Eu3+离子掺杂的复合基团白光LED红色荧光粉的制备及发光性能研究

摘要：白色发光二极管（LED）因具有寿命长、能耗低、体积小、环保等优点而受到广泛关注。目前蓝光芯片YAG:Ce3+实现白光发射的LED已经被商业化，然而，这种组合却缺少红色荧光粉组分，导致其色温高，显示指数低。因此研发一种高稳定、高效率性能的红色荧光粉迫在眉睫。通过高温固相反应合成法，制备了Eu3+离子掺杂的Ca11(SiO4)4(BO3)2:xEu3+荧光粉。并通过X射线衍射（XRD）、、扫描电子显微镜（SEM）、荧光光谱（PL/PLE）及其热稳定性测试、量子效率附件等表征手段。对其物相结构、微观形貌及其发光性能进行了研究。通过Eu3+离子掺杂浓度，荧光粉煅烧时间，煅烧温度和荧光粉尺寸等条件的优化，调控复合基团Ca11(SiO4)4(BO3)2荧光粉的发光强度。实验结果表明在Ca11(SiO4)4(BO3)2基质中，Eu3+离子的掺杂摩尔浓度是0。07，烧结时间为20h,烧结温度为1250℃时制备出最佳发光强度的荧光粉。75023

毕业论文关键词：复合基团；红色荧光粉；白光发光二极管；Eu3+离子掺杂；光致发光

Preparation and Luminescent Properties of Eu3+ Ion Doped Composite Group White LED Red Phosphor

Abstract：White light-emitting diode (LED) because of long life, low energy consumption, small size, environmental protection and other advantages of widespread concern。 At present, Blu-ray chip YAG:Ce3+ white light emitting LED has been commercialized, however, this combination is the lack of red phosphor components, resulting in its high color temperature, low display index。 So the development of a highly stable, high-performance performance of the red phosphor is imminent。 Eu3+ ion-doped Ca11(SiO4)4(BO3)2:xEu3+ phosphor was prepared by high temperature solid-state reaction synthesis。 And characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), fluorescence spectroscopy (PL/PLE), thermal stability test and quantum efficiency attachment。 The phase structure, microstructure and luminescence properties of the phase were studied。 The luminescence intensity of Ca11(SiO4)4(BO3)2 phosphor was controlled by the optimization of Eu3+ ion doping concentration, phosphor calcination time, calcination temperature and phosphor size。 The experimental results show that the molar concentration of Eu3+ ions is 0。07, the sintering time is 20h and the sintering temperature is 1250℃, and the best luminescence intensity is obtained in Ca11 (SiO4) 4(BO3)2 matrix。

Keywords: Composite group; red phosphor; white light emitting diode; Eu3+ ion doping; photoluminescence

1 绪论 1

1。1 引言 1

1。2 荧光粉简介 1

1。2。1白光LED的研究历史 1

1。2。2红色荧光粉的发展现状 2

1。3 荧光粉的制备方法 2

1。3。1高温固相法 2

1。3。2微波热合成法 3

1。3。3 燃烧法 3

1。3。4 水热合成法 3

1。3。5 共沉淀法 4

1。3。6 溶胶凝胶法 4

1。3。7 喷雾热分解法 4

1。4 复合基团荧光粉的发光机理 4

1。5 Eu3+离子发光特性 5

1。6 课题的主要内容 6

1。6。1 课题研究的目的和意义 6

1。6。2 课题研究内容 Eu3+离子掺杂的复合基团白光LED红色荧光粉的制备及发光性能研究:http://www.youerw.com/cailiao/lunwen_85822.html