白光LED用钼酸盐红色荧光粉的制备及其发光性能研究

摘要：发光二极管（light emitting diode，简称 LED）具有寿命长，发光效率高，没有污染而且体积较小，响应迅速等优点，是二十一世纪既环保又节能的优质绿色光源。它的耗能仅仅只有荧光灯的 50%，白炽灯的 10%，且其应用前景也非常广泛，被称为“第四代照明光源”。目前白光 LED 实现的主要途径依靠是荧光粉转换。目前使用蓝光芯片激发黄色荧光粉的白光 LED 组合已实现商业化生产，但是由于缺少红光组分，导致其显色指数低，色温不理想，因此亟需研发高效的用于白光 LED 灯的红色荧光粉。66247

本论文采用高温固相法，制备 Ca8(1-x)(Al12O24)(MoO4)2: xEu3+体系的荧光粉。通过使用 X 射线衍射（XRD）、SEM、光致发光图谱、热稳定性测试等表征手段，对该种物质的物相结构，微观形貌以及发光性能进行了系统的研究和分析。主要研究方向有：对 Eu3+ 离子掺杂浓度进行调控优化，Ca8(1-x)(Al12O24)(MoO4)2: xEu3+红色荧光粉材料的红光发光强度会随掺杂浓度的增加而逐渐增强。当 x = 0.8 时发现 Ca8(1-x)(Al12O24)(MoO4)2: xEu3+红色荧光粉红光发光强度达到最大值，由此可知 Eu3+离子的最佳掺杂浓度。

（1）通过优化烧结时间，优化 Ca8(1-x)(Al12O24)(MoO4)2: xEu3+系列荧光粉的发光强度。

（2）通过控制球磨时间，优化 Ca8(1-x)(Al12O24)(MoO4)2: xEu3+系列荧光粉的发光强度。

（3）通过测试其荧光热稳定性及观察色坐标呢来分析样品的热稳定及色度学

（4）通过以上系列优化的 Ca8(1-x)(Al12O24)(MoO4)2: xEu3+体系的荧光粉具有在白光 LED

中应用的潜在价值。

毕业论文关键词：白光发光二极管；光致发光；钼酸盐红色荧光粉；Eu3+掺杂

Preparation and Luminescent Properties of Molybdenum Red Phosphor for White LED

Abstract： light emitting diode （ LED) is a type of illuminant which is durable, efficiently luminous, pollution free and small, respond rapid, it also was known as a green light source with both environmentally friendly and energy efficient features in the 21st century. Its energy consumption is only 50% of fluorescent lamps, 10% of incandescent, meanwhile, it was

known as the "fourth generation light” for its well prospect and widely use. The current white

LED to achieve the main way to rely on is the phosphor conversion. The use of Blu-ray chip to stimulate the yellow phosphor white LED combination has achieved commercial production, but because of the lack of red light components, resulting in its low color rendering index, color temperature is not ideal, so the urgent need for research and development of efficient white LED light red Phosphor.

In this paper, the phosphors of Ca8(1-x)(Al12O24)(MoO4)2: xEu3+ system were prepared by high temperature solid phase method. The phase structure, microstructure and luminescence properties of the material were systematically studied by X-ray diffraction (XRD), SEM, photoluminescence and thermal stability tests. The main research directions are: the control of Eu3+ ion doping concentration optimization, Ca8(1-x)(Al12O24)(MoO4)2: xEu3+ red phosphor material red light intensity will increase with the doping concentration gradually increased. When x = 0.8, the optimal doping concentration of Ca8(1-x)(Al12O24)(MoO4)2: xEu3+ red phosphor is the maximum, and the optimal doping concentration of Eu3+ ions is obtained.

(1) Optimize the luminescence intensity of Ca8(1-x)(Al12O24)(MoO4)2: xEu3+ series phosphor by optimizing the sintering time.

(2) The luminous intensity of Ca8(1-x)(Al12O24)(MoO4)2: xEu3+ series phosphor was optimized by controlling the milling time.

(3) 白光LED用钼酸盐红色荧光粉的制备及其发光性能研究:http://www.youerw.com/wuli/lunwen_74094.html