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系統識別號 U0026-2008201409512900
論文名稱(中文) P3HT在Au(111)表面自組裝行為及其單分子膜特性之研究
論文名稱(英文) The Studies of Self-assembly Behavior and Monolayer Characteristics of P3HT on Au(111)
校院名稱 成功大學
系所名稱(中) 化學工程學系
系所名稱(英) Department of Chemical Engineering
學年度 102
學期 2
出版年 103
研究生(中文) 柯品全
研究生(英文) Pin-Chuan Ke
學號 N36011235
學位類別 碩士
語文別 中文
論文頁數 115頁
口試委員 指導教授-李玉郎
口試委員-姚學麟
口試委員-張鑑祥
口試委員-楊曜嘉
中文關鍵字 半導體高分子  自組裝分子膜  聚(3-己基噻吩)  電化學  掃描穿隧顯微鏡 
英文關鍵字 semiconductor polymer  self-assemble layer  Poly(3-hexylthiophene-2,5-diyl)  P3HT  electrochemistry  STM 
學科別分類
中文摘要 有機半導體電子元件的表現與有機半導體薄膜分子排列有關,然而有機半導體分子常因與金屬表面間的強吸引力而無法形成規則排列,本研究藉由有機半導體高分子自組裝行為的探討,期望能夠以簡單的方法製備出規則的有機半導體薄膜於金屬表面。本研究利用循環伏安儀(cyclic voltammetry, CV)、紅外光光譜儀(Fourier transform infrared spectroscopy,FTIR)及電化學式掃描電子穿隧顯微鏡(electrochemical scanning tunneling microscopy, EC-STM)來探討自組裝時P3HT的濃度對Poly(3-hexylthiophene-2,5-diyl)(P3HT)分子於金(111)電極表面上吸附行為之影響。由實驗結果,P3HT分子膜能穩定存在於0.05~0.9V(vs. RHE)區間。另外,此分子膜會於較高之電位[0.7~0.9V(vs. RHE)]導通電洞。由STM的觀察發現,在乾淨的金(111)表面上,高濃度的P3HT會覆滿整個金屬表面形成多層結構,且形成彎曲、不規則的吸附型態。P3HT的濃度降低,受到溶液中P3HT擴散速率影響,P3HT吸附的驅動力會減小,當濃度低到某種程度,自組裝的P3HT會形成單層的吸附型態,甚至無法覆蓋滿一層,此時可觀察到P3HT直鏈狀的吸附結構。其成因推測是,於自組裝階段P3HT與溶劑間的作用力大於P3HT與載體間的作用力,故能形成此直鏈狀的吸附結構。
英文摘要 The performance of organic semiconductor devices depends to a great extent on the arrangement and of molecules adsorbed on metal substrate surfaces. A central challenge in the creation of well-ordered, supramolecular nanostructures are strong interactions between adsorbent and metal which often lead to poorly ordered adlayer phases. By studying conjugated polymer self-assembled film behavior, techniques to produce organic semiconductor films with desired properties are expected. Cyclic voltammetry (CV), Fourier transform infrared spectroscopy(FTIR) and electrochemical scanning tunneling microscopy (EC-STM) were used to study the self-assembly behavior of Poly(3-hexylthiophene-2,5-diyl)(P3HT)on Au(111), as well as effect of P3HT assemble concentration on film properties
Cyclic Voltammograms reveal that P3HT self-assemble monolayer is stable between 0.05~0.9V(vs. RHE), and it was slightly P-doped at positive electrode potential. Under the observation of an in-situ STM, high concentration P3HT form multilayer and randomly oriented and/or curvy-wire morphology on a bare Au(111) electrode. By means of lowering P3HT concentration, the interaction between P3HT and substrate is weakened. When the concentration is low enough, with lower P3HT diffusion rate in solution, P3HT barely form a monolayer. P3HT linear chain structures are observed, when P3HT even do not cover a full layer on Au(111) surface. It is surmised that P3HT-solvent interaction is stronger than P3HT-substrate interaction when assembling, so the linear chain structures form on surface.
論文目次 摘要 I
Abstract II
Extended Abstract IV
致謝 XI
目錄 XIII
表目錄 XVI
圖目錄 XVII
第一章 緒論 1
1.1 前言 1
1.2 研究動機 2
第二章 文獻回顧 3
2.1 有機半導體高分子 3
2.1.1 導電高分子簡介 3
2.1.2 有機半導體分子起源 6
2.1.3 有機導電高分子材料特性 11
2.1.4 共軛高分子的分類 15
2.1.5 位置規則性聚3-烷基噻吩 18
2.2 有機半導體材料的元件分類 20
2.3 有機金屬錯合物、小分子型有機半導體 24
2.4 高分子型有機半導體 30
第三章 實驗部分 37
3.1 氣體與耗材 37
3.2 藥品 37
3.3 儀器設備 38
3.3.1 循環伏安儀 (Cyclic Voltammogram, CV) 38
3.3.2 掃描式電子穿隧顯微鏡(Scanning Tunneling Microscopy, STM) 41
3.3.3 傅立葉轉換紅外光光譜儀 51
3.3.4 拉曼圖譜分析 (Raman Spectrum) 54
3.3.5 電化學阻抗分析(Electrochemical Impedance Spectroscopy, EIS) 56
3.4 實驗步驟 65
3.4.1 金屬單晶電極的製備 65
3.4.2 STM的前處理 66
3.4.3 循環伏安儀的前處理 68
3.4.4 P3HT自組裝單分子膜的製備 69
第四章 結果與討論 71
4.1 金(111)的重排現象 71
4.1.1 金(111)在酸性溶液中之循環伏安圖 71
4.1.2 STM觀察金(111)於酸性溶液中之重排現象 72
4.2 P3HT [Poly(3-hexylthiophene-2,5-diyl)]於金(111)表面之吸附特性探討 76
4.2.1 以STM觀察P3HT膜於金(111)電極之表面型態及自組裝行為 76
4.2.2 以不同P3HT濃度修飾之金(111)電極性質之探討 79
4.3 P3HT [Poly(3-hexylthiophene-2,5-diyl)]於金(111)表面自組裝行為之探討 92
4.3.1 高濃度區間 92
4.3.2 低濃度區間 97
4.3.3 層數之比較 103
4.3.4 小範圍吸附結構可能之成因 105
第五章 結論 108
第六章 參考文獻 109
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