| 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 |
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| ABSTRACT |
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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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