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系統識別號 U0026-1207201614004300
論文名稱(中文) 介電修飾層對雙極性有機薄膜電晶體之影響與應用研究
論文名稱(英文) Studies of the dielectric buffer layer effects on the ambipolar organic thin-film transistors and applications
校院名稱 成功大學
系所名稱(中) 光電科學與工程學系
系所名稱(英) Department of Photonics
學年度 104
學期 2
出版年 105
研究生(中文) 黃柏允
研究生(英文) Bo-Yun Huang
學號 L76034077
學位類別 碩士
語文別 中文
論文頁數 113頁
口試委員 指導教授-鄭弘隆
口試委員-周維揚
口試委員-唐富欽
口試委員-王右武
中文關鍵字 雙極性有機電晶體  電特性  聚乙烯亞胺  五環素 
英文關鍵字 ambipolar organic transistors  electrical properties  polyethylenimine  pentacene 
學科別分類
中文摘要 本論文主要為有機薄膜電晶體中導入一高分子材料LPEI,探討其對雙極性電晶體的影響與應用方面之研究。藉由電性分析了解元件的載子傳輸變化,表面能、極化電場圖與導納分析界面的特性,由拉曼、原子力顯微鏡與X光繞射儀分析Pentacene的結構。最後發現LPEI可以有效降低Pentacene元件的N型操作電壓。
電特性分析,導入LPEI後,元件的載子遷移率皆下降,但是LPEI在PMMA與Pentacene間可以有效降低N型臨界電壓。極化電場與導納分析,LPEI可以降低Pentacene元件的缺陷態密度與減少載子鬆弛時間,不過因為PMMA與LPEI偶極相消,導致額外電場的消失,所以有LPEI的Pentacene元件其電特性皆下降。表面能分析,LPEI表面的極性項高,所以不利於Pentacene成長。拉曼光譜分析,LPEI上的Pentacene,其264 cm-1的半高寬變窄,所以電子傳輸較PMMA上的Pentacene佳。原子力顯微鏡與X光繞射分析,因為PMMA玻璃轉換溫度接近380 K,導致PMMA在380 K時分子會大規模的震動。使PMMA上的Pentacene在380 K其結晶變差,而LPEI上的Pentacene在380 K不僅結晶變差,其結晶均勻性也變差。
光感測器分析,PMMA上旋塗LPEI可以提高Pentacene元件光響應能力。光記憶體分析,PMMA上旋塗LPEI對532 nm雷射光有記憶效應。溫度感測器分析,PMMA上旋塗LPEI可以藉由載子遷移率的增加感測環境溫度,但是降溫後元件會衰退。
英文摘要 This thesis investigated the effect of gate dielectric buffer layers on the electrical characteristics of ambipolar organic field-effect transistors (OFETs) and their applications. The pentacene-based ambipolar OFETs with a linear polyethylenimine (LPEI) buffer layer on a polymethylmethacrylate (PMMA)/silicon dioxide main gate dielectric was examined. With the LPEI layer, the n-channel characteristics of the ambipolar OFETs were improved and the threshold voltage was reduced. The pentacene/LPEI interface had relatively low interfacial trap density and shorter mean interface trap time constant than the pentacene/PMMA interface. Therefore, the potential and general usage of the LPEI buffer layer for pentacene-based ambipolar OFETs can be expected to be used in electronics.
論文目次 中文摘要 I
Abstract III
誌謝 IX
目錄 X
表目錄 XIV
圖目錄 XVII
第1章 緒論 1
1-1 有機半導體材料簡介 1
1-2 有機薄膜電晶體概論 2
1-3 電晶體基本結構 2
1-4 電晶體操作原理 3
1-5 電晶體基本電特性 3
1-6 本論文之研究目的 6
第2章 實驗元件製程與分析儀器介紹 11
2-1 實驗材料介紹 11
2-2 實驗製程介紹 12
2-2-1 基板處理與清潔 12
2-2-2 介電層製作 12
2-2-3 半導體與電極製作 13
2-2-4 旋塗LPEI層 13
2-3 分析儀器介紹 13
2-3-1 半導體參數分析儀器(KEITHLEY 4200SCS) 13
2-3-2 精密阻抗分析儀(Agilent E4980A) 14
2-3-3 拉曼光譜儀 14
2-3-4 原子力顯微鏡(Atomic Force Microscope, AFM) 15
2-3-5 X光繞射儀(X-ray Diffractometer, XRD) 15
第3章 LPEI對雙極性有機薄膜電晶體之影響 17
3-1 前言 17
3-2 研究方法 17
3-3 Pentacene元件之電特性分析 18
3-3-1 導入LPEI層對Pentacene元件的影響 18
3-3-2 後處理對Pentacene元件的影響 20
3-4 LPEI對介電層的影響 23
3-4-1 電容與導納分析 23
3-4-2 表面能分析 25
3-4-3 拉曼光譜分析 26
3-5 結論 27
第4章 LPEI對雙極性有機薄膜電晶體之應用 55
4-1 前言 55
4-2 研究方法 56
4-3 光感測器之電性分析 57
4-4 光記憶體之電性分析 58
4-5 溫度感測器之電性分析 60
4-6 結論 63
第5章 總結與未來展望 108
參考文獻 110
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