安徽工业大学
本科毕业设计（论文）
专 业 班 级 姓 名 学 号 指导教师
二0一三年六月
I
安徽工业大学 光信息科学与技术专业本科毕业设计(论文)
安徽工业大学
本科毕业设计(论文)任务书
新型半导体白光LED照明用荧光材料的制
课题名称
备及性能研究
学 院 专业班级 姓 名 学 号
毕业设计(论文)的主要内容及要求：
主要内容：白光LED被广泛应用于通用照明和背光源等领域。目前，对白
光 LED 荧光材料的研究几乎都集中在荧光粉上。然而，由于荧光粉自身性能的局限性，已不能满足现有白光LED的需求及适应未来白光LED的发展趋势。本论文提出一种不同的LED制备技术路线，使得白光LED性能得到提高，优点明显。形成一种新型的白光LED发光结构，实现无荧光粉体结构的LED白光发射
要求：1.具有查阅相关文献的能力；
2.学会光谱分析的相关知识。
指导教师签字：
II
安徽工业大学 光信息科学与技术专业本科毕业设计(论文)
新型半导体白光LED照明用荧光材料的
制备及性能研究
摘要
随着能源的过量消耗和环境的日益恶化，节约能源和保护环境必将受到越来越多的重视。白光LED作为第四代照明光源，因具备良好的节能环保特点以及其它一系列的优点而被全世界所关注，各国都在竞相研究开发。而在白光 LED 的制备中，荧光材料的性能直接影响白光 LED 的转换效率、光效、色温、色坐标及显色性。白光LED荧光材料主要以无定形荧光粉为主体，现阶段，国内外公司及研究机构对白光 LED 荧光材料的研究几乎都集中在荧光粉上，开展高亮度、高发光效率、高显色性荧光粉已经成为白光LED领域荧光材料的研究热点。然而，受荧光粉自身性能的影响，目前白光LED发光效率提高、显色性能改进、寿命提高、大功率使用等问题的解决速度却日趋渐缓。LED发展的瓶颈日益凸显出荧光粉不能满足现有白光LED需求及适应未来白光LED发展趋势的问题。本课题提出一种新型Ce:YAG晶片发光结构白光LED制备技术路线，其具有激发发射效率高,物化性能稳定、热导率高，寿命长、可应用于高功率白光LED,可实现增加红色发光成分和调谐发光波段,优化白光封装LED结构等优点。利用LED芯片产生的蓝色发光有效激发Ce:YAG晶片，形成一种新型的白光LED发光结构。实现无荧光粉体结构的LED白光发射。从而可以有效解决目前Ce:YAG荧光粉发光结构白光LED存在的荧光粉激发效率低，色彩一致性差，光衰大，寿命短等一系列的缺点。
关健词：白光LED Gd,Ce:YAG 荧光材料 光学性能
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安徽工业大学 光信息科学与技术专业本科毕业设计(论文)
White LED with fluorescent material preparation and optical properties of
the research
ABSTRACT
With the excessive consumption of energy and deteriorating environment,to save energy and protect the environment will be more and more attention.White LED as the fourth generation of lighting source, because of the good characteristics of energy conservation and environmental protection, and other a series of advantages and attention by all over the world, countries are racing to the research and development.In the preparation of white LED, fluorescent material performance directly affects the conversion efficiency of white LED, luminous efficacy, color temperature, color coordinate and color rendering.White LED fluorescent material mainly amorphous phosphor powder as the main body, at this stage, companies and research institutions at home and abroad studies of white light LED fluorescent material on almost all concentrated in the fluorescent powder, high brightness, high luminous efficiency, high color rendering fluorescent powder has become a research focus in the field of white LED fluorescent materials.Affected by phosphor performance itself, however, the white LED luminous efficiency and color rendering performance improvements, improve the service life, solving the problems of the high power use speed is slowing. LED the development of the bottleneck is increasingly highlighted the phosphors can't meet the demand of the existing white LED and adapt to the future development trend of white LED.This topic puts forward a new type of Ce: YAG white LED light-emitting chip structure preparation technology route, its excitation emission efficiency is high, physical and chemical performance is stable, high thermal conductivity, long service life, can be applied to high power white LED, can increase the red light-emitting component implementation and tuning luminescence bands, optimize the structure of the white light LED encapsulation, etc.Use a blue glow LED chip effective excitation Ce: YAG wafer, forming a new kind of white LED light emitting
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安徽工业大学 光信息科学与技术专业本科毕业设计(论文)
structure.Realize the structure without fluorescent powder LED white light emission. In order to effectively solve the current Ce: YAG phosphor white LED light-emitting structure exist phosphor excitation efficiency is low, poor color consistency, light failure, life is short and so on a series of shortcomings.
KEYWORDS：white LED，Gd,Ce:YAG ，fluorescent material ，optical property
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