自組裝聚雙炔基衍生物分子膜共軛方向控制及其場效電晶體性能之研究

Conjugate alignment control of the molecular film of self-assembled polydiacetylenic derivatives and its applications in field-effect transistors

張睿言(Jui-Yan Chang)

指導教授 ： 陶雨台 ； 陳銘洲

國立中央大學/理學院/化學系/碩士(2011年)

摘要

雙炔基衍生物具有照光聚合特性，我們於實驗中利用雙炔基衍生物(9,11-tetracosadiynoic acid 、10,12-pentacosadiynoic acid、11,13-hexacosadiynoic acid...等)溶於有機溶劑中，並將矽晶片以特定角度浸泡於溶液中，利用溶液由矽晶片退去表面同時溶劑揮發的方向性外力，將雙炔基衍生物製作成有方向性薄膜於矽晶片上，照光聚合而獲得一方向性共軛鏈，並應用於製備有機場效電晶體。另一部份我們也分析該液相成膜系統中，影響有機分子成膜性的因素如濃度、溶劑、蒸氣壓、官能基…等。結果顯示以乙酸乙酯為溶劑，在適當拉出速度下，能得到最具方向性之均勻薄膜。
將聚雙炔基衍生物薄膜利用於有機場效電晶體的半導體層，我們獲得共軛鏈與非共軛鏈電性差異，在載子遷移率(mobility)的部分共軛鏈約等於0.0586 cm2/Vs而非共軛鏈則約為0.0225 cm2/Vs，以此驗證共軛方向所影響的電性效益。

關鍵字

場效電晶體 ； 聚雙炔基 ； 共軛方向控制 ； 自組裝

並列摘要

Diacetylenic derivatives show the characteristics of topochemical polymerization upon UV-irradiation . In this work, the diacetylenic derivatives(9,11-tetracosadiynoic acid 、10,12-pentacosadiynoic acid、11,13-hexacosadiynoic acid...) were dissolved in different organic solvents ,with a silicon wafer withdraw from the solution at a specific angle ,to prepare oriented polydiacetylene films , paraments such as , concentration、solvent type、solvent vapor pressure、functional group on the film-forming process were analysed . The results show that with ethyl acetate as solvent , smooth and oriented films can be obtained by adjusting the withdrawing speed .
Oriented polydiacetylene films were used as the semiconductor channel in field effect transistors ,and anisotropic electrical properties were measured along the conjugation direction versus other directions , with a mobility about 0.0586 cm2/Vs along the conjugation direction and 0.0225 cm2/Vs along direction perpendicular to the conjugation .

並列關鍵字

self-assemble ； field-effect transistors ； polydiacetylene ； conjugation alignment

參考文獻

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