Energy Transmission and Charge Transfer between Rare Earth Ions of Nanometer Fluorides

Energy Transmission and Charge Transfer between Rare Earth Ions of Nanometer Fluorides
　　Nanoparticles of doped and co-doped KMgF3 with rare earth ions were prepared from the quaternary microemulsions of CTAB, n-butanol, http://www.chinamagnets.biz/ n-octane and water based on the pseudo-ternary phase diagrams.The X-ray diffraction (XRD) patterns were indexed to a pure KMgF3 cubic phase. The fluorescent spectra were studied and compared with their powder crystal. Energy transmission and charge transfer between rare earth ions of nanometer fluorides were discussed.The emission of prepared KMgF3: Eu nanoparticles peaked at 360 nm. The excitation band strong magnets was observed at 250 nm, blue shifted separately about 62 nm and 80 nm comparing with KMgF3: Eu multicrystal powders and single crystal. The maximum peak of KMgF3: Gd nanoparticles located at 311nm attributed to the transition of 6P7/2→8S7/2We can conclude there is charge transfer process of Ce3+→Yb3+ in KMgF3: Ce, Yb nanoparticles. The energy transmission Ce3+→Tb3+, Ce3+→Gd3+ and Ce3+→Eu2+exist in KMgF3: Ce, Tb and KMgF3: Ce, Gd and KMgF3: Ce, Eu nanoparticles.