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The time-resolved luminescence characteristics of Ce and Ce/Pr doped YAG ceramics obtained by high pressure technique |
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| Authors: | L Grigorjeva D MillersK Smits A SarakovskisW Lojkowski A Swiderska-SrodaW Strek P Gluchowski |
| Affiliation: | a Institute of Solid State Physics, University of Latvia, 8 Kengaraga, LV-1063 Riga, Latvia b Institute of High Pressure Physics, Polish Academy of Sciences, Sokolowska 29, Warshaw, Poland c Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Okolna 2, Wroclaw, Poland |
| Abstract: | Transparent Ce and Ce/Pr doped YAG ceramics were prepared under high pressures (up to 8 GPa) and relative low temperature (450 °C). Grain size of the ceramics is less than 50 nm. However unknown defects or disorders strains on grain boundaries caused the additional absorption in these ceramics. The luminescence intensity, spectra and the decay time dependence on pressure applied during ceramic preparation were studied. Concentration of some intrinsic point defect was reduced under the high pressure applied for sintering process.It is shown that formation time of the excited state of Ce luminescence depends on the pressure applied during ceramic sintering. |
| Keywords: | Photoluminescence Time-resolved luminescence YAG ceramic |
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