Synthesis of Sr2MgSi2O7:Eu, Dy and Sr2MgSi2O7:Eu, Dy, Nd by a modified solid-state reaction and their luminescent properties

Influence on luminescent properties of the Sr2MgSi2O7: Eu2+ by Dy3+, Nd3+ co-doping

“…Therefore the co-doping Dy 3+ and Nd 3+ can modify the trap depth in the host. This conforms to the previous research[14]. However, both the Nd 3+ and Dy 3+ are trivalent.…”

“…Generally, the traps for holes or electrons of the phosphors are created by the lattice defects [14,24,25]. However, the significant detailed investigations are still insufficient.…”

“…Both Dy 3+ and Nd 3+ provide the optimum trap depth. The research on Sr 2 MgSi 2 O 7 : Eu 3+ , Dy 3+ , Nd 3+ has been carried out by Song et al [14] recently. They found that these phosphors showed the red emission band which might be ascribed to the luminescent emission of Eu 3+ ions.…”

Optical Properties of Afterglow Nanoparticles : , Capped with Polyethylene Glycol

“…Figure 2 shows the optical properties of the target material. The PL spectrum (Figure 2(a)) with an excitation wavelength of 276 nm had a main, broad, blue-green peak at 466 nm, which was attributed to the f-d transitions of Eu 2+ ions [22]. The strong peak at approximately 555 nm represents the second-order scattering of the excitation light.…”

“…The PLE spectrum (Figure 2(b)) with an emission wavelength of 466 nm has 2 peaks at 275 nm and 361 nm. These peaks are due to defect levels of the host material; therefore, the peak shape is changed by the synthesis method [22]. The increase in absorbance less than 237 nm was probably caused by band-edge absorption of the host material, whose bandgap was 7.1 eV (175 nm) [23].…”