Luminescence of Eu3+ Ions in Nanocrystalline Zirconia
LIU Huang-qing, QIN Wei-ping, ZHANG Ji-sen
Key Laboratory of Excited State Processes, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130021, China
Abstract:Zirconia doped with 1 mol% Eu3+ and annealed at 600, 800 and 1 000 ℃ and zirconia doped with 1 mol%, 3 mol%, 5 mol% Eu3+ and annealed at 800 ℃ were prepared by co-precipitation method; luminescence of Eu3+ions was investigated under 394 nm excitation, and the emission of 5D0→7F2 was peaked at 604 nm in zirconia annealed at 600 and 800 ℃, however, peaked at 610 nm in the sample annealed at 1 000 ℃. By studying Ω2 of 5D0→7F2, the authors found that Ω2 increased with increasing annealing temperature. When monitored with 604 nm, the authors foundthat the contribution of population of 5L6 level to the luminescence of 5D0→7F2 increased with increasing annealing temperature. By investigating the luminescence in the samples doped with 1 mol%, 3 mol% and 5 mol% Eu3+ions, we found that the emission of 5D0→7F1 transition for the sample doped with 3 mol% Eu3+ions was a broad band peaked at 597 nm.
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