| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1616769 | Journal of Alloys and Compounds | 2011 | 5 Pages |
Nanoparticles of Eu3+ doped Mg2SiO4 are prepared using low temperature solution combustion technique with metal nitrate as precursor and urea as fuel. The synthesized samples are calcined at 800 °C for 3 h. The Powder X-ray diffraction (PXRD) patterns of the sample reveled orthorhombic structure with α-phase. The crystallite size using Scherer's formula is found to be in the range 50–60 nm. The effect of Eu3+ on the luminescence characteristics of Mg2SiO4 is studied and the results are presented here. These phosphors exhibit bright red color upon excitation by 256 nm light and showed the characteristic emission of the Eu3+ ions. The electronic transition corresponding to 5D0 → 7F2 of Eu3+ ions (612 nm) is stronger than the magnetic dipole transition corresponding to 5D0 → 7F1 of Eu3+ ions (590 nm). Thermoluminescence (TL) characteristics of γ-rayed Mg2SiO4:Eu3+ phosphors are studied. Two prominent and well-resolved TL glows with peaks at 202 °C and 345 °C besides a shoulder with peak at ∼240 °C are observed. The trapping parameters-activation energy (E), order of kinetics (b) and frequency factor (s) are calculated using glow curve shape method and the results obtained are discussed.
► Europium doped Forsterite (Mg2SiO4:Eu3+) nanocrystalline phosphor is prepared using solution combustion technique. ► The PXRD pattern showed the alpha phase with orthorhombic structure and the particle size is in the nano scale. ► The UV-VIS absorption of pure and Eu3+ doped phosphor show an intense absorption in the region 240–270 nm. It exhibits different emission lines in 480 nm to 800 nm range. ► The transition centered at 611 nm is found to be hypersensitive in nature due to strong red emission. ► The phosphor shows good TL response due to presence of deep traps. Further, it is suggested that it is an excellent candidate in display devises.
