摘要:本实验运用高温熔融淬火的方法烧制掺杂两种不同浓度的三价稀土离子：Dy3+和Tm3+共同掺杂铋锗酸盐玻璃。为了探究和分析Tm3+Dy3+掺杂铋锗酸盐玻璃的吸收光谱，运用Judd-Ofelt理论。作为LED荧光转换材料调研了其紫外可见光波段的激发和发射光谱，并研究了不同浓度和不同激发波长下的发射性能。同时羟基的分子含量,低的声子能量和高的跃迁能力使得铋锗酸盐玻璃具有中红外发光的能力。本文介绍了Tm3+、Dy3+掺杂玻璃的可见光性质Tm3+Dy3+掺杂铋锗酸盐玻璃的中红外发光的性质特点。根据光谱图分析了掺杂Tm3+Dy3+的铋锗酸盐玻璃的能量传递机制，表明该样品在LED荧光转换和中红外发光领域有着潜在的应用。70091
毕业论文关键词：中红外发光；铋锗酸盐玻璃；Tm3+Dy3+共掺；
Mid Infrared Properties of Dy and TM Codoped Bismuth Doped Glasses
Abstract: Bismuth germinate glasses doped with a series of different concentrations of trivalent dysprosium and Tm ions were synthesized using melt-quenching method. In order to analyze absorption spectra in detail, the Judd-Ofelt theory is employed .As an LED fluorescence conversion material, the excitation and emission spectra of the ultraviolet visible band were investigated and the emission properties under different concentrations and different excitation wavelengths were investigated. At the same time, the molecular content of hydroxyl, low phonon energy and high transition ability make bismuth germanate glass have the ability of mid infrared luminescence. In this paper, the visible light properties of Tm3+ and Dy3+ doped glasses and the properties of mid infrared luminescence of Tm3+Dy3+ doped bismuth germanate glasses are introduced. The energy transfer mechanism of bismuth doped germanate glasses doped with Tm3+Dy3+ was analyzed according to the spectrogram. The results show that the sample has potential applications in the field of LED fluorescence conversion and mid infrared luminescence.
KeyWords:mid-infrared emission; Bismuth germanate glass; Tm3+Dy3+ doping;
目 录
1.引言 1
1.1稀土玻璃的光谱能级理论 1
1.2 Tm3+Dy3+共掺荧光玻璃的光谱性质研究 2
1.2.1可见光波段发光研究 2
1.2.2中红外发光性质的研究 5
1.3本课题的选题背景和意义 8
2.实验方法和理论基础 10
2.1实验原料 10
2.3物化性质测试 10
2.3.1 密度测试 10
2.3.2折射率 11
2.4光谱性质测试 11
2.4.1吸收光谱 11
2.4.2荧光光谱 11
3 结果与讨论 12
3.1可见光发光性质研究 12
3.1.1激发光谱 12
3.1.2发射光谱 12
3.1.3色度坐标 14
3.2红外光谱性质研究 15
3.2.1吸收光谱 15
3.2.2 DSC差热分析 16
3.2.3 红外透过光谱 17
3.2.4 Raman光谱 17
3.2.5近红外发光光谱 Dy/Tm掺铋酸盐玻璃的中红外性质研究:http://www.youerw.com/cailiao/lunwen_79230.html