采用甘氨酸作为燃料, 制备了单斜相Gd2O3∶Bi3+,Nd3+纳米发光材料。使用X射线粉末衍射仪和TEM对样品的结构和形貌进行了表征, 并研究了制备条件对样品的可见及近红外激发和发射光谱、发光强度、荧光寿命等的影响。结果表明, 体系中存在高效的Bi3+→Nd3+能量传递过程, 当Bi3+和Nd3+的掺杂摩尔分数分别为6%和2%时, 单斜相Gd2O3∶Bi3+,Nd3+荧光粉可以获得最强的近红外光发射。与单掺Nd3+的样品相比, 单斜相Gd2O3中掺杂Bi3+和Nd3+后, 样品的近红外发光增强近20倍。

Monoclinic Gd2O3∶Bi3+,Nd3+ phosphors were prepared by combustion method using glycine as a fuel. The structure of the phosphor was characterized by X-ray diffraction and TEM. The influences of Bi3+/Nd3+ concentration on the spectrum shape, fluorescence intensity and fluorescence lifetimes were investigated. The results show that there is an efficient energy transfer from Bi3+ to Nd3+ ions in Gd2O3∶Bi3+,Nd3+. With optimized Bi3+ mole fraction of 6% and Nd3+ mole fraction of 2%, the monoclinic Gd2O3∶Bi3+,Nd3+ phosphor has the strongest near-infrared luminescence intensity, which is about 20 times stronger than the sample without Bi3+ doping .