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학술지 Electrically Stable Polymer-only Dielectrics for Organic Field-effect Transistors with Low Gate Leakage Current
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저자
남수지, 정용진, 장재영
발행일
202010
출처
Organic Electronics, v.85, pp.1-5
ISSN
1566-1199
출판사
Elsevier
DOI
https://dx.doi.org/10.1016/j.orgel.2020.105828
협약과제
20PB1800, 플렉시블 OLED 디스플레이용 산화물 TFT를 위한 고특성 습식 절연소재 및 공정기술 개발, 남수지
초록
© 2020 Elsevier B.V. Organic-only dielectric films are needed for several electronic applications, particularly in organic field-effect transistors (OFETs). Here, cyclic olefin copolymer (COC) films with the thickness on the order of 100 nm are reported as satisfactory dielectric layers for high-performance and reliable OFETs. The COC dielectric film has a high glass-transition temperature and low free volume, which contribute to its superior insulating properties and high dielectric strength. Moreover, the smooth surface morphology and low surface energy of the COC film are responsible for the formation of highly crystalline structures of the overlying pentacene molecules. Finally, the OFETs with the COC dielectric layers are found to exhibit charge-carrier mobilities up to 1.075 짹 0.05 cm2/V and on/off ratios exceeding 106 while displaying low gate leakage current and negligible hysteresis.
키워드
Cyclic olefin copolymer, Dielectric, Leakage current, Organic field-effect transistor (OFET), Solution process
KSP 제안 키워드
Carrier mobility, Crystalline structure, Dielectric films, Dielectric strength, Field-effect transistors(FETs), Free Volume, High dielectric, High performance, Insulating properties, Organic field-effect, Smooth surface