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研究生:黃玟瑜
研究生(外文):Wen-Yu Huang
論文名稱:具咔唑、含氟基團及芴之共聚高分子合成、性質探討及其在藍色螢光有機發光二極體之應用
論文名稱(外文):Synthesis and Characterization of Copolymer with Carbazole,Tetrafluorobenzene and Fluorene and their Applicationsin Blue Fluorescent Organic Light-emitting Diodes
指導教授:梁文傑梁文傑引用關係
指導教授(外文):Man-kit Leung
口試日期:2017-07-13
學位類別:碩士
校院名稱:國立臺灣大學
系所名稱:化學研究所
學門:自然科學學門
學類:化學學類
論文種類:學術論文
論文出版年:2017
畢業學年度:105
語文別:中文
論文頁數:143
中文關鍵詞:高分子有機藍光發光二極體咔唑含氟基團旋轉塗佈
外文關鍵詞:Polymer organic blue light emitting diodesfluorenecarbazoletetrafluorobenzenespin-coating
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目前有機發光二極體的元件製作,在光的三原色紅、綠以及藍光之中,紅光及綠光的 OLED 材料都已經有穩定且不錯的表現,但藍光 OLED 卻遠遠不及紅、綠光OLED 的表現,在本研究中以具有高量子產率分子芴為共聚高分子的骨幹,芴的吸光及放光波長很窄且相差40 nm以上,因此不會出現自吸收的現象,再者芴的放光波長 (438 nm) 落在可見光藍光範圍中,而且此分子具有簡易合成以及容易純化的特性,在元件操作上也有很好的光穩定性及熱穩定性,且不易結晶的特性,並藉由加入具有電洞傳輸性質的咔唑 (carbazole) 以及具有電子傳輸性質的含氟基團,同時我們也將探討此系列高分子的光物理性質與電化學性質,並且將其製作成non-doped藍光有機發光二極體,此系列材料具有良好的成膜性及高量子率,可運用旋轉塗佈方式製作成簡單的雙層元件,並探討此發光材料在藍光有機發光二極體上的表現;以共聚物 P5 製作的雙層元件 (ITO/PEDOT:PSS/P5 (70 nm)/Mg:Ag) 表現可達到發光效率 0.176 cd A-1,亮度 481 cd m-2,功率效率 0.038 lm W-1,並且使用電子傳輸材料 TPBi 後(ITO/PEDOT;PSS/P5(58 nm)/TPBi/Mg:Ag),元件表現可提升至發光效率 0.660 cd A-1,亮度 311 cd m-2,功率效率 0.127 lm W-1。
Organic light emitting diodes have good and stable performance of red and green light, but blue light isn’t stable and efficient than red and green light. We synthesized a series of deep blue emitting alternating copolymers, comprising commercial available carbazole, tetrafluorobenzene and fluorene monomer units, and had good thermal stability with high glass transition (Tg) and decomposition temperature (Td). Moreover, we studied the photophysical and electrochemistry properties of all copolymers, and emitted around blue visible light (420 nm). The best performance of double-layer device (ITO/PEDOT:PSS/P5 (70 nm)/Mg:Ag) with solution-processed is current efficiency 0.176 cd A-1, brightness 481 cd m-2, and power efficiency 0.038 lm W-1. By introducing TPBi as the electron transporting layer, the best device performance of copolymer P5 is current efficiency 0.660 cd A-1, brightness 311 cd m-2, and power efficiency 0.127 lm W-1 with structure ITO/PEDOT:PSS/P5 (58 nm)/TPBi/Mg:Ag.
目錄
摘要 I
Abstract II
致謝 III
化合物編號 IV
第一章 緒論 1
1-1 前言 1
1-2 有機發光二極體之發展歷史 1
1-3 OLEDs 多層元件發展 4
1-3.1 陽極與陰極材料 5
1-3.2 電洞注入材料與電子注入材料 6
1-3.3 電洞傳輸材料及電子傳輸材料 7
1-3.4 有機發光材料 9
1-4 有機發光二極體之發光原理 11
1-4.1 螢光與磷光理論 11
1-4.2 有機發光二極體之發光原理 12
第二章 文獻回顧 14
2-1 non-doped有機發光二極體 14
2-2 研究動機 18
第三章 結果與討論 21
3-1 合成策略與方法 21
3-2 高分子的合成方法與結果 23
3-3 熱性質探討 28
3-4 光學性質探討 31
3-5 高分子量子率測量 36
3-6 電化學性質探討 37
3-7 高分子之元件製備與性質探討 44
3-7.1 元件製作方法 44
3-7.2 高分子之元件探討 45
第四章 結論 55
參考文獻 56
第五章 實驗部分 62
5-1 實驗儀器與試劑 62
5-2 合成步驟 64
附錄一 高分子 P5 之 life time 測量 79
附錄二 高分子 P1-P3 之 EML SPPO13 solution processed device 81
附錄三 共聚物之 GPC 圖譜 84
附錄四 共聚物之 DSC 圖 90
附錄五 共聚物之 TGA 圖 92
附錄六 化合物 3、8 之 x-ray 圖譜 94
化合物 3 之 x-ray 光譜 95
化合物 8 之 x-ray 108
附錄七 化合物之核磁共振光譜圖 117
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