| Institution: | 1. College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai, 201620 China
Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, 199 Renai Road, Suzhou, 215123 China;2. College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai, 201620 China;3. Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, 199 Renai Road, Suzhou, 215123 China;4. School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou, 510275 China |
| Abstract: | Hydrophobic conjugated polymers have poor ionic transport property, so hydrophilic side chains are often grafted for their application as organic electrochemical transistors (OECTs). However, this modification lowers their charge transport ability. Here, an ionic gel interfacial layer is applied to improve the ionic transport while retaining the charge transport ability of the polymers. By using the ionic gels comprising gel matrix and ionic liquids as the interfacial layers, the hydrophobic polymer achieves the OECT feature with high transconductance, low threshold voltage, high current on/off ratio, short switching time, and high operational stability. The working mechanism is also revealed. Moreover, the OECT performance can be tuned by varying the types and ratios of ionic gels. With the proposed ionic gel strategy, OECTs can be effectively realized with hydrophobic conjugated polymers. |
