Fluorescence in β-Al_2O_3-Like Materials of K, Ba and La Activated with Eu^<2+> and Mn^<2+>

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概要

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• Incorporation of Mn^<2+> and Eu^<2+> ions in β-Al_2O_3-like host crystals has been studied. Under ultraviolet excitation, both BaO・6Al_2O_3 : Eu, Mn and La_2O_3・11Al_2O_3 : Eu, Mn show intense green fluorescence caused by the energy transfer from Eu^<2+> to Mn^<2+>. The efficiency of the luminescence is comparable to that of Zn_2SiO_4 : Mn when excited by 254 nm light. Emission and excitation spectra of the phosphors were compared with those of K β-Al_2O_3. The difference in the atomic packing in the mirror plane of these aluminates appears to be reflected in the emission spectra of Mn^<2+>. The quenching temperature for the sensitized fluorescence of Mn^<2+> is governed by the Eu^<2+> ions, replacing mono-, di-, or tri-valent large cations in these compounds.

• 社団法人応用物理学会の論文
• 1974-06-05

著者

• Tamatani Masaaki

  Toshiba Research And Development Center Tokyo Shibaura Electric Co. Ltd.

関連論文

• Fluorescence in β-Al_2O_3-Like Materials of K, Ba and La Activated with Eu^ and Mn^
• Depreciation of β-Al_2O_3-Like Phosphors under Ultraviolet Irradiation

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