https://scholars.lib.ntu.edu.tw/handle/123456789/625168
標題: | Thermally and Mechanically Stable Polyimides as Flexible Substrates for Organic Field-Effect Transistors | 作者: | Chen, C.-K. Lin, Y.-C. Miyane, S. Ando, S. Ueda, M. WEN-CHANG CHEN |
關鍵字: | field-effect transistor; heterocyclic ring; polyimide; substrate; thermal-mechanical resistance | 公開日期: | 2020 | 卷: | 2 | 期: | 8 | 起(迄)頁: | 3422-3432 | 來源出版物: | ACS Applied Polymer Materials | 摘要: | Highly thermal-mechanical stable polymers have attracted extensive research interest as substrates for flexible or wearable electronic devices, such as polyimides (PIs). Here, we report a class of PIs as substrates for flexible organic field-effect transistors (OFETs), prepared by the polycondensation of pyromellitic dianhydride (PMDA) or 3,3′,4,4′-biphenyltetracarboxylic acid dianhydride (BPDA) with three kinds of heterocyclic diamines, including 2,6-diaminothianthrene (SSDA), 2,6-diaminophenoxathiin (SODA), and 2,6-diaminodibenzo-p-dioxin (OODA). Flexible and tough PI films were obtained with a very low coefficient of thermal expansion (CTE) down to 7.3 ppm K-1. Furthermore, the copolymers of PI(OODA-PmBn) prepared from PMDA and BPDA with OODA could exhibit an extremely low CTE of 5.5 ppm K-1 (PI(OODA-P5B5)) without an observed Tg up to 400 °C, which was attributed to the suitable polymer chain rigidity and packing resulting in better in-plane orientation. Finally, this superheat-resistant PI(OODA-P5B5) was applied as the substrate in flexible OFETs, showing compatible and stable device performance even after being baked at 200 °C for 2 h or bended for 1000 cycles. These results indicate that the designed super-thermal-mechanically stable polyimides have potential applications as substrates for flexible electronics. Copyright © 2020 American Chemical Society. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85093694717&doi=10.1021%2facsapm.0c00488&partnerID=40&md5=25cd4618af99add20ba173c7f9fefac7 https://scholars.lib.ntu.edu.tw/handle/123456789/625168 |
ISSN: | 26376105 | DOI: | 10.1021/acsapm.0c00488 | SDG/關鍵字: | Flexible electronics; Organic field effect transistors; Polyimides; Thermal expansion; Device performance; Electronic device; Flexible substrate; In-plane orientation; Low coefficient of thermal expansions; Mechanically stable; Pyromellitic dianhydride; Research interests; Substrates |
顯示於: | 化學工程學系 |
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