Solution-Shearing-Method을 이용한 C8-BTBT 기반의 고성능 유기 TFT 제작에 관한 연구

Abstract

Organic thin-film transistors (OTFTs) wherein organic semiconductors used as active layer have attacted significant interests because of their solubility to be applied to low-cost printing technology and advantages of mechanical flexibility for flexible electronics. A promising class of organic materials for high performance TFTs is based on solution-processable small-moleucle semiconductor such as Tips-pentacene, TES-ADT and C8-BTBT. Among these promising materials, especially, C8-BTBT has excellent self-organizing properties and fluidity. These are beneficial to form a thin-film with improved crystallinity and allowed the fabrication of high performace OTFTs in terms of field-effect mobility value. In this thesis, we demonstrate a fabrication of C8-BTBT based OTFTs with Solution-Shearing-Method that can be used to tune the molecular packing and crystalline texture of small-molecule semiconductors. By using the Solution-Shearing-Method, we obtatined reasonably high-performance C8-BTBT based TFTs with on/off ratio of >107, mobility of up to 0.516 cm2/Vs.