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铕掺杂锗酸铋红光LED材料的制备与发光性能

时间:2019-06-09 14:17来源:毕业论文
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)

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
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