Energy Transfer in Co-doped KMgCl3 : Ce3+-Eu3+ Phosphor
Keywords:
Photoluminescence, Phosphor, XRD, Co-dopedAbstract
The present work discusses photoluminescence in KMgCl3 singly doped by Ce3+ ions and Eu3+ions independently and co-doped. Co-doped phosphor showed transfer of energy between a sensitizer ion Ce to an activator ion Eu and resulted into enhancement in photoluminescence emission. Phosphors have been prepared using wet chemical synthesis. XRD pattern of KMgCl3 matched with the standard JCPDS file 20-0905. The PL emission spectra have been observed for Ce3+ at 353nm and 375nm due to 5d-4f transition at excitation wavelength of 338 nm. PL of Eu3+ is peaking at 596nm and 616nm at excitation wavelength of 394 nm in orange and red region due to 5D0-7F1 and 5D0-7F2 transition.
KMgCl3:Ce3+,Eu3+ have two peaks in PL emission spectra in orange-red region of the spectrum at 596 nm and 616nm by UV excitation at 268nm due to transitions of Eu3+ ion with improved luminescence properties. The energy transfer from Ce3+ to Eu3+ has been discussed based on the excitation and emission spectra.
The present work discusses photoluminescence in KMgCl3 singly doped by Ce3+ ions and Eu3+ions independently and co-doped. Co-doped phosphor showed transfer of energy between a sensitizer ion Ce to an activator ion Eu and resulted into enhancement in photoluminescence emission. Phosphors have been prepared using wet chemical synthesis. XRD pattern of KMgCl3 matched with the standard JCPDS file 20-0905. The PL emission spectra have been observed for Ce3+ at 353nm and 375nm due to 5d-4f transition at excitation wavelength of 338 nm. PL of Eu3+ is peaking at 596nm and 616nm at excitation wavelength of 394 nm in orange and red region due to 5D0-7F1 and 5D0-7F2 transition.
KMgCl3:Ce3+,Eu3+ have two peaks in PL emission spectra in orange-red region of the spectrum at 596 nm and 616nm by UV excitation at 268nm due to transitions of Eu3+ ion with improved luminescence properties. The energy transfer from Ce3+ to Eu3+ has been discussed based on the excitation and emission spectra.
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