| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1607903 | Journal of Alloys and Compounds | 2016 | 7 Pages |
•MgAl2O4:Eu3+ nanocrystalline phosphors were prepared by modified Pechini method.•Doping concentration effect on structural and luminescence properties was studied.•Different excitation mechanism leads to difference of optimum doping concentration.•Judd–Ofelt parameters were calculated using 4f–4f intensity theory.
Cubic Eu3+-doped MgAl2O4 nanocrystalline phosphors were synthesized via modified Pechini method. Doping concentration effect on the structural and luminescence properties was studied. Photoluminescence spectra consist of quite wide lines due to the Eu3+ multisite distribution. The optimal doping concentration in MgAl2O4 host depends on excitation mechanism. Additional process of de-excitation in case of λex = 260 nm results in earlier concentration quenching. Energy migration with subsequent quenching on impurities is the main reason for high nonradiative decay rate of highly doped samples.
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