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J. Korean Ceram. Soc. > Volume 45(3); 2008 > Article
Journal of the Korean Ceramic Society 2008;45(3): 146.
doi: https://doi.org/10.4191/kcers.2008.45.3.146
Synthesis and Photoluminescence Studies on Sr1-xBaxAl2O4 : Eu2+, Dy3+
Ho-Jin Ryu, Binod Kumar Singh1, Kunwar Singh Bartwal2
Energy Materials Research Centre, Korea Research Institute of Chemical Technology
1Minerals and Materials Processing Research Division, Korea Institute of Geoscience and Mineral Resources
2Laser Materials Development & Devices Division, Raja Ramanna Centre for Advanced Technology
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.
Key words: Solid-solution, X-ray diffraction, SEM, Photoluminescence
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