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Luminescence of ZrO2 nanocrystals

Donats Millers 2Witold Łojkowski 1Larisa Grigorjeva 2Agnieszka Opalińska 

1. Polish Academy of Sciences, High Pressure Research Center (UNIPRESS), Sokolowska 29/37, Warszawa 01-142, Poland
2. Institute of Solid State Physics, University of Latvia, 8 Kengaraga, Riga LV-1063, Latvia


The time-resolved luminescence have been studied for undoped and doped ZrO2 nanocrystals. The undoped and Pr doped nanocrystals had dominant tetragonal structure with small admixture of monoclinic fraction. The yttrium stabilized nanocrystals had cubic structure. The comparison of the luminescence from different structure nanocrystals was possible. The luminescence dependence on temperature for undoped ZrO2 nanocrystals shown that both - nonradiative transitions and luminescence center destroying are responsible for luminescence quenching. ZrO2:Pr nanocrystal luminescence shown dominant emission from Pr3+, indicating that intrinsic excitation in ZrO2 are very mobile and efficient energy transfer from matrix to dopand takes place. The luminescence dependence on temperature for ZrO2:Pr differs from that for undoped nanocrystals. The luminescence from cubic structure ZrO2 nanocrystal somewhat differs from this of tetragonal structure. The possible reasons are studied. On the one hand the yttrium admixture might be responsible for differencies observed. On the other hand IR absorption spectra indicates that the uncontrolled molecular impurities content in nanocrystals is different. The IR absorption spectra for ZrO2 and ZrO2:Pr indicates the same molecular impurities (however amount of them was different) whereas yttrium stabilized nanocrystals IR spectra shown additional groups of absorption lines.


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Presentation: oral at E-MRS Fall Meeting 2004, Symposium G, by Donats Millers
See On-line Journal of E-MRS Fall Meeting 2004

Submitted: 2004-05-05 13:53
Revised:   2009-06-08 12:55