Synthesis and Luminescent Properties of Mn2+-Doped Zinc Silicate Phosphors by Sol-Gel Method

摘要

Green light emitting Mn2+-doped Zn2SiO4 (Zn2SiO4∶Mn2+) phosphor nano-particles were synthesized by sol-gel method combined with a furnace firing from the sol-gel solution made with ZnO,MnCO3 and tetraethoxysilan.The influences of annealing temperatures on the microstructures and photoluminescent properties of the Zn2SiO4∶Mn2+ phosphors were investigated.The structural details of the phosphors were examined through XRD and SEM.The photoluminescent properties of the Zn2SiO4∶Mn2+ phosphors were characterized by excitation and emission spectra.The results indicate that the XRD patterns of the Zn2SiO4∶Mn2+ phosphors exhibit a willemite structure (α-Zn2SiO4).Green photoluminescence whose emission peak is located at 525 nm were observed from the synthesized phosphor particles under UV excitation.The photoluminescent mechanisms of the Zn2SiO4∶Mn2+ phosphors were discussed.