| Popis: |
Being added by H3BO3 as flux, the nanosize strong green phosphor Zn2SiO4: Mn2+ was prepared by an improved sol-gel method. The structure and the morphology of the samples were examined by XRD, UV-VL spectrophotometer and SEM. The photoluminescence properties were measured by fluorescence spectrometer. Results show that, when the samples were annealed at 850°C for 2 hours, the intensity of emission spectrum of the sample is not strictly followed the monotonically increasing with the increase of Mn2+ doping concentration. It appears in a fluctuated tendency with the increase of doping concentration. In the 4% Mn2+ doping concentration and annealing temperature 950°C, the most strong green emission spectrum can be obtained. The mechanism of luminescence properties of this kind of material is analyzed. |
