剪切力溶液製程應用於高效能有機薄膜電晶體：含硒碳鏈聯?吩小分子半導體材料

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姓名

林珈琪(Chia-Chi LIN) 查詢紙本館藏

畢業系所

化學工程與材料工程學系

論文名稱

剪切力溶液製程應用於高效能有機薄膜電晶體：含硒碳鏈聯?吩小分子半導體材料
(Selenium-Alkyl Bithiophene(SeBT)-Based Small Molecular Semiconductors via Solution Sheared Method for High-Performance Organic Thin-Film Transistors)

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摘要(中)

本研究利用溶液製程並透過剪切力塗佈法製作有機薄膜電晶體元件，主要研究於有機薄膜層，由於之前實驗室製作含硫碳鏈之p-type有機小分子材料SBT，有機薄膜元件電性達1.7 cm2V-1s-1。本研究將硒取代硫原子運用不同鍊長的含硒碳鏈之聯?吩(selenylated bithiophene; SeBT)為核心，核心頭尾兩端接上三併環?吩(2,6-di(dithieno[3,2-b;2’,3’-d]-thiophen-2yl; DDTT）為主軸，合成本研究使用得P-type有機小分子半導體材料DDTT-SeBT-C6、DDTT-SeBT-C10及DDTT-SeBT-C14。
隨著含硒碳鏈長的增加，載子遷移率從DDTT-SeBT-C6 0.09 cm2V-1s-1，增加至DDTT-SeBT-C10 0.06 cm2V-1s-1，再增加至DDTT-SeBT-C14 4.01 cm2V-1s-1，並利用光學顯微鏡、原子力顯微鏡等儀器分析其表面形貌。其中，DDTT-SeBT-C6薄膜呈現不連續狀，DDTT-SeBT-C10從GIXRD可發現結晶性不佳，所以造成電性不佳，反之，DDTT-SeBT-C14表面形貌呈現連續性且結晶性佳，得到優異的電性表現載子遷移率4.01 cm2V-1s-1，我們利用單晶可知，當側鍊較長時，可改善主軸扭轉角使分子呈平面性提高載子遷移率。

摘要(英)

This study research new small molecule semiconductors via solution shearing manufacture organic thin film transistors. Owing to the previous work thio-alkyl substituted bithiophene (SBT), the organic thin film transistor electrical properties is 1.7 cm2V-1s-1. The series of new small molecules is selenylated bithiophene with different alkyl side chains. Then, add 2,6-di(dithieno[3,2-b;2’,3’-d]-thiophen-2yl (DDTT) to become the main backbone on the both side of the core.
As the carbon length increase, the carrier mobility increases from DDTT-SeBT-C6 0.09 cm2V-1s-1 to DDTT-SeBT-C14 4.01 cm2V-1s-1. The surface morphology was analyzed by optical microscopy, atomic force microscopy, grazing incidence x-ray diffraction, UV-vis spectrophotometer. In these three molecules, the morphology of DDTT-SeBT-C6 is discontinuity. The crystallinity of DDTT-SeBT-C10 is worse. That the reason why they get the poor electrical properties. However, the morphology of DDTT-SeBT-C14 is continuity and the high crystallinity. When the side length increase, the torsion angle can be improved to make the backbone planar to improve the carrier mobility.

關鍵字(中)

★ 溶液製程
★ 剪切力塗佈
★ 有機小分子半導體材料
★ 有機薄膜電晶體

關鍵字(英)

★ OTFT
★ solution shearing
★ organic small molecule semiconductor

論文目次

摘要 I
ABSTRACT II
致謝 III
目錄 IV
圖目錄 VI
表目錄 VIII
第一章緒論 - 1 -
1.1 前言 - 1 -
1.2 有機薄膜電晶體 - 2 -
1.2.1 背景 - 2 -
1.3 基本結構 - 3 -
1.4 界面工程 - 4 -
1.5 基本工作原理 - 7 -
1.6 基本參數與特性曲線 - 8 -
1.7 分子排列與載子傳遞機制 - 10 -
1.8 有機半導體材料 - 11 -
1.9 P-TYPE有機小分子半導體材料 - 11 -
1.10 N-TYPE有機小分子半導體材料 - 14 -
1.11 有機分子之非共價結構閉鎖效應 - 16 -
1.12 有機半導體薄膜製程 - 17 -
1.12.1 真空熱蒸鍍法 - 17 -
1.12.2 溶液製程法 - 18 -
1.13 研究動機 - 20 -
第二章研究方法 - 21 -
2.1 實驗藥品 - 21 -
2.2 實驗設備 - 22 -
2.3 實驗方法 - 23 -
2.3.1 基板前處理與表面修飾 - 23 -
2.3.2 元件設備 - 24 -
2.4 元件半導體層薄膜量測分析 - 25 -
2.4.1 元件電性量測 - 25 -
2.4.2 偏光光學顯微鏡(POLARIZED OPTICAL MICROSCOPY) - 25 -
2.4.3 紫外線-可見光光譜儀（UV-VIS SPECTROPHOTOMETER） - 25 -
2.4.4 原子力顯微鏡 - 26 -
2.4.5 低掠角Ｘ光繞射儀 - 26 -
第三章結果與討論 - 27 -
3.1 有機薄膜電晶體元件電性分析 - 27 -
3.2 有機小分子半導體材料熱性質分析 - 29 -
3.3 有機小分子半導體光譜特性與電化學分析 - 30 -
3.4 有機小分子半導體材料單晶結構分析 - 33 -
3.5 有機小分子材料半導體薄膜之表面形貌分析 - 35 -
3.5.1光學顯微鏡之表面形貌 - 35 -
3.5.2原子力顯微鏡之表面形貌 - 37 -
3.6 有機小分子材料半導體薄膜之微結構分析 - 38 -
3.7 結論與未來展望 - 42 -
3.8 參考文獻 - 43 -
3.9 附錄 - 46 -

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指導教授

劉振良(Cheng-Liang Liu)

審核日期

2018-8-2

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