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摘要：近年来，新型固态LED（发光二极管）照明显示出了许多现有光源无法比拟的优势，很有可能取代现有光源成为下一代照明光源，即第四代光源。新型LED技术主要包括芯片和荧光粉两个方面，而荧光粉作为其关键技术已引起了广泛的重视和大量的研究。本文主要通过介绍固体发光材料的特点和应用，重点阐述了荧光粉的发光特性及稀土离子参杂单一基质的白光发射荧光粉的发光机理。总结了单一基质荧光粉发白光方法相对于多基质荧光粉组合实现白光的优缺点。在此基础上对于不同种类荧光粉在发光过程中的不足之处给予分析，对新型LED光源的发展做了一个初步预测。54702
毕业论文关键词：LED，荧光粉，单一基质，发光性质
Abstract: Nowadays, the invention of LED (light-emit diode) gives another revolution on the illumination to replace conventional incandescent or fluorescence lamps, because of merits of being environmentally friendly and exhibiting energy savings high brightness etc. Undoubtedly it will replace the exiting lighting source as the next generation light source. The main technologies are chips and phosphors, which had aroused wide attention around the world. The article mainly introduces about the characters and applications of phosphors the principle of white-light-emitting-single-based phosphors rare earth ion doped, and the merits and drawbacks between single-based material and multi-based luminescent materials. Based on the part mentioned above the article will make a detailed analysis on the inadequacy of different phosphors showed in their lighting process. The last part mainly discuss the possible future development of the new LED source.
Key words: LED, phosphor, single-based material, luminescence properties
目录
1 前言 4
1.1新型LED的特点 4
1.2新型LED的应用 4
1.2.1照明领域. 4
1.2.2汽车和信号灯领域. 4
1.2.3景观灯领域 5
1.2.4 其他领域 5
1.3白光LED的实现方式 5
1.4荧光粉 5
1.4.1荧光粉的发光机理 5
1.4.2荧光粉材料类型 6
1.4.3近紫外激发三基色荧光粉 6
1.4.4单一基质荧光粉的研究进展 7
2实验部分 7
2.1主要实验仪器 7
2.2 固相法介绍 8
2.2.1 固相法概述 8
2.2.2 固相法的优缺点 8
2.3实验过程 8
2.4 样品的测试 9
2.4.1 X射线粉末衍射(XRD) 9
2.4.2 荧光性能测试 9
3 实验结果及讨论 9
3.1荧光粉组成及其发光过程 9
3.2单一基质白光发射荧光粉的发光机理 10
3.3 本论文工作的实验结果 13
结 论 15
参考文献 16
致 谢 18