臺灣博碩士論文加值系統

本論文研究聚[1-甲氧基-4-(2’-乙基-己氧基)-2,5-苯乙烯]，((poly[1-methoxy-4-(2’-ethyl-hexyloxy)-2,5-phenylene vinylene]，簡稱MEH-PPV))於四氫呋喃(tetrahydrofuran,THF)及甲苯(toluene)溶液中的分子形態，除了利用動態光散射及靜態光散射研究溶液的物理性質外，還使用冷凍乾燥將高分子吸附於銅網上，利用穿透式電子顯微鏡(TEM)直接觀察MEH-PPV於不同溶劑下之分子型態。由光散射的結果發現，THF溶液測得的二維里係數(A2)略小於零，而在甲苯裡是正值，顯示甲苯對MEH-PPV是一個比較好的溶劑。而在THF溶液中所測得的分子量及粒徑皆比在甲苯中的值大出甚多，顯示MEH-PPV在THF溶液可能產生了聚集。

We investigated the molecular conformation of poly[1-methoxy-4- (2’-ethyl- hexyloxy)-2,5-phenylene vinylene] (MEH-PPV) in tetrahydrofuran (THF) and toluene solutions using dynamic light scattering (DLS) and static light scattering (SLS). Moreover the solutions were freeze dried and the molecular conformations of MEH-PPV were observed by Transmission Electron Microscopy (TEM). From the results of light scattering, the second virial coefficient (A2) in THF is slightly negative and in toluene is positive. It revealed that toluene is a better solvent for MEH-PPV than THF. The radius of gyration (Rg) and the weight average molecular weight (Mw) is larger in THF than in toluene, indicating the molecules aggregate in THF.

中文摘要
英文摘要
目錄………………………………………………………………...……..Ⅰ
表目錄…………………………………………………………………….Ⅳ
圖目錄…………………………………………………………………….Ⅴ

第一章 前言...............................................................................................1
1-1共軛導電高分子簡介.............................................................................1
1-2有機發光二極體簡介.............................................................................3
1-3有機發光二極體的發展.........................................................................4
1-4共軛導電高分子發光原理.....................................................................6
1-4-1光激發光…………………………………….....………………..6
1-4-2電激發光………………………………….....…………………..7
1-5有機發光二極體元件結構文獻……………………….………………8
1-5-1單層結構元件…………………………………………….……..8
1-5-2雙層結構元件……………………………………………….…10
1-5-3多層結構元件……………………………………….…………13
1-5-4可撓曲性元件…………………………………….……………13
1-6 PPV溶液相關文獻回顧……...………...…..…………………….…..14
1-7研究目的……...………...…..……………………….………………..18
1-8分子鬆弛運動……...………...…..……………………….…………..19
1-9動態光散射與分子運動……...………...…..…………………….…..20

第二章 實驗方法與步驟.........................................................................24
2-1實驗架構表………………...………………...……...…………..……24
2-2實驗藥品...............................................................................................25
2-3動態光散射實驗...................................................................................27
2-3-1樣品配製……………….………………………………….....…27
2-3-2動態光散射實驗……………….………………………….…...27
2-4靜態光散射實驗………………...……...…………………………....32
2-4-1樣品配製……………….…………………………………........32
2-4-2微差折射率………………………….…………………………32
2-4-3靜態光散射Zimm plot…..……………………………….……33
2-4-4去極化率校正…………………………………….……………39
2-5穿透式電子顯微鏡實驗………………...……...……………………41
2-5-1樣品處理……………….…………………………………........41
2-5-2實驗步驟及儀器設定.................................................................41

第三章 結果與討論.................................................................................43
3-1 MEH-PPV/THF溶液……………………………...……………….....43
3-1-1 MEH-PPV/THF溶液之動態光散射..........................................43
3-1-2 MEH-PPV/THF溶液之靜態光散射…......................................73
3-1-2-1微差折射率量測…………...……..……….....…..........73
3-1-2-2 Zimm plot……………..……..……………….……......75
3-1-3 MEH-PPV/THF溶液穿透式電子顯微鏡觀察…......................77
3-2 MEH-PPV/toluene溶液……………………........................................80
3-2-1 MEH-PPV/toluene溶液之動態光散射......................................80
3-2-2 MEH-PPV/toluene溶液之靜態光散射....................................110
3-2-2-1微差折射率量測…………...……..……….....…........110
3-2-2-2 Zimm plot……………..……..……………….……....110
3-2-3 MEH-PPV/toluene溶液穿透式電子顯微鏡觀察…................112
3-3 MEH-PPV / THF與MEH-PPV / toluene數據討論..........................117

第四章 結論....................……………………………………………...119

第五章 參考文獻……………………………………………………...120
5-1英文字母區…………………………………………………………120
5-2中文字區……………………………………………………………128

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