Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Synthesis and Photoluminescence Studies on Sr1-xBaxAl2O4 : Eu2+, Dy3+

  • Ryu, Ho-Jin (Energy Materials Research Centre, Korea Research Institute of Chemical Technology) ;
  • Singh, Binod Kumar (Minerals and Materials Processing Research Division, Korea Institute of Geoscience and Mineral Resources) ;
  • Bartwal, Kunwar Singh (Laser Materials Development & Devices Division, Raja Ramanna Centre for Advanced Technology)
  • Published : 2008.03.31
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Abstract

Strontium-substituted $Sr_{1-x}Ba_xAl_2O_4:Eu^{2+},\;Dy^{3+}$ compositions were prepared by the solid state synthesis method. These compositions were characterized for their phase, crystallinity and morphology using powder x-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques. Photoluminescence properties were investigated by measuring excitation spectra, emission spectra and decay time for varying Ba/Sr concentrations. Photoluminescence results show higher luminescence and long decay time for $Sr_{1-x}Ba_xAl_2O_4:Eu^{2+},\;Dy^{3+}$(x=0). This is probably due to the influence of the 5d electron states of $Eu^{2+}$ in the crystal field. Long persistence was observed for these compositions due to $Dy^{3+}$ co-doping.

Keywords

References

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