Quenching Properties of Fluorescence by Voltage Application in Organic Solutions Containing Rare Earth Ions

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  • SATO Susumu
    Department of Electronic Engineering, Mining College, Akita University

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Other Title
  • 希土類イオンを含む有機溶液における蛍光の電圧印加による消光特性
  • 希土類イオンを含む有機溶液における蛍光電圧印加による消光特性--透明絶縁薄膜による特性の改善
  • キドルイ イオン オ フクム ユウキ ヨウエキ ニ オケル ケイコウ デンアツ
  • Improvement in Properties by Transparent Insulating Films
  • 透明絶縁薄膜による特性の改善

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Description

The quenching of ultraviolet-stimulated fluorescence by voltage application in organic solutions of europium benzoyl-trifluoroacetonate are investigated using sandwich-type cells with transparent insulating films of SiO2, SiO, or ZnS. Four types of fluorescent cells are prepared by taking into consideration the relationship among the direction of UV irradiation, arrangement of the electrode coated with insulating films, and the polarity of the applied voltage. It is seen that electric charge transfer between the electrode and the rare earth ions does not take place at the electrode coated with insulating films, where the fluorescent Eu (III) cannot be reduced to nonfluorescent Eu(II). The serious deterioration in the fluorescent properties that is observed at the time of application of the recovering voltage can, therefore, be improved by using a counter electrode with insulating films. Red fluorescence can be switched by alternately applying the quenching voltage and the recovering voltage across the cells.

Journal

  • Oyo Buturi

    Oyo Buturi 53 (2), 157-161, 1984

    The Japan Society of Applied Physics

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