Prominent long-lasting photoluminescence in defect-activated zirconia: A rare-earth free and accessible phosphor

Kenichiro Iwasaki, Yoshihiro Takahashi, Nobuaki Terakado, Noriko Onoue, Tsuyoshi Shinozaki, Takumi Fujiwara

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We investigated the long-lasting photoluminescence (LLP) properties in a commercial zirconia powder with a monoclinic system after thermal treatment at different temperatures. Clear-blue photoluminescence and LLP were observed in the zirconia without emissive dopants subjected to thermal treatment at 1400 °C. Decay curve measurements revealed a pronounced, visually observable bluish LLP that lasted for ~ 10 h at moderate temperature. Based on spectroscopic observation and electron spin resonance results, a possible origin of the LLP is discussed.

Original languageEnglish
Pages (from-to)12929-12933
Number of pages5
JournalCeramics International
Issue number11
Publication statusPublished - 1 Aug 2018


  • Long-lasting photoluminescence
  • Rare-earth free
  • Thermal treatment
  • Zirconia

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