Photoluminescence spectral change in self-assembled layered titanate oxide intercalated with Eu3+

Shintaro Ida, Ugur Unal, Kazuyoshi Izawa, Chikako Ogata, Yasumichi Matsumoto

    研究成果: 書籍/レポート タイプへの寄稿会議への寄与


    Titanate layered oxide intercalated with hydrated Eu3+ was synthesized by the electrostatic self-assembly deposition (ESD) method. The emission intensity of Eu3+ decreased rapidly with time during irradiation by UV light having energy higher than the band gap energy of the host Ti1.81O4 (TiO) layer. This is presumably due to the decrease in energy transfer from the host TiO layer to Eu3+ as a result of the change in the hydration state of water molecules surrounding Eu3+, which is caused by the hole produced in the TiO valence band. When irradiation was discontinued, the emission intensity gradually recovered. The recovery time increased when the water in the interlayer is removed by heat treatment. This indicates that the state of interlayer water changes during irradiation and returns to its initial state after discontinuation of irradiation. The excitation spectra changed drastically at any given wavelength upon irradiation with UV light. A comparison of the excitation spectra before and after irradiation reveals that only the excitation peak at around the irradiation wavelength decreased upon irradiation, as in the case of spectral hole burning. The hydration state of water molecules surrounding Eu3+ presumably changes depending on the irradiation wavelength.

    ホスト出版物のタイトルSolid-State Chemistry of Inorganic Materials VI
    出版社Materials Research Society
    出版ステータス出版済み - 2006
    イベント2006 MRS Fall Meeting - Boston, MA, 米国
    継続期間: 11月 27 200612月 1 2006


    名前Materials Research Society Symposium Proceedings


    その他2006 MRS Fall Meeting
    CityBoston, MA

    !!!All Science Journal Classification (ASJC) codes

    • 材料科学(全般)
    • 凝縮系物理学
    • 材料力学
    • 機械工学


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