Defects in yttria-stabilized zirconia induced by irradiation of ultraviolet photons

Takaaki Morimoto, Masayuki Takase, Toshihide Ito, Hiromitsu Kato, Yoshimichi Ohki

    Research output: Contribution to journalArticle

    12 Citations (Scopus)

    Abstract

    When single-crystal yttria-stabilized zirconia samples are exposed to ultraviolet photons with an energy higher than 4.0 eV, three paramagnetic centers are observed at g = 2.006, 1.97-1.95, and 1.91-1.86. With irradiation by ultraviolet photons, an absorption band and a photoluminescence (PL) band are also induced, showing respective peak energies at around 3.3 and 2.8 eV. The onset of the PL-excitation spectrum occurs around 4.0 eV. The induced absorption band and paramagnetic centers disappear with thermal annealing. By doing a numerical analysis on the experimentally obtained angular dependence of the signal at g = 1.91-1.86, it is determined that signals at g = 2.006 and 1.91-1.86 are due to the F+ center and the T center, respectively, and that the signal at g = 1.97-1.95 has some origin other than the two ESR centers. Since two ESR signals at g = 2.006 and 1.97-1.95, the 3.3-eV absorption, and the 2.8-eV PL have the same onset energy at around 4.0eV, the reactions that induce them are triggered by electrons excited into the conduction band tail.

    Original languageEnglish
    Pages (from-to)6858-6862
    Number of pages5
    JournalJapanese Journal of Applied Physics
    Volume47
    Issue number8 PART 3
    DOIs
    Publication statusPublished - 2008 Aug 22

    Fingerprint

    Yttria stabilized zirconia
    yttria-stabilized zirconia
    Photoluminescence
    Photons
    Irradiation
    Defects
    irradiation
    Paramagnetic resonance
    Absorption spectra
    defects
    photons
    photoluminescence
    Conduction bands
    absorption spectra
    Numerical analysis
    color centers
    Single crystals
    Annealing
    numerical analysis
    energy

    Keywords

    • Absorption
    • Anisotropy
    • EPR
    • ESR
    • Luminescence
    • Photoluminescence
    • Thermal annealing
    • Ultraviolet photon
    • YSZ
    • Zirconia

    ASJC Scopus subject areas

    • Engineering(all)
    • Physics and Astronomy(all)

    Cite this

    Defects in yttria-stabilized zirconia induced by irradiation of ultraviolet photons. / Morimoto, Takaaki; Takase, Masayuki; Ito, Toshihide; Kato, Hiromitsu; Ohki, Yoshimichi.

    In: Japanese Journal of Applied Physics, Vol. 47, No. 8 PART 3, 22.08.2008, p. 6858-6862.

    Research output: Contribution to journalArticle

    Morimoto, Takaaki ; Takase, Masayuki ; Ito, Toshihide ; Kato, Hiromitsu ; Ohki, Yoshimichi. / Defects in yttria-stabilized zirconia induced by irradiation of ultraviolet photons. In: Japanese Journal of Applied Physics. 2008 ; Vol. 47, No. 8 PART 3. pp. 6858-6862.
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