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研究生: 吳承祐
Wu, Chang-Yo
論文名稱: 電極與介電層對正負型有機五環素 場效電晶體影響
The influence of electrodes and dielectric layers on P- and N-type pentacene-based organic field-effect transistors
指導教授: 黃榮俊
Huang, J. C. A.
學位類別: 碩士
Master
系所名稱: 理學院 - 光電科學與工程研究所
Institute of Electro-Optical Science and Engineering
論文出版年: 2009
畢業學年度: 97
語文別: 中文
論文頁數: 117
中文關鍵詞: 五環素場效電晶體烴基電子捕捉介電層不對稱電極
外文關鍵詞: pentacene OFET, gate dielectric, electrodes
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  • 本論文討論電極與介電層對於正負型有機五環素場效電晶體的影響,在介電層材料的選擇上,主要以有烴基和無烴基的結構不同來比較,有無清基會造成電子的捕捉能力不同,影響介電層與主動層之間感應的通道;而在電極的部分,使用不同功函數金屬做為電極,根據注入電子電洞的能力不同,使元件有操作正負型差別。討論此兩種介電層以及電極的部分,目的是為了選用適當的介電層可以改變場效電晶體操作正型或負型;而將不同功函數金屬做出不對稱電極元件,有機會可以做出發光場效電晶體。

    In the present study, gate dielectric and electrodes are an important criterion in fabricated pentacene organic field-effect transistors (OFETs). Most of the reports about pentacene are usually use in the P-type organic field-effect transistors.In our work, incorporating a poly styrene polymer interfacial film as gate dielectric and calcium as electrode causes the pentacene-based OFETs to exhibit effective N-channel.
    We used pentacene as active layer of OFETs with poly styrene polymer and several kinds of source-drain electrodes. To study the characteristics ambipolar of pentacene-based OFETs

    摘要 ............................................................................................ I Abstract ...................................................................................... II 致謝 .......................................................................................... III 目錄 .......................................................................................... IV 圖目錄 .................................................................................... VII 第一章 緒論 ............................................................................ 1 1-1 有機場效電晶體演進 ..................................................... 1 1-2 有機場效電晶體雙載子特性 ......................................... 6 1-3 研究動機與大綱 ............................................................. 8 1-3-1 研究動機 ............................................................... 8 1-3-2 研究大綱 ............................................................. 10 第二章 有機場效電晶體簡介 .............................................. 11 2-1 有機材料的選擇 ............................................................ 11 V 2-2 有機半導體傳導機制 ................................................... 16 2-2-1 能帶分析 ............................................................. 16 2-2-2 導電機制 ............................................................. 17 2-2-3 導電方式 ............................................................. 18 2-3 有機場效電晶體原理與特性 ....................................... 23 2-3-1 場效電晶體原件結構與工作原理 ...................... 23 2-3-2 電壓-電流特性 .................................................... 25 2-3-3 閘極介電層影響 ................................................. 26 2-3-4 電極的影響 ......................................................... 27 2-4 有機場效電晶體雙載子特性 ....................................... 30 2-4-1 組件特性 ............................................................. 30 2-4-2 電壓-電流特性方程式 ........................................ 31 第三章 元件製作與實驗步驟 .............................................. 34 3-1 組件簡介 ....................................................................... 34 3-2 實驗組件製作 ............................................................... 36 3-2-1 ITO玻璃基板的閘極圖案化 .............................. 36 3-2-2 閘極介電層製作 ................................................. 39 3-2-3 主動層-有機半導體層製作 ................................ 40 V I 3-3-4 源極及汲極之電極製作...................................... 41 3-3-5 組件量測 ............................................................. 42 第四章 介電層對正負型有機場效電晶體影響 .................. 50 4-1 介電層材料有無氫氧根(OH基)的比較 ..................... 50 4-1-1 含氫氧根高分子介電層...................................... 51 4-1-2 無氫氧根高分子介電層...................................... 58 4-1-3 氫氧根多寡介電層對於場效電晶體的影響 ...... 63 4-1-4 有無氫氧根對於場效電晶體的影響 .................. 70 4-2 在不同化學結構上的OH基對於場效電晶體的影響 75 4-2-1 碳鏈上的OH基做為介電層 .............................. 75 4-2-2 OH基的解離程度對於元件特性影響 ............... 79 第五章 電極對正負型有機場效電晶體影響 ...................... 87 5-1 金、鈣不對稱電極 ....................................................... 87 5-1-1 源極-汲極不對稱電極[金/鈣、鈣] .................. 88 5-1-2 源極-汲極不對稱電極[金、鈣] ....................... 95 5-1-3 電極對場效電晶體的影響 ................................ 100 V II 5-2 金、鈣複合電極 ........................................................... 97 第六章 結論與未來研究建議 ............................................ 109 參考文獻 ................................................................................ 112

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