稀土掺杂氟化物单晶体的光谱性能及其应用研究

发布时间：2018-08-07 17:37

【摘要】：稀土离子由于电子层结构十分独特,能级众多,从而成为一种理想的发光材料组合成分之一。这类发光材料的光学性能十分优异,具备了强大的实际应用潜力。氟化物基质的物理化学特性十分稳定,且声子能量较低,是理想的发光材料基质。稀土离子掺杂氟化物是目前比较常用的制作稀土发光材料的方案,比之以前的使用非氟化物基质的性能要优越。本文中所选择的实验方案就是在氟化物基质中掺入稀土离子。本实验室通过通过改进后的布里奇曼法,也就是我们在后面提到的坩埚下降法成功制备出了稀土离子掺杂氟化物的单晶体。之后会将样品加工成一个厚度在2mm左右的薄片,分别测量了这些薄片样品的XRD衍射光谱、吸收光谱、激发光谱、发射光谱等,通过这些数据去分析晶体样品的光学性能,并介绍其光学性能适合的一些实际应用。论文的第一章中介绍了稀土发光材料的一些基本概念。对稀土发光材料有了一些基本认识。接着列出了稀土发光材料在一些领域中的实际应用。后面详细介绍了稀土发光材料分别在固体紫外激光器和固体白光LED方面的应用。论文的第二章主要介绍的是实验过程,还有所使用的一些理论基础知识和仪器。其中理论知识包括了XRD衍射光谱、吸收光谱、发射光谱和荧光分析法,通过这些理论分析了样品的光学特性。论文的第三章到第五章主要是介绍了几种具体的实验成果:Ce3+掺杂α-Na YF4单晶体、Dy3+/Eu3+共掺α-Na YF4单晶体和Eu3+掺杂α-Na YF4单晶体。文章中介绍了制备用于实验样品的化学成分的摩尔比,以及详细的晶体生长过程,通过测量样品的一些表征参数,来分析样品的光学性能。通过了解它们的光学特性来判断它们可以在一些领域的价值。文章的最后总结出了稀土离子掺杂氟化物的优点,总结了实验样品的实际应用的潜力。同时提出了实验中出现的不足之处,并对未来的发展进行了展望。
[Abstract]:Rare earth ions have become one of the ideal composition of luminescent materials due to their unique structure and numerous energy levels. The optical properties of this kind of luminescent materials are very excellent and have strong practical application potential. The physical and chemical properties of fluoride matrix are very stable, and the phonon energy is low, so it is an ideal luminescent material matrix. Rare earth ion doped fluoride is a commonly used scheme to fabricate rare earth luminescent materials, which is superior to the previous non fluoride matrix. The experimental scheme chosen in this paper is to add rare earth ions into fluoride matrix. In our laboratory, rare earth ion doped fluorides were successfully prepared by the improved Bridgman method, that is, the crucible descent method. The samples will then be processed into a thin slice with a thickness of about 2mm. The XRD diffraction spectra, absorption spectra, excitation spectra, emission spectra, etc., of these thin samples will be measured, and the optical properties of the crystal samples will be analyzed through these data. Some practical applications suitable for its optical properties are also introduced. In the first chapter, some basic concepts of rare earth luminescent materials are introduced. Some basic knowledge of rare earth luminescent materials has been obtained. Then the practical applications of rare earth luminescent materials in some fields are listed. The applications of rare earth luminescent materials in solid state UV lasers and solid white LED are described in detail. The second chapter mainly introduces the experimental process and some basic theoretical knowledge and instruments used. The theoretical knowledge includes XRD diffraction spectrum, absorption spectrum, emission spectrum and fluorescence analysis, through which the optical properties of the samples are analyzed. In the third to fifth chapters, several specific experimental results are introduced, such as: ce _ 3 doped 伪 -Na YF4 single crystal and Eu3 doped 伪 -Na YF4 single crystal. In this paper, the molar ratio of the chemical components prepared for the experimental samples and the detailed crystal growth process are introduced. The optical properties of the samples are analyzed by measuring some characterization parameters of the samples. They can be valued in some fields by understanding their optical properties. Finally, the advantages of rare earth ion doped fluorides are summarized, and the practical application potential of experimental samples is summarized. At the same time, the shortcomings of the experiment are put forward, and the future development is prospected.
【学位授予单位】：宁波大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：O734;TN312.8

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