臺灣博碩士論文加值系統

本研究是以溶膠-凝膠法製備堇青石 (Cordierite，Mg2Al4Si5O18) 螢光粉
體，並探討摻雜活化劑及不同水解過程對其晶體結構、微結構及發光特性
之影響。
Mg2Al4Si5O18:Ce;Eu 螢光粉體經900oC 熱處理後開始形成μ- cordierite
結晶，退火至1300oC 後為α- cordierite 結構。於水解過程中添加適量電解
質可細化晶粒及顆粒，且有助於活化劑均勻分散於主體中。
Mg2Al4Si5O18:Ce 粉末，經波長316 nm 激發後於420 nm 呈放射波峰主
要來自於電子在Ce3+離子之2D3/2 → 2F5/2 能階之躍遷所致。Mg2Al4Si5O18: Eu
粉末，經波長393 nm 激發後放射波峰為616 nm，此與電子在Eu3+離子之
5D0 → 7F2 能階之躍遷有關。發光特性與電解質濃度及活化劑種類與濃度有
關。

In this study, cordierite phosphors have been synthesized by the sol-gel
route. Effects of the different hydrolysis processes and doping activators on the
crystal structure, microstructure, and luminescence were investigated.
Mg2Al4Si5O18:Ce;Eu phosphors started to crystallize into μ- cordierite
phase after heating at 900oC , and α- cordierite were obtained at 1300oC. Adding
electrolyte during hydrolysis processes could decrease the size of grain and
particle, and enhance the uniform distribution of activators. When the
Mg2Al4Si5O18:Ce phosphor excited at 316 nm, the emission peak was observed
at 420 nm, due to the 2D3/2 → 2F5/2
transition of Ce3+ ions. The
Mg2Al4Si5O18:Eu had a sharp emission peak at 616 nm under excitation at 393
nm, originating from the 5D0 → 7F2
transition of Eu3+ ions. The luminescence
properties were dependent on the electrolyte content, activator species and
concentration.

摘要 ................................................................................................................. i
Abstract .......................................................................................................... ii
致謝 ............................................................................................................... iii
目錄 ............................................................................................................... iv
表目錄 .......................................................................................................... vii
圖目錄 ......................................................................................................... viii
第一章 緒論 .................................................................................................. 1
1.1 前言 ...................................................................................................... 1
1.2 研究動機 .............................................................................................. 3
第二章理論基礎與文獻回顧 ......................................................................... 5
2.1 堇青石結簡介 ....................................................................................... 5
2.1.1 堇青石之晶體結構 ............................................................... 5
2.2 溶膠-凝膠法 ....................................................................................... 12
2.2.1 溶膠-凝膠法簡介 ............................................................... 12
2.2. 2 溶膠-凝膠法原理 .............................................................. 12
2.2.2 影響溶膠-凝膠製程之因素 ................................................ 13
2.3 發光原理 ............................................................................................ 16
2.4 發光種類與應用 ................................................................................ 16
2.5 發光機制 ............................................................................................. 17
2.7 發光中心 ............................................................................................. 19
2.8 斯托克位移 ......................................................................................... 20
2.6 發光材料之組成 ................................................................................ 22
2.7 影響發光效率因素 ............................................................................. 24
2.8 色彩簡介 ............................................................................................. 27
2.9 研究目的 ............................................................................................. 28
第三章 實驗方法與步驟 ............................................................................. 29
3.1 實驗流程 ............................................................................................ 29
3.2 分析儀器與原理介紹 ........................................................................ 32
3.2. 1 X 光繞射分析儀 (X-ray diffraction, XRD) ....................... 32
3.2.2 熱重分析/熱差掃描量熱分析 (TGA/DSC) ...................... 32
3.2.3 傅立葉紅外線轉換光譜 (FT-IR) .................................... 32
3.2.4 X 光光電子能譜 (XPS) ..................................................... 32
3.2.5 掃描式電子顯微鏡 ( Scanning Electron Microscopy, SEM)
..................................................................................................... 33
3.2.6 場發射穿透式電子顯微鏡 (FE-TEM) ............................... 33
3.2.7 紫外光/可見光光譜儀(UV-Vis) .......................................... 33
3.2.8 螢光光譜儀(Fluorescence spectrophotometer, PL) ............ 34
第四章 結果與討論..................................................................................... 39
4.1 溶膠–凝膠反應 ................................................................................... 39
4.2 X 光繞射分析(XRD) .......................................................................... 43
4.3 傅立葉紅外線轉換光譜 (FT-IR) ........................................................ 56
4.4 X-光光電子能譜 (XPS) ..................................................................... 58
4.5 熱重分析與熱示差掃描分析 ............................................................. 62
4.6 SEM 分析 ............................................................................................ 64
4.7 TEM 分析............................................................................................ 68
4.8 UV-Vis 分析 ........................................................................................ 71
4.9 PL 分析 ............................................................................................... 79
4.10 熱淬滅分析 ...................................................................................... 90
4.10 衰減時間量測分析 .......................................................................... 92
4.11 色度座標分析 .................................................................................. 95
第五章 結論 .............................................................................................. 100
參考文獻 .................................................................................................... 101
Extended Abstract ....................................................................................... 106

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