摘要：用高温熔融淬火的方法烧制掺杂同一系列不同浓度的三价稀土离子：Dy3+的铋锗酸盐玻璃。为了探究和分析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。同时的羟基分子含量,低的声子能量和高的跃迁能力使铋锗酸盐玻璃具有中红外发光的能力。本文介绍了Dy3+掺杂玻璃的荧光转换和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。57459

毕业论文关键词：中红外发光；铋锗酸盐玻璃；Dy3+掺杂

Spectral properties research of Dy3+ doped bismuth germanate glass

Abstract: Bismuth germinate glasses doped with a series of different concentrations of trivalent dysprosium ions were synthesized using melt-quenching method. In order to analyze absorption spectra in detail, the Judd-Ofelt theory is employed and the intensity parameters, transition probabilities have been carried out. As the LED fluorescent conversion material research its ultraviolet visible light band excitation and emission spectra.Meanwhile,the emission performance are studied under different concentration and different excitation wavelength .The low OH- molecule content,  low phonon energy and high transition probabilities entirely favor the mid-infrared emission in bismuth glass. This paper introduces the fluorescence conversion and the characteristic of mid-infrared emission of Dy3+ doped bismuth gernamate glass. According to the advantageous spectroscopic characteristics reveal that Dy3+ doped bismuth gernamate glass is a potential cost effective host for the mid-infrared field and the LED fluorescent conversion material.

Keywords: mid-infrared emission; Bismuth germanate glass; Dy3+ doping 

目  录

1. 引言 1

1.1 稀土玻璃的光谱能级 1

1.1.1 稀土离子的光谱能级跃迁理论 1

1.2.1 Dy3+掺杂铋硼酸盐玻璃 2

1.2.2 Dy3+掺杂硼磷酸盐玻璃 3

1.2.3 Dy3+掺杂硅酸盐玻璃 4

1.2.4 Dy3+掺杂氟氧化物玻璃 4

1.3 中红外发光 5

1.3.1 铒掺杂ZBYA玻璃 6

1.3.2 铒镨双掺氟磷酸盐玻璃 7

1.3.3 Er3+/Ho3+离子共掺氧氟碲酸盐玻璃 9

1.3.4 镝离子单掺及镝铥离子共掺碲酸盐玻璃 10

2. 实验 13

2.1 实验原料 13

2.2 样品制备 13

2.2.1制备流程 13

2.3 试样表征 14

2.3.1 密度测试 14

2.3.2 折射率 14

2.3.3 光谱性质测试 14

2.4 光谱理论 14

2.4.1 Judd-Ofelt理论 14

2.4.2 Fuchtbauer-Ladenburg理论 16

3. 结果与讨论 17

3.1 吸收光谱及Judd-Ofelt理论参数 17

3.2 傅里叶变换红外透射光谱