畢業論文

打賞
當前位置: 畢業論文 > 材料科學 >

銪摻雜鍺酸鉍紅光LED材料的制備與發光性能

時間:2019-06-09 14:17來源:畢業論文
采用高溫固相法,用鍺酸鉍為基質材料,摻雜稀土 Eu3+來制備紅色熒光粉(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)

摘要白色發光二極管(White light-emitting diodes,簡稱 LED),具有耗電量低、使用壽命長、高亮度、低熱量等很多的優點,在 21世紀可持續反戰的背景下,節約能源和保護環境的LED燈將會有更加廣闊的應用空間。而熒光粉是白色 LED燈的主要材料之一。不過現在所用的白色 LED 燈用的紅色熒光粉的發光效率還不夠理想,所以需要制備發光效率更加好的紅色熒光粉。   本文采用高溫固相法,用鍺酸鉍為基質材料,摻雜稀土 Eu3+來制備紅色熒光粉(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+時,Eu3+離子取代了 Bi3+離子。   本實驗分析摻雜不同濃度的 Eu3+對于樣品的發光性能的影響,對于樣品進行 X 射線衍射,紫外可見熒光測試等檢測。結果表明,摻雜 8%Eu3+的鍺酸鉍發光性能最好。 Bi12GeO20:Eu3+、Ti4+,摻雜Ti 4+為7%時發光性能最好。  36093
畢業論文關鍵詞:鍺酸鉍;Eu3+;稀土發光 
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. 源¥自%六:維;論-文'網=www.aftnzs.live
Keywords: BGO;Eu3 +;rare earth luminescent    
目錄
第一章 緒論    4
1.1 稀土發光材料概述    4
1.2 發光機理  ..  4
1.3 Eu3+
,最常見的紅色發光體  ..  5
1.3.1 排放性能    5
1.3.2 吸收機制    6
1.4 LED燈的發展歷史  .  7
1.5 熒光材料在LED 中的應用    8
1.6 立題依據及意義  ..  9
1.6.1 立題依據及意義    9
1.6.2 研究任務  ..  10
第二章 實驗過程  .  11
2.1 固相反應機理    11
2.2原料及實驗設備  ..  11
2.2.1原料    11
2.2.2儀器設備  ..  12
2.3.1 (EuxBi1-x)4Ge3O12(x=0.01,0.02,0.05,0.08,0.1)的制備  .  12
2.3.2 (Bi0.92Eu0.08)12(Ge1-xTix)O20(x=0.03,0.05,0.07,0.1)的制備  .  12
2.4 性能測試  .  12
2.4.1 X射線衍射儀  .  12
2.4.2熒光光譜儀    13
第三章  實驗結果與討論   16
3.1 Bi4Ge3O12:Eu3+測試結果  .  16
3.1.1   Bi4Ge3O12:Eu3+ XRD圖譜 .  16
3.1.2 Bi4Ge3O12:Eu3+的激發和發射光譜  ..  16
3.1.3 Eu3+摻雜濃度對Bi4Ge3O12:Eu3+
發光性能的影響  .  18
3.2 Bi12GeO20:Eu3+、Ti4+測試結果    20 銪摻雜鍺酸鉍紅光LED材料的制備與發光性能:http://www.aftnzs.live/cailiao/20190609/34422.html
------分隔線----------------------------
推薦內容
双色球走势图带连线