中文摘要：

采用高温固相法制备了Ln（Ln=Y／Gd）VO4掺Er^3＋或Nd^3＋的近红外发光材料。通过X射线粉末衍射（XRD）和光致发光（PL）对样品进行了表征。结果表明：所得产品结晶良好，属于四方晶系，锆石结构。研究了Er^3＋，Nd^3＋的含量、煅烧时间、煅烧温度等对材料近红外发光性质的影响。在Ln（Ln=Y／Gd）VO4：Er^3＋／Nd^3＋中，存在明显的从VO4^3-向Er^3＋／Nd^3＋的能量传递。两种不同的LnVO4（Ln=Y／Gd）基质对发光性质也有一定的影响。小浓度Bi^3＋的掺人可以明显提高YVO4：Er^3＋／Nd^3＋的近红外发光强度。

英文摘要：

Ln（Ln = Y, Gd）VO4： Er^3＋/Nd^3＋ were prepared by solid state reaction and characterized by X- ray diffraction （XRD） and photoluminescence spectroscopy （PL）. The material has zircon type structure with a tetragonal unit cell. The effects of sintering temperature, sintering time and the effects of Er^3＋/Nd^3＋ -doped concentration on the near-infrared luminescence of the samples were investigated. Energy transfer from VO^3- to Er^3＋/Nd^3＋ was found. The effects of different Ln^3 ＋ matrix and doping of Bi^3＋ on the energy transfer efficiency was also discussed.