p-Type Organic Thin Film Transistors Based on Biphenyl and Fluorene End-Capped Fused Bithiophenes = Biphenyl과 Fluorene 구조를 포함한 Thiophene 유도체를 이용한 유기물 박막 트랜지스터

다국어 초록 (Multilingual Abstract)

We report on high performance and stable novel p-type active oligomers for organic thin film transistors based on a structural combination of fused bithiophene with fluorene or biphenyl unit. A higher field-effect mobility and device stability after UV irradiation was achieved with biphenyl end-capped fused bithiophene (BPTT) than the fluorene end-capped derivative (BFTT). Moreover, it is noteworthy that both molecules, especially BPTT, showed a high performance, almost the same or a slight decrease in field effect mobility and I_(ON)/T_(OFF), even after they were kept under ambient conditions for more than one month.