摘要：近年来，稀土发光材料经过研究已经有了许多种类，而且应用非常的广泛，比如照明，电子屏显示，X射线放射检测，高能粒子探测等领域都涉及到。钼酸盐作为一种发光材料，是因为本身拥有着优秀的物理特性和化学性能。并且，有着各种各样的合成方法。另外，它的操作选择性较大，可以说它作为荧光的基质材料是非常好的选择，而且如果在其中掺杂稀土离子，则会让其具有优秀的发光性和化学稳定性能。本论文的目的是制备选取CaRE2(MoO4)4:RE3+荧光粉（RE:Y、Tm、Sm、La、Gd、Eu、Dy、Tb），采取的表面活性剂为油酸，并采用水热法制备Eu3+、Dy3+、Tb3+单掺杂CaGd2(MoO4)4荧光粉的和不同基质的CaRE2(MoO4)4:Eu3+荧光粉（RE：Y、Tm、Sm、La、Gd）。本实验中对样品的结构、形貌和发光性能进行了分析。可以得出的结论如下：

 通过加入油酸的量不同，进而对CaGd2(MoO4)4的形貌调控，通过SEM的测试结果，观察得出的形貌图，来判断最合适的条件以取得最佳形貌（哑铃型），则得知条件为油酸=0.20g得出的形貌最好。

 单掺杂Eu3+、Tb3+、Dy3+样品的形貌没有改变。掺杂Eu3+会在613 nm处，发出红光。原因是5D0→7F2 跃迁，并且没有发生浓度猝灭现象。还有就是发光强度随着Eu3+浓度的增加而增强，Eu3+=0.05mmol时达到最大。

关键词： 发光；稀土离子掺杂；钼酸盐；油酸辅助水热法

Preparation of CaRE2(MoO4)4:RE3+phosphor by oleic acid assisted hydrothermal method

Abstract：In recent years, there have been many kinds of rare earth luminescent materials, and they have been widely used in the field of solid lighting, plate display, laser and biomarkers. The molybdate doped with rare earth ions can make it have good luminescence and chemical stability, and the molybdate matrix is a kind of luminescent material with excellent physical and chemical properties, and it can be synthesized by many different methods, and the selectivity is large, so it is used as a large amount of fluorescence. The matrix material.  The purpose of this paper is the preparation of selecting CaRE2(MoO4)4:RE3+ phosphor (RE: Y, Tm, Sm, La, Gd, Eu, Dy, Tb), using oleic acid as surfactant, the hydrothermal preparation of Eu3+、Dy3+、Tb3+ single doped CaGd2(MoO4)4 and different matrix of phosphor CaRE2(MoO4)4:Eu3+ phosphor (RE: Y, Tm, Sm, La, Gd) light-emitting materials.In this experiment, the structure, morphology and luminescent properties of the samples were analyzed. The following conclusions can be drawn:

 By adjusting the morphology of CaGd2(MoO4)4 by adding different amounts of oleic acid, observe the resulting topographies through SEM test results to determine the most suitable conditions for the best appearance (dumbbell type). ), then we know that the condition is best with the oleic acid = 0.20g.

 The morphology of single-doped Eu3+, Tb3+, and Dy3+ samples did not change. Doped Eu3+ has bright red light 5D0→7F2(613 nm). No concentration quenching occurs. The emission intensity increases with the increase of Eu3+ concentration and reaches the maximum at Eu3+=0.05 mmol.

Keywords： luminescence; rare earth ion doping; molybdate; oleic acid assisted hydrothermal method

目  录

1 绪论 1

1.2 发光的定义及特点 2

1.2.1 发光理论基础 2

1.2.2 固体发光 3

1.3