毕业论文--新型半导体白光LED照明用荧光材料的制备及能研究.docVIP

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 安徽工业大学 本科毕业设计(论文)任务书 课题名称 新型半导体白光LED照明用荧光材料的制备及性能研究 新型半导体白光LED照明用荧光材料的制备及性能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 cant 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