La2(MoO4)3:Eu3+纳米红色荧光粉的合成及发光特性

Synthesis and Luminescent Properties of Nanocrystalline La2(MoO4)3:Eu3

摘要:

以硬脂酸镧和硬脂酸铕为反应物，采用溶剂热法合成了Eu3+离子掺杂的La2(MoO4)3:Eu3+纳米红色荧光粉。利用TEM、 XRD、FL对其形貌、结构和发光性能进行了表征。研究了溶剂种类、反应时间、反应温度、Eu3+掺杂浓度对产物微观形貌和发光性能的影响。结果表明：以异丙醇为溶剂，反应温度180℃、反应时间12h，得到的样品结晶度高、分散性好、形貌均一，粒径小于100nm。该样品可被近紫外光(391nm)和蓝光(462.5 nm)有效激发，最大发射波长位于613.5 nm，为窄带的红光。La2(MoO4)3:Eu3+的发光强度与Eu3 +离子掺杂浓度有关，其最佳掺杂浓度为15%（摩尔分数）。

Abstract:

The red nano-phosphors, La2(MoO4)3:Eu3+, were synthesized by solvothermal method using lanthanum and europium stearate as starting materials. X-ray diffraction (XRD), transmission electron microscopy (TEM) and fluorescence spectroscopy were employed to characterize the obtained products. The effects of solvent, reaction time, reaction temperature and Eu3+ ions dopant concentration on the morphology and luminescence properties of La2(MoO4)3:Eu3+ were investigated. The results indicate that the tetragonal La2(MoO4)3 :Eu3+ with an average size of less than 100nm were synthesized at 180 ℃ for 12h using isopropyl alcohol as the solvent. The obtained La2(MoO4)3 :Eu3+ can be excited with near-UV 395 nm and blue (462.5 nm) light and exhibit the characteristic red emission of Eu3+ at about 613.5 nm, and the optimal doping concentration is 15 mol %.