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研究生: 郭子瑞
Kuo, Zi-Rui
論文名稱: Synthesis of cyclopentadithiophene based low bandgap oliogomers and polymers
指導教授: 堀江正樹
Masaki Horie
口試委員: 蘇安仲
Su, An-Chung
游進陽
Yu, Chin-Yang
學位類別: 碩士
Master
系所名稱: 工學院 - 化學工程學系
Department of Chemical Engineering
論文出版年: 2012
畢業學年度: 100
語文別: 英文
論文頁數: 94
中文關鍵詞: synthesisorganic filed effect transistor
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  • Conjugated polymers have amazing potential as the components of polymeric light emitting diodes (PLEDs), organic field transistors (OFETs) and organic photovoltaic cells (OPVs). In these conjugated polymers, cyclopentadithiophene based polymers show excellent device performances. In this research, the cyclopentadithiophene analogues have been synthesized and characterized by 1H-NMR and mass spectroscopies. Obtained cyclopentadithiophenes and oligomeric molecules were polymerized by oxidative polymerization or direct arylation. The optical and electrochemical properties of the copolymers were measured by cyclic voltammetry and UV-vis spectroscopy. Hole transporting characteristics particularly mobility of these polymers were observed by OFET devices fabricated from chlorobenzene solutions of these polymers varying annealing temperature.


    Chapter 1: Introduction and Literature Survey ................................................................................. 1 1.1 Introduction of Conjugated Polymer ...................................................................................... 1 1.2 Principle of the Conductive Mechanism for Conjugated Polymers ....................................... 4 1.3 The Application of Conjugated Polymers ............................................................................ 11 1.4 Purpose of This Work ........................................................................................................... 29 Chapter 2: Synthesis, Characterization, and OFET Characteristics of Cyclopentadithiophene and Benzothiadiazole Based Oligomer and Polymers .......................................................................... 31 2.1 Introduction .......................................................................................................................... 31 2.2 Synthesis of Oligomer and Polymer-PCPDBT .................................................................... 34 2.2.1 Synthesis of Oligomer ................................................................................................... 34 2.2.2 Synthesis of Polymer P(CPDT-BT-CPDT) ................................................................... 37 2.3 Optical and Electrochemical properties ................................................................................ 39 2.4 OFET characteristics ............................................................................................................ 40 2.5 Conclusion ............................................................................................................................ 44 Chapter 3: Synthesis and Characterization of Cyclopentadithiophene and Thienopyrrole-dione Oligomer and Polymers .................................................................................................................. 45 3.1 Introduction .......................................................................................................................... 45 3.2 Synthesis of Oligomer and Polymers ................................................................................... 48 3.2.1 Synthesis of Dibromo- thienopyrrole-dione (dibromo-TPD) ........................................ 49 3.2.2 Synthesis of CPDT-TPD-CPDT .................................................................................... 51 3.2.3 Synthesis of Polymer, P(CPDT-TPD-CPDT) ............................................................... 54 3.2.4 Synthesis of Polymer, P(CPDT-TPD) ........................................................................... 56 3.3 Optical and Electrochemical Properties of Oligomer and Polymers .................................... 58 3.4 Thermal Properties of Polymer ............................................................................................ 63 3.5 Conclusion ............................................................................................................................ 64 Chapter 4: Experimental Section .................................................................................................... 65 4.1 General Experimental Methods ............................................................................................ 65 IV 4.2 Synthesis of cyclopentadithiophene (CPDT) ....................................................................... 67 4.2.1 Bis(2-iodothiophen-3-yl) methanol ............................................................................... 67 4.2.2 Bis(2-iodothiophen-3-yl)methanone ............................................................................. 68 4.2.3 Cyclopenta[2,1-b;3,4-b']dithiophen-4-one .................................................................... 68 4.2.4 4H-Cyclopenta[2,1-b;3,4-b']dithiophene ....................................................................... 69 4.2.5 4,4-Didodecylcyclopenta[2,1-b;3,4-b']dithiophene ....................................................... 70 4.2.6 4,4-Diethylhexylcyclopenta[2,1-b;3,4-b']dithiophene ................................................... 71 4.2.7 Monobromo-4, 4-didodecylcyclopenta[2, 1-b; 3, 4-b']dithiophene ............................... 72 4.3 Synthesis of thieno[3,4-c]pyrrole-4, 6-dione (TPD)............................................................. 74 4.3.1 Thieno[3,4-c]furan-1,3-dione ........................................................................................ 74 4.3.2 Hexyl-5H-thieno[3,4-c]pyrrole-4,6-dione ..................................................................... 74 4.3.3 Dibromo-5-hexyl-5H-thieno[3,4-c]pyrrole-4,6-dione ................................................... 75 4.4 Synthesis of oligomers ......................................................................................................... 77 4.4.1 CPDT-BT-CPDT ........................................................................................................... 77 4.4.2 CPDT-TPD-CPDT ........................................................................................................ 78 4.5 Synthesis of polymers ........................................................................................................... 80 4.5.1 P(CPDT-BT-CPDT) ...................................................................................................... 80 4.5.2 Synthesis of P(CPDT-TPD)........................................................................................... 81 4.5.3 Synthesis of P(CPDT-TPD-CPDT) ............................................................................... 82 Chapter 5: Conclusion .................................................................................................................... 87 reference ......................................................................................................................................... 89

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