臺灣博碩士論文加值系統

螢光共軛高分子，在發光元件與太陽能電池等光學產物上，有良好的應用發揮潛力，近年來被廣泛的研究。拉伸MEH-PPV (聚[2-甲氧基-5-(2''乙基己氧基)-1, 4-对苯乙炔]) / PS (聚苯乙烯) 薄膜中，觀察到的結果顯示出，Craze區域的形成能夠增加光致螢光的效果。實驗中使用共焦顯微鏡，研究這些Craze的光學性質，觀察後發現，在拉伸後的樣本中，Craze的發光區域有高度的偏振變化反應，聚合物在Craze區域裡面，相對比在非Craze區域中，提高了30%存活時間，這項實驗結果表示，將MEH-PPV拉伸以後，能夠增加發光誘導以及對抗光致漂白現象。

Potential applications in light emitting devices and solar cells have led to extensive research into optimizing the optical properties of Luminescent Conjugated Polymers. Straining MEH-PPV (poly[2-methoxy,5-(2''- ethylhexyloxy)-1,4-phenylenevinylene]) / PS (Polystyrene) thin films has been observed to result in craze formation and an enhancement of photoluminescence (PL). Using confocal microscopy, the optical properties of these crazes were investigated. Emission from developed crazes was found to be highly polarized while a variety of effects were found for developing crazes. The survival time of polymers in the crazed regions was increased by over 30% relative to the bulk. This suggests a stretch induced alignment of emitting segments in MEH-PPV as well as an increased resistance to photo-bleaching.

摘要.......................................................i
ABSTRACT..................................................ii
誌謝.....................................................iii
目錄......................................................iv
圖目錄....................................................vi
表目錄..................................................viii
第一章 介紹................................................1
1-1 前言...................................................1
1-1-1 何謂共軛高分子.......................................1
1-1-2 何謂Craze............................................2
1-1-3 何謂共焦顯微鏡.......................................3
1-2 研究動機及目的.........................................4
1-2-1 觀察拉伸薄膜後的發光增益.............................4
1-2-2 MEH-PPV纖維結構與波導效應............................4
第二章 實驗步驟與方法......................................7
2-1 Craze Sample製作方法[1]................................7
2-2 實驗設備描述...........................................9
2-3 LabView程式...........................................11
2-3-1 程式功能介紹........................................11
2-3-2 操作程序描述........................................16
2-4 公式計算..............................................18
第三章 實驗結果...........................................20
3-1 螢光光譜..............................................20
3-2 AFM數據...............................................23
3-3 非共焦顯微鏡與共焦顯微鏡PL圖片........................26
3-4 Crazed區域發光波長....................................28
3-5 Emission偏振影響......................................31
3-6 Excitation偏振影響....................................36
3-7 Photo-Bleaching.......................................38
3-7-1 Photo-Bleaching形狀.................................38
3-7-2 Photo-Bleaching能量強度.............................39
3-7-3 Changes along a single craze........................41
第四章 總結與討論.........................................43
4-1 Contributions to enhancement in Far-Field.............44
4-2 Polarization..........................................47
4-2-1 Emission............................................47
4-2-2 Excitation..........................................48
4-3 MEH-PPV concentration and expected signal.............49
4-4 Application to Devices................................50
4-4-1 Reduced Photo-Bleaching to Extend Device Lifetime...50
4-4-2 Increased Extraction Efficiency.....................50
4-4-3 Increased Efficiency................................50
4-4-4 Quantum Well Analogy................................51
第五章 Next Step..........................................52
第六章 參考文獻...........................................53

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