臺灣博碩士論文加值系統

本實驗是將含有多苯環的TP-PPV單體和側接烷氧基的MEH-PPV單體利用CPR和Wittig reaction方式聚合成共聚物，進而探討它們的發光性質。利用CPR方式所得到的是隨機排列(random)的聚合物，而利用Wittig反應可製備 1:1的TP-PPV/MEH-PPV交替式共聚物。由初步研究成果發現TP-PPV比傳統PPV具有較高的PL效率，其PL放射峰在509nm，而且TP-PPV的化學穩定性也比較好，缺點是溶解性不佳，由導入溶解性好而且發紅光的MEH-PPV，與TP-PPV做成不同比例的共聚物，可增加其溶解性以及發白光的可行性。
利用CPR方式所得到共聚物，由於結合了TP-PPV和MEH-PPV光譜特性，其UV-VIS吸收波長分佈很廣，PL圖譜的放射峰亦十分寬廣，用多種波長的光激發TP-PPV/MEH-PPV共聚物，都只得到一個PL放射波峰，而且PL效率比傳統PPV高。此外當TP-PPV含量提高到4:1的共聚物，其PL放射峰涵蓋了短波長和長波長的範圍，其LED元件是發淡藍白光，但是由於材料製程控制不易，目前尚無法進一步得到其EL光譜。Wittig反應得到的共聚物，由於排列上較為規則，所得到的PL光譜也較單純，約在535nm附近。

In this research, we employed the CPR (Chlorine Precursor Route) and Wittig methods to prepare the TP-PPV/MEH-PPV copolymers and discussed their luminescent properties. Random copolymers were obtained from CPR method and an alternative copolymer obtained from Wittig method. From initial study efforts, it was found that TP-PPV has higher PL efficiency with an emission peak at 509nm, and more stable emission than PPV but barely soluble in organic solvents. So we introduced the MEH-PPV to synthesize the TP-PPV/MEH-PPV copolymers in different ratio in order to improve their solubility and luminescent properties.
Copolymers obtained by CPR method have broad absorption peaks in both their UV-VIS spectra and PL spectra. Besides, when TP-PPV content in the TP-PPV/MEH-PPV copolymer is increased to 4:1, we observed a pale blue-white color in its EL emission of the LED device. But due to the poor process condition, we couldn’t obtain the EL spectra. Further research is ongoing. However, the alternative copolymer prepared from the Wittig method has a simpler PL spectrum with an emission peak appeared at 535nm. It is a red-shifted as compared to PPV.

中文摘要………………………………………………………………II
英文摘要………………………………………………………………III
目錄……………………………………………………………………V
表目錄…………………………………………………………………VII
圖目錄…………………………………………………………………VIII
第一章. 緒論
1.1 前言………………………………………………………………1
1.2 文獻回顧…………………………………………………………2
1.3 發光原理…………………………………………………………6
1.3.1 共軛系統………………………………………………6
1.3.2 發光機構………………………………………………7
1.4 研究目的與方向…………………………………………………8
第二章. 實驗
2.1 實驗目的…………………………………………………………10
2.2 實驗方法…………………………………………………………11
2.2.1 合成方法………………………………………………11
2.2.2 藥品……………………………………………………13
2.2.3 實驗合成方法…………………………………………15
2.3 性質測試…………………………………………………………19
2.3.1 NMR ……………………………………………………19
2.3.2 UV-VIS…………………………………………………19
2.3.3光激發光PL ……………………………………………19
2.3.4時間衰減PL ……………………………………………19
2.3.5利用GPC量測分子量……………………………………20
2.3.6光電二極體之製備流程 ………………………………20
2.3.7電流電壓曲線量測 ……………………………………20
第三章. 結果與討論
3.1 化學合成產物與圖譜分析………………………………………22
3.2 物理性質…………………………………………………………27
3.2.1 UV-VIS…………………………………………………27
3.2.2光激發光(PL)圖譜 ……………………………………30
3.2.3電激發光(EL) …………………………………………33
第四章. 結論…………………………………………………………34
參考文獻………………………………………………………………36

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