https://scholars.lib.ntu.edu.tw/handle/123456789/631483
標題: | Stretchable diketopyrrolopyrrole-based conjugated polymers with asymmetric sidechain designs for field-effect transistor applications | 作者: | Chueh, Pin Hsiang Chang, Chih Yuan Lin, Yen Cheng Chen, Wen‑Chang C. CHU-CHEN CHUEH |
關鍵字: | Asymmetric sidechain design | Bimodal stacking | Diketopyrrolopyrrole-based conjugated polymers | Stretchability | Transistor | 公開日期: | 1-十一月-2022 | 出版社: | ELSEVIER | 卷: | 140 | 來源出版物: | Journal of the Taiwan Institute of Chemical Engineers | 摘要: | Background: The asymmetric sidechain design has been recently proposed as a potential strategy to improve the mobility-stretchability property of conjugated polymers. In this study, the influences of the asymmetric sidechain designs on the mobility-stretchability properties of DPP-based conjugated polymers are investigated. Three asymmetric sidechain combinations based on a linear alkyl chain (C12), a carbosilane chain (Si), and a siloxane-terminated chain (SiO) are designed to synthesize three polymers, P(SiO-C12), P(Si-C12), and P(SiO-Si). Methods: All polymers are synthesized via Stille coupling in a microwave reactor. Their basic properties including size exclusion chromatography (SEC), thermogravimetric analysis (TGA), and differential scanning calorimetry (DSC) are analyzed. Their optical and electrochemical properties are characterized using UV-vis absorption and cyclic voltammetry (CV). The morphology of the polymer films is analyzed through optical microscopy (OM), atomic force microscopy (AFM), and grazing-incidence X-ray diffraction (GIXD). Lastly, the transistor characteristics are measured using a Keithley 4200-SCS semiconductor parameter analyzer (Keithley Instruments Inc.) inside a N2-filled glove box. Significant findings: The asymmetric SiO/Si sidechain combination enables P(SiO-Si) possess the highest degree of bimodal packing orientation because their branched geometries impose a large steric hindrance to disrupt the chain packing. As benefitting from such bimodal packing orientation, P(SiO-Si) is shown to deliver the highest hole mobility value and the best mobility-stretchability property among these three polymers. It can persist 56.7% of the initial μh value after 800 cycles of 60% strain while P(SiO-C12) and P(Si-C12) can only maintain 2.4% and 4.1% of the initial value. Our results clearly highlight the advantage of the asymmetric SiO/Si sidechain combination on improving the mobility-stretchability property of the derived polymer. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/631483 | ISSN: | 18761070 | DOI: | 10.1016/j.jtice.2022.104566 |
顯示於: | 化學工程學系 |
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