白光LED荧光粉涂层结构及工艺的研究

发布时间：2018-01-10 12:25

本文关键词：白光LED荧光粉涂层结构及工艺的研究　出处：《电子科技大学》2014年硕士论文　论文类型：学位论文

【摘要】：作为新一代的固态照明光源,白光LED相比传统照明光源具有独特的优势。目前,白光LED的实现方式主要有三种,其中最主要的是:YAG:Ce3+黄色荧光粉+发出蓝光LED芯片,实现白光的输出。这种方法制备的白光LED有较高的转换效率,也适合大规模工业化生产。不同的荧光粉涂层的位置和几何结构,影响着白光LED的色度均匀性和发光效率,甚至决定了整个白光LED器件的性能,所以在白光LED制造过程中,荧光粉涂层工艺成为关键技术之一。然而传统类型的荧光粉涂层方式,由于缺乏对涂层的控制,所以导致荧光粉的分布不均匀,从而影响白光LED空间色度均匀性。为了解决上述问题,本论文改进了自适应荧光粉涂层技术——基于remote的自适应荧光粉涂层工艺,并提出了一种新型的电泳沉积荧光粉涂层工艺。采用基于remote的自适应荧光粉涂层技术,我们得到的荧光粉层厚度和LED发出的蓝光强度相匹配。通过测试,相比较传统荧光粉涂层方法,得到了出光均匀性好,发光效率较高的白光LED器件。通过这种方法有效提高了白光LED器件的整体性能。借鉴传统电泳技术,结合先进的理念,我们提出了新颖的电泳沉积荧光粉涂层工艺。该方法可以有效的控制白光LED荧光粉层形状、厚度,从而改善白光LED出光质量。通过多组对比实验,选出优化实验方案。其中涉及到的内容有以下几点:(1)晶圆级芯片荧光粉的电泳沉积工艺。(2)电泳过程工艺参数(时间、电压、和基板距离)对荧光粉涂层结构的影响。(3)研发了纳米ATO喷涂新工艺,实现了电泳基板的均匀导电性。(4)荧光粉电泳沉积层的后固化工艺。本文研发了两种荧光粉涂层新工艺,有效的改善了白光LED器件的出光质量。
[Abstract]:As a new generation of solid-state lighting source, compared with the traditional lighting white LED has unique advantages. At present, there are three main ways of white LED, of which the most important are: YAG:Ce3+ + yellow phosphor emits blue light LED chip output white light. The method for preparing the white LED with high conversion efficiency, is suitable for large-scale industrialized production. The position and geometrical structure of the phosphor coating different, affect the color of white LED uniformity and luminous efficiency, and even determines the performance of white LED devices, so in the white LED manufacturing process, fluorescent powder coating technology becomes one of the key technologies. However, the traditional type of fluorescent powder the coating methods, due to the lack of control of the coating, resulting in uneven distribution of fluorescent powder, thus affecting the white LED spatial color uniformity. In order to solve the above problem, this paper improves the To adapt to the phosphor coating technology -- Based on adaptive fluorescent powder coating process of remote, and puts forward the electrophoretic deposition of fluorescent powder coating process. A new adaptive phosphor coating technology based on remote, we obtain the LED phosphor layer thickness and a Lan Guangqiang match. Through the test, compared with the traditional fluorescent powder coating the method, light uniformity, high luminous efficiency of white LED devices. This method can effectively improve the overall performance of white LED devices. Using traditional electrophoresis technology, combined with the advanced idea, we propose a novel electrophoretic deposition of fluorescent powder coating process. The method can control the white LED phosphor layer shape. The effective thickness, so as to improve the quality of white LED light. Through the experiments, choose the optimized experimental program which involves the contents of the following: (1) wafer level The electrophoretic deposition process chip fluorescent powder. (2) the electrophoresis process process parameters (time, voltage, and substrate distance) influence on the coating structure of fluorescent powder. (3) developed a nano ATO coating process, realize uniform conductive substrate electrophoresis. (4) after the curing process of fluorescent powder electrophoretic deposition layer. This paper developed two new technology of phosphor coating, can effectively improve the quality of light white LED devices.

【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM923.34

【共引文献】