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

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

*この研究の対応する著者

研究成果: Article査読

14 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)6858-6862
ページ数5
ジャーナルJapanese journal of applied physics
47
8 PART 3
DOI
出版ステータスPublished - 2008 8月 22

ASJC Scopus subject areas

  • 工学(全般)
  • 物理学および天文学(全般)

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