溶液製程法用於有機半導體元件是具有發展大面積、低成本的電子元件潛力，在我們的研究中，探討一系列不同碳鏈長度之dicyanomethylene-substituted quinoidal dithienothiophene (DTTRQ)小分子材料，藉由分子設計碳鏈長度使樣品能適用於溶液製程，並且探討材料應用於有機場效應電晶體元件上的電性以及此新型小分子排列，此實驗中利用溶液法中的剪切力塗佈法製作有機場效應電晶體元件，元件效能最高可以達到電子遷移率0.45 cm2V-1s-1，同時將DTTRQ系列之材料所製作的元件置於大氣環境中一個月以上仍有維持一定的電性，並且在多次給予電壓量測元件後電性幾乎沒有影響，顯示出好的環境以及偏壓穩定性，我們利用光學顯微鏡 (OM)、紫外線-可見光光譜儀 (UV-Vis)、原子力學顯微鏡 (AFM)以及低掠角廣角X光繞射儀 (GIWXD)來觀察碳鏈長度對電晶體元件效能的關係。;Solution deposition of organic semiconductors shows great potential for the production on large-area and low-cost organic electronics. In our work, a series of dicyanomethylene-substituted quinoidal dithienothiophene (DTTRQ), in which the different alkyl chain lengths are introduced, are strategically designed for solution-processable organic semiconductors. The electrical properties as well as molecular packing of these new organic small molecules are investigated. The organic field effect transistor (OFET) through solution-sheared DTTRQ displays the highest electron mobility of ~ 0.45 cm2V-1s-1. DTTRQ shows good environmental stability for at least 1 month and stable electrical bias stability. We will use UV-Vis, optical microscopic, atomic force microscopic, GIWXD to establish the relationship between alky chain lengths and the electrical performance.
