高分子介電材料在噴墨噴印技術之表面形態研究以及在有機薄膜電晶體之應用

Abstract

液珠成膜後的表面形態是噴墨列印技術中一項非常重要的關鍵。對高分子介電材料來說，本篇論文提出了由溶解度參數所主導的咖啡環效應抑制模型，來控制其噴印後液珠的形態。其中溶解度參數可以由物質的Hildebrand參數來估算。另外為了改善噴塗線以及膜的表面型態，本論文提出了液珠間距優化的方法，以避免間距過大產生導致液珠不連續或是間距過小導致膨脹效應。而利用上述方法所噴塗的元件，其載子遷移率可以達到0.12cm2/Vs，這些結果顯示我們的方法可以有效的應用在噴墨製程的電晶體上面。

When an inkjet printed deposit is formed, the topography of the droplet on the substrate is of great importance. In order to achieve the droplet geometric controllable process for polymeric dielectrics, a solubility dominated model for suppressing the coffee ring effect was proposed and demonstrated. The solubility can be evaluated by Hildebrand solubility parameter. Line and film with improved morphological control were achieved using the drop spacing optimized method. Printed line and film using this approach can avoid individual droplets and bulge effect. For the electrical performance of printed device, the mobility is of as high as 0.12cm2/Vs. These results demonstrate that our methods are potential to be utilized for fabrication of printed OTFTs.