铕掺杂锗酸铋红光LED材料的制备与发光性能

摘要白色发光二极管（White light-emitting diodes，简称 LED），具有耗电量低、使用寿命长、高亮度、低热量等很多的优点，在 21世纪可持续反战的背景下，节约能源和保护环境的LED灯将会有更加广阔的应用空间。而荧光粉是白色 LED灯的主要材料之一。不过现在所用的白色 LED 灯用的红色荧光粉的发光效率还不够理想，所以需要制备发光效率更加好的红色荧光粉。   本文采用高温固相法，用锗酸铋为基质材料，掺杂稀土 Eu3+来制备红色荧光粉(EuxBi1-x)4Ge3O12(x=0.01, 0.02, 0.05, 0.08, 0.1)和(Bi0.92Eu0.08)12(Ge1-xTix)O20(x=0.03, 0.05, 0.07, 0.1)。在合成Bi4Ge3O12:Eu3+时，Eu3+离子取代了 Bi3+离子。   本实验分析掺杂不同浓度的 Eu3+对于样品的发光性能的影响，对于样品进行 X 射线衍射，紫外可见荧光测试等检测。结果表明，掺杂 8%Eu3+的锗酸铋发光性能最好。 Bi12GeO20：Eu3+、Ti4+,掺杂Ti 4+为7%时发光性能最好。 36093
毕业论文关键词：锗酸铋；Eu3+；稀土发光
Abstract White LED (White light-emitting diodes, called LED), have low power consumption, many of the advantages of long life, high brightness, low heat, etc., in the 21st century, sustainable anti-war background, save energy and protect the environment The LED lights will have a more broad application space. The phosphor is the main material of white LED lights. But now luminous efficiency white LED lamp with a red phosphor used is not ideal, it is necessary to prepare the luminous efficiency of more good red phosphor.   In this paper, high-temperature solid-phase method, with BGO matrix material, prepared rare earth doped Eu3+ red phosphor (EuxBi1-x) 4Ge3O12 (x = 0.01, 0.02, 0.05, 0.08, 0.1) and (Bi0.92Eu0.08 ) 12 (Ge1-xTix) O20 (x = 0.03, 0.05, 0.07 , 0.1). In the synthesis Bi4Ge3O12: when   Eu3 +, Eu3 + ions replace the Bi3 + ions.   The experimental analysis of Eu3+ doped with different concentrations of the light-emitting properties of the samples for the effect, for the samples by X-ray diffraction, UV-visible fluorescence testing and other testing. The results show that doping 8% Eu3+ luminescenceproperties BGO best. Bi12GeO20: Eu3+, Ti4+, doping Ti4+ 7% luminous performance as the best.
Keywords: BGO；Eu3 +；rare earth luminescent
目录
第一章绪论    4
1.1 稀土发光材料概述    4
1.2 发光机理 .. 4
1.3 Eu3+
，最常见的红色发光体 .. 5
1.3.1 排放性能    5
1.3.2 吸收机制    6
1.4 LED灯的发展历史 . 7
1.5 荧光材料在LED 中的应用    8
1.6 立题依据及意义 .. 9
1.6.1 立题依据及意义    9
1.6.2 研究任务 .. 10
第二章实验过程 . 11
2.1 固相反应机理    11
2.2原料及实验设备 .. 11
2.2.1原料    11
2.2.2仪器设备 .. 12
2.3.1 (EuxBi1-x)4Ge3O12（x=0.01，0.02，0.05，0.08，0.1）的制备 . 12
2.3.2 (Bi0.92Eu0.08)12（Ge1-xTix）O20(x=0.03,0.05,0.07,0.1)的制备 . 12
2.4 性能测试 . 12
2.4.1 X射线衍射仪 . 12
2.4.2荧光光谱仪    13
第三章实验结果与讨论   16
3．1 Bi4Ge3O12：Eu3+测试结果 . 16
3．1．1   Bi4Ge3O12：Eu3+ XRD图谱 . 16
3．1．2 Bi4Ge3O12：Eu3+的激发和发射光谱 .. 16
3.1.3 Eu3+掺杂浓度对Bi4Ge3O12：Eu3+
发光性能的影响 . 18
3.2 Bi12GeO20：Eu3+、Ti4+测试结果    20 铕掺杂锗酸铋红光LED材料的制备与发光性能:http://www.youerw.com/cailiao/lunwen_34422.html