臺灣博碩士論文加值系統

本研究是利用溶膠–凝膠法及旋轉塗佈製備鎂橄欖石(forsterite; Mg2SiO4)螢光薄膜，並探討不同的活化劑種類與濃度、熱處理溫度及鍍膜條件對其結構、微結構及發光特性之影響。
乾燥薄膜經燒結500oC後開始產生Mg2SiO4結晶，隨溫度上升至1100oC皆為鎂橄欖石純相，至1300oC時主要為鎂橄欖石及微量頑火輝石(MgSiO3)。薄膜的激發及放射強度隨著熱處理溫度及薄膜厚度增加而增加，歸因於增加燒結溫度及薄膜厚度可增強結晶性，且增加薄膜的厚度可增進薄膜的緻密性。摻雜錳之薄膜經469 nm波長激發後，放射峰位於510 nm，具有綠光特性；摻雜鈦之薄膜經246 nm波長激發後，放射峰位於400 nm，具有藍光特性；摻雜鉻之薄膜經532nm波長激發後，放射峰位於650~950 nm及1063 nm，具有紅光及近紅外光特性。

In this study, magnesium silicate ( Mg2SiO4) phosphor thin films were synthesized by the sol–gel and spin coating method. The influence of different activator concentrations and species, heating temperatures and coating conditions on the structure, microstructure and luminescence characteristics were investigated.
The dried films started to produce Mg2SiO4 crystalline phase after heat treatment at 500oC. On heating to 1100oC, pure forsterite are formed. At 1300oC, forsterite was the mainly phase with a small trace of enstatite (MgSiO3) .
The excitation and emission intensity of the films increased with the increase of heating temperature and film thickness. This is due to the increase of the heat treatment temperature and coating layers can increase the crystallinity, and the increase in the thickness of the film can enhance the surface densification.
Manganese-doped phosphor films showed emission peak at 510 nm under 469 nm excitation, which has the characteristics of green light emission; the phosphor films doped with titanium ions exhibited emission peak at 400 nm under excitation at 246 nm, with blue light characteristics; Chromium-doped phosphor films presented emission peak at 650~950 nm and 1063 nm under 532 nm excitation, with red light and near-infrared light characteristics. The type and concentration of the activator, heat treatment conditions and film thickness will affect the grain size, crystallinity, surface morphology, and luminescent characterizations.

摘要......i
Abstract......iii
誌謝......v
目錄......vi
表目錄......viii
圖目錄......ix
第一章 緒論......1
1.1 前言......1
1.2 研究動機與目的......2
第二章 基礎理論及文獻回顧......5
2.1 鎂橄欖石晶體結構......5
2.2鎂橄欖石特性與應用......5
2.3 鎂橄欖石螢光粉末之製備方法......10
2.3.1固態反應法(Solid state reaction)......10
2.3.2水熱法（Hydrothermal method）......10
2.3.3溶液燃燒法(Solution combustion synthesis)......10
2.3.4溶膠–凝膠法(Sol–gel method)......10
2.4溶膠凝膠法原理......11
2.5螢光材料的特性......12
2.5.1 發光原理......12
2.5.2斯托克斯位移(Stokes shift)......12
2.5.3發光材料的組成......12
2.5.4發光種類......12
2.6影響螢光材料之發光效率因素......17
第三章 實驗方法與步驟......19
3.1 實驗流程......19
3.2分析儀器之原理簡介......21
3.2.1 X光繞射分析儀(X-ray diffraction, XRD)......21
3.2.2 霍氏轉換紅外光譜儀(FT-IR)......21
3.2.3 電子順磁共振光譜 (EPR)......21
3.2.4光光電子能譜 (XPS)......21
3.2.5場發射掃描式電子顯微鏡 (FE-SEM )......22
3.2.6示差掃描熱量分析/熱重分析 (DSC-TGA)......22
3.2.7 紫外光/可見光光譜儀(UV-Vis)......22
3.2.8 螢光光譜儀(Fluorescence spectrophotometer, PL)......22
3.2.9 微拉曼及微光激發螢光光譜儀 (Mirco-Raman& Mirco-PL Spectroscopy)......23
3.2.10原子力顯微鏡 (AFM)......23
第四章 結果與討論......29
4.1 溶膠-凝膠反應......29
4.2X-光繞射圖(XRD)分析[28][29][30]......31
4.3傅立葉紅外線轉換光譜 (FT-IR)......35
4.4熱重分析與熱示差掃描分析[35][36][37][38]......37
4.5 SEM分析......39
4.6 AFM分析[40]......48
4.7 XPS分析......51
4.8 EPR分析......56
4.9 UV-Vis分析......59
4.10 PL分析......64
4.11 CIE色度座標分析......69
4.12 衰減時間量測分析[52]......73
第五章 結論......75
參考文獻......77
Extended Abstract......82

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