研究生: |
陳坤暘 |
---|---|
論文名稱: |
有機薄膜電晶體之高分子閘極介電層研究 Studies of Polymer Gate Dielectrics in Organic Thin Film Transistors |
指導教授: |
金惟國教授
何家充博士 |
口試委員: | |
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: | 2004 |
畢業學年度: | 92 |
語文別: | 中文 |
論文頁數: | 82 |
中文關鍵詞: | 五環素 、介電層 、高分子 、有機薄膜電晶體 |
外文關鍵詞: | pentacene, gate dielectric, polymer, OTFT |
相關次數: | 點閱:2 下載:0 |
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本論文利用旋轉塗佈技術製作高分子薄膜,並以蒸鍍方式完成有機半導體pentacene,觀察pentacene成長與高分子基材間的關係,接著利用選擇適當的高分子PMMA作為OTFT之有機介電層,製作元件。
實驗結果,發現粗糙度是影響結晶成長的首要因素,其次為高分子的親疏水性,越疏水的表面和pentacene的親合力越佳,因此成核點越多,使得結晶無法連續成長,而太親水的表面,會在蒸鍍時,因累積過多的分子蒸氣在高分子基材上而又缺少適當的成核點,使得pentacene開始雜亂地結晶下來,所以pentacene晶粒較小且其與親水性表面的接著也較差。因此,唯有在適當親疏水性的表面,提供pentacene適當的成核點使其成長,才有較大結晶的出現。最後,發現在較為疏水性的表面上,pentacene分子為水平於基板排列,且和基板表面的接合性較佳。
選用PMMA作為OTFT元件之閘極介電層,元件採用下閘極、下接觸式的結構,並以ITO作為電極,實驗結果得到元件之載子遷移率在10-3等級,而Ion/Ioff為103。
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