| 초록 |
Recent researches have been devoted to developing new organic semiconducting materials and coating process techniques for achieving high performance organic thin film transistors (OTFTs). Although various thin film coating techniques have been developed, there are still challenges for fabricating large-area and highly-crystalline semiconductor films with high uniformity. Among the various coating processes, a wire-bar coating is considered as a promising technique for organic semiconductor thin films due to its high uniformity and reproducibility. Here, we introduced the wire-bar coating to fabricate highly-aligned small molecule organic semiconductor (2,7-dioctyl[1]benzothieno[3,2-b][1]benzothiophene, C8-BTBT) films. We fabricated the large-area OTFT arrays which exhibit superior charge carrier mobility with high uniformity and reproducibility. The correlation between process conditions and crystal size was observed, and a crystallization mechanism of bar-coated films was identified. |
