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研究生:林文煇
研究生(外文):Wen-Hui Lin
論文名稱:以化學共沉澱法製備硼酸釤釔螢光粉之晶體結構與發光特性研究
論文名稱(外文):The Optical and Structure Characteristics of YBO3:Sm3+ Phosphors Synthesized by Chemical Co-precipitation Method
指導教授:呂昊穎
指導教授(外文):Hao-Ying Lu
口試委員:閔庭輝姬梁文
口試委員(外文):Teen-Hang MeenLiang-Wen Ji
口試日期:2014-07-04
學位類別:碩士
校院名稱:國立金門大學
系所名稱:電子工程學系碩士班
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2014
畢業學年度:102
語文別:中文
論文頁數:71
中文關鍵詞:化學共沉澱法螢光粉YBO3
外文關鍵詞:Chemical Co-precipitation MethodphosphorYBO3
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本論文使用化學共沉澱法製備硼酸釤釔螢光粉(YBO3:Sm3+),以硝酸釔、硝酸釤、硼酸作為起始材料,經由氨水滴定可收集氫氧化沉澱物,接著透過離心、洗滌、烘乾與適當之高溫熱處理可得到螢光粉體。本研究分為五個部分,(一)不同熱處理溫度下所合成之YBO3螢光粉體。(二) 不同熱處理溫度下所製備之YBO3:Sm3+螢光粉光學特性研究。(三) 不同 Sm3+離子摻雜濃度對於YBO3螢光粉之發光特性影響。(四) PEG 10000對於YBO3:Sm3+螢光粉粉體尺寸之影響研究 。(五) Sm3+ 與Al3+共摻雜對於YBO3螢光粉發光特性之研究。
於本研究成果中顯示以化學共沉澱法所製備之YBO3螢光粉為六角晶系結構,且以1200℃熱處理所得到之YBO3:Sm3+螢光粉,其發光效率最好。而於1200℃熱處理溫度下,1%的Sm3+摻雜濃度,可使YBO3螢光粉具有最佳的發光特性,隨著摻雜濃度的上升,濃度淬滅效應可明顯被觀察到。若加入PEG 10000於製程中,YBO3:Sm3+螢光粉體之顆粒團聚情形有明顯改善,有助於降低粉體尺寸。最後,以Al3+共摻雜至YBO3:Sm3+中,於相同熱處理溫度下,有助於螢光粉之發光效率提升。

YBO3:Sm3+ phosphors were synthesized by chemical co-precipitation method in this research, Y(NO3)3, Sm(NO3)3 and H3BO3 were used as starting materials and mixed by stoichiometry ratio in water, then ammonia water was used to titrate the above solution. After centrifugation, washing, drying and suitable annealing, the YBO3 phosphors can be obtained.
There are five research subjects in this study, 1, characteristics of YBO3 phosphors with different annealing temperatures, 2, characteristics of YBO3:Sm3+ phosphors with different annealing temperatures, 3, influences of different Sm3+ concentrations on optical characteristics, 4, influences of additive PEG 10000 on particle sizes, 5, improvement of photoluminescence efficiency with co-dopant Al3+. All data of the above experiments were examined by XRD, SEM, PL, PLE and CIE coordinates.
In this research, the YBO3 phosphor synthesized by chemical co-precipitation method possesses hexagonal structure, and it can emit the best photoluminescence intensity with annealing temperature 1200℃. Concentration quench effect was also observed as the Sm3+ dopant concentration is higher than 1%. By means of PEG 10000, the aggregation phenomenon can be improved and it can reduce the mean particle size. With suitable co-dopant Al3+ concentration, the phosphor YBO3:Sm3+, Al3+ with the same synthesis parameters can emit stronger light.

摘要 i
Abstract ii
致謝 iv
目錄 v
表目錄 vii
圖目錄 viii
第一章 前言 1
1-1緒論 1
1-2 研究動機與目的 2
第二章 背景知識與相關研究 4
2-1 發光機制 4
2-2 螢光(fluorescence)與磷光(phosphorescence) 4
2-3 螢光材料種類 5
2-4 激發種類和應用 6
2-5 固態材料光致發光 7
2-5-1本質型發光( intrinsic luminescence) 7
2-5-2外質型發光(extrinsic luminescence) 7
2-6影響發光性質因素 8
2-6-1濃度淬滅(concentration quenching) 8
2-6-2組態座標(configuration coordination) 8
2-6-3史塔克位移(stokes shift) 8
2-6-4能量轉移(energy transfer) 9
2-7聚乙二醇poly(ethylene glycol) 9
2-8螢光粉合成方法 15
2-8-1溶膠凝膠法(sol-gel method) 15
2-8-2化學共沉澱法(chemical co-precipitation method) 15
2-8-3固態反應法(solid-state reaction) 15
2-8-4水熱合成法(hydrothermal method) 16
2-8-5噴霧熱分解法(spray pyrolysis method) 16
2-9螢光粉體文獻回顧 16
第三章 實驗方法與步驟 24
3-1實驗概述 24
3-2實驗材料 24
3-3實驗步驟 25
3-4分析儀器 27
3-4-1 X光繞射儀(X-ray diffraction, XRD)分析 27
3-4-2掃描式電子顯微鏡( scanning electron microscopy, SEM ) 分析 28
3-4-3光學特性分析 28
第四章 結果與討論 33
4-1 不同熱處理溫度下所合成之YBO3螢光粉體之光學特性研究 33
4-1-1 X光繞射(X-ray diffraction)結構分析 33
4-1-2 SEM微觀結構與表面分析 33
4-2 不同熱處理溫度下所製備之YBO3:Sm3+螢光粉光學特性研究 36
4-2-1 X光繞射(X-ray diffraction)結構分析 36
4-2-2激發與發射光譜 (excitation and emission spectra) 36
4-2-3 CIE1931色度座標圖 37
4-2-4 SEM微觀結構與表面分析 37
4-3不同 Sm3+離子摻雜濃度對於YBO3螢光粉之發光特性影響 43
4-3-1 X光繞射(X-ray diffraction)結構分析 43
4-3-2 激發與發射光譜 (excitation and emission spectra) 43
4-3-3 CIE1931色度座標圖 44
4-3-4 SEM微觀結構與表面分析 44
4-4 PEG 10000對於YBO3:Sm3+螢光粉粉體尺寸之影響研究 50
4-4-1 X光繞射(X-ray diffraction)結構分析 50
4-4-2激發與發射光譜 (excitation and emission spectra) 50
4-4-3 SEM微觀結構與表面分析 51
4-5 Sm3+ 與 Al3+共摻雜對於YBO3螢光粉發光特性之研究 56
4-5-1 X光繞射(X-ray diffraction)結構分析 56
4-5-2 激發與發射光譜 (excitation and emission spectra) 56
4-5-3 CIE1931色度座標圖 57
4-5-4 SEM微觀結構與表面分析 58
第五章 結論 64
參考文獻 65

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