Tb^<3+> or Eu^<3+> was much more preferable for getting intense emission, because it reduced the energy migration between rare earth ions in (La_<1-X>R_X) Ta_7O_<19> solid solutions.

荧光氧化物掺有稀土，例如Tm^<3+>，Tb^<3+>和Eu^<3+>，由于其蓝色，绿色和红色的发光而引起了很多关注。然而，由于稀土离子I之间的能量转移，大量稀土量经常导致发光中的淬火现象。 e。浓度淬灭。为了实现强烈的荧光，阐明氧化物中的淬灭机制很重要。在本研究中，系统地检查了TM^<3+>，TB^<3+>和EU^<3+>的发光性能（LA__ <1-X> R_X）TA_7O_ <19>（R = TM，TB，TB，EU）实心溶液。固体溶液的X射线衍射模式表示晶体结构由（La^<3+> _ <1-x> r^<3+> _ x，ta^<5+>） - O^<2-> polyhedra组成。根据发射光谱，发现最激烈的排放量在460nm附近，x = 0.14 in（la_ <1-x> tb_x） （la_ <1-x> eu_x）ta_7o_ <19>。结果，TM^<3+>，TB^<3+>或EU^<3+>的低维排列对于获得强烈的排放更为可取，因为它减少了（LA__ <1-x> r_x）TA_7O__7O__7O_ <19>实心解决方案。

项目成果

M.Shimada: ""Luminescence properties of La_<1-X>Tm_XTa_7O_<19>"" Journal of Alloys and Compounds. 210. 103-108 (1994)

M.Shimada：“La_<1-X>Tm_XTa_7O_<19>的发光特性””合金与化合物杂志。

M.Shimada: "Luminescence of Eu^<3+> in La_<1-x>Eu_xTa_7O_<19>(0<x≦1)solid solution" Journal of Alloys and Compounds. 211(in press). (1995)

M.Shimada：“La_<1-x>Eu_xTa_7O_<19>(0<x≤1)固溶体中Eu^<3+>的发光”《合金与化合物杂志》211（出版中）。

島田昌彦: "Tm^<3+>付活YTa_7O_<19>の蛍光特性" 日本化学会誌. 630-634 (1993)

Masahiko Shimada：“Tm^<3+>激活的YTa_7O_<19>的荧光特性”日本化学学会杂志630-634（1993）。

M.Shimada: "Luminescence properties of La_<1-x>Tm_xTa_7O_<19>" Journal of Alloys and Compounds. 210. 103-108 (1994)

M.Shimada：“La_<1-x>Tm_xTa_7O_<19>的发光特性”合金与化合物杂志。

M.Shimada: ""Luminescence of Tm^<3+>-doped YTa_7 O_<19>"" Nihon-Kagakukai-shi. 630-632 (1993)

M.Shimada：“Tm^<3>掺杂的YTa_7 O_<19>的发光””日本化学会市。