College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, PR China.
J Colloid Interface Sci. 2010 Mar 1;343(1):71-8. doi: 10.1016/j.jcis.2009.11.025. Epub 2009 Nov 14.
Rare-earth ions (Eu(3+), Dy(3+), Sm(3+)) doped YVO(4) microspheres with uniform morphologies were successfully prepared via a simple hydrothermal route using N,N-dimethylformamide (DMF) as the solvent and polyvinylpyrrolidone (PVP) as protective agent. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), photoluminescence (PL) spectra, and the kinetic decays were employed to examine the resulting phase formation, particle morphology and luminescent properties. The XRD results reveal that all the doped samples are of high crystallization which are assigned to the pure tetragonal phase of YVO(4). Additionally, the DMF/H(2)O volume ratio and the concentration of PVP both have obvious effects on the morphologies and sizes of the as-synthesized products. The sample prepared at 180 degrees C for 24 h with the DMF/H(2)O volume ratio of 3/1 and 0.4 g/L PVP concentration exhibits uniformly spherical shape with the diameter of 1-2 microm. Upon excitation by ultraviolet radiation or low-voltage electron beams excitation, the YVO(4):Ln(3+) (Ln=Eu, Dy, and Sm) samples show strong light emissions with different colors from the doped Ln(3+) ions. These phosphors exhibit potential applications in the fields of fluorescent lamps and light emitting diodes (LEDs).
采用简单的水热法，以 N,N-二甲基甲酰胺（DMF）为溶剂，聚乙烯吡咯烷酮（PVP）为保护剂，成功制备了具有均匀形貌的掺 Eu(3+)、Dy(3+)、Sm(3+)的稀土离子（Eu(3+), Dy(3+), Sm(3+))掺杂的 YVO(4) 微球。X 射线衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、光致发光（PL）光谱和动力学衰减被用来研究所得的相形成、颗粒形貌和发光性能。XRD 结果表明，所有掺杂的样品均具有高结晶度，可归因于 YVO(4)的纯四方相。此外，DMF/H(2)O 体积比和 PVP 浓度对合成产物的形貌和尺寸均有明显影响。在 180 摄氏度下反应 24 小时，DMF/H(2)O 体积比为 3/1，PVP 浓度为 0.4 g/L 的条件下，产物为均匀的球形，直径为 1-2 微米。在紫外光或低电压电子束激发下，YVO(4):Ln(3+)（Ln=Eu、Dy 和 Sm）样品表现出不同颜色的掺杂 Ln(3+)离子的强发光。这些荧光粉在荧光灯和发光二极管（LED）领域具有潜在的应用。
