電子傳輸末端基對Poly(9,9-dioctylfluorene) (PFO) 光電性質的影響

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研究生：	洪銘欽 Ming-Chin Hung
論文名稱：	電子傳輸末端基對Poly(9,9-dioctylfluorene) (PFO) 光電性質的影響 Effects of Electron-Deficient End-Cappers on the Optical and Electrical Properties of Poly(9,9-dioctylfluorene)
指導教授：	陳壽安 Show-An Chen
口試委員:
學位類別：	碩士 Master
系所名稱：	工學院 - 化學工程學系 Department of Chemical Engineering
論文出版年：	2005
畢業學年度：	93
語文別：	中文
論文頁數：	122
中文關鍵詞：	共軛高分子、電致發光、高分子發光二極體、聚茀系共軛高分子、藍光高分子、電子傳輸基團
外文關鍵詞：	conjugated polymer, electroluminescence, PLED, polyfluorene, blue light emitting polymer, electron-transport moiety
相關次數：	點閱：2 下載：0
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本文合成了兩種以電子傳輸基團作為末端基的PFO。實驗結果顯示在使用THF當溶劑時，含有電子傳輸末端基的PFO產生共軛長度較長的發光物種，這個發光物種和文獻上報導的β phase特徵相同。其中TAZ末端基因為具有較大的分子體積和非平面性的分子形狀可以降低高分子鏈之間的交互作用，所以使用PFO-end-TAZ做成的發光元件表現最佳，最高效率及亮度可以達到1.67 cd/A及4000 cd/m2，C.I.E.色度座標的位置在 (0.165, 0.076)，而且座標的位置不隨操作電壓與時間而改變。

We propose a simple way to achieve pure blue emission and improved device efficiency via capping poly(9,9-dioctylfluorene) (PFO) with electron-deficient moieties (EDMs, such as oxadiazole (OXD) and triazole (TAZ)), which can induce minor amount of long conjugating length species (regarded as β phase) to control extents of energy transfer from amorphous matrix to the β phase. The device efficiency of PFO end-capped with TAZ is higher than that with para-tert-butyl phenyl (TBP) by a factor of two (with CsF/Al as cathode), and its electroluminescent (EL) spectrum remains stable and pure blue emission during cyclic operations (C.I.E. color coordinates x = 0.165, y = 0.076, independent of operating voltage and within the limit for pure blue emission x + y < 0.30). The improvement of device efficiency is dependent on the structure of EDM such as size and planarity. The deep blue emission is originated from the incomplete energy transfer from amorphous matrix to β phase induced by the end-cappers.

中文摘要..............................................I
英文摘要.............................................II
目錄................................................III
圖目錄..............................................VII
表目錄...............................................XI


第一章    緒論........................................1
1-1    前言...........................................1
1-2    有機發光二極體.................................4
1-3    有機太陽能電池.................................8
1-4    半導體高分子發光材料..........................12
1-4-1    聚對位苯基乙烯系高分子......................12
1-4-2    聚茀系高分子................................16
1-5    基本光物理....................................19
1-5-1    螢光理論....................................20
1-5-2    影響螢光的因素..............................23
1-5-3    能量傳傳遞機制..............................26


第二章    聚茀系高分子文獻回顧.......................26
2-1    聚合方法......................................27
2-1-1    Yamamoto coupling polymerization............27
2-1-2    Suzuki coupling polymerization..............31
2-2    基本材料特性..................................33
2-3    光物理特性....................................34
2-4    末端基改質的聚茀系高分子......................40
2-5    藍光聚茀系高分子..............................42
2-6    文獻分析......................................46


第三章    實驗內容...................................47
3-1    儀器設備......................................47
3-2    有機發光元件的製作與量測......................48


第四章    電子傳輸末端基對PFO光電性質的影響..........51
4-1    前言..........................................51
4-2    合成實驗部分..................................53
4-2-1    藥品........................................53
4-2-2    單體合成....................................56
4-2-3    末端基合成..................................58
4-2-4    高分子合成..................................61
4-3    末端基鑑定....................................63
4-3-1    元素分析 (EA) ..............................63
4-3-2    核磁共振 (1H-NMR) ..........................64
4-3-3    紅外光光譜分析 (FT-IR) .....................67
4-4    溶劑效應......................................69
4-4-1    以氯仿當溶劑................................69
4-4-1-1    薄膜的UV/PL/PLE光譜分析...................69
4-4-1-2    EL光譜與I-V-B特性分析.....................72
4-4-2    以THF當溶劑.................................78
4-4-2-1    濃度效應..................................78
4-4-2-2    薄膜的UV/PL/PLE光譜分析...................81
4-4-2-3    薄膜的X-ray diffraction (XRD) 分析........84
4-4-2-4    PL光譜模擬................................85
4-4-2-5    溶液及薄膜的螢光量子效率量測..............87
4-4-2-6    EL光譜分析................................88
4-4-2-7    EL光譜模擬................................92
4-4-2-8    I-V-B特性分析.............................94
4-4-3    以THF和甲醇作為混合溶劑.....................98
4-5    末端基含量 (或分子量) 效應...................100
4-6    結論.........................................108

參考文獻............................................110
自傳................................................122

                                

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