Abstract
Organic electrolyte-gated transistors (OEGTs) have the benefits of low power consumption and large current modulation. Nevertheless, the electrical performance of n-type OEGTs lags far behind that of p-type OEGTs. In this study, we design a series of polymers, P(NDITEG-T) and P(NDIMTEG-T), comprising a naphthalene diimide backbone for n-type charge transport and oligo(ethylene glycol) (OEG) side chains for high ionic conductivity and eco-friendly solution processing. The incorporation of the OEG chain facilitates the electrochemical doping of the semiconductor by ions to realize high-performance, n-type OEGTs. Notably, in OEGTs, P(NDITEG-T) achieves a high electron mobility of 1.0 × 10−1 cm2 V−1 s−1, which represents the highest value reported for solution-processed, n-type OEGTs. It is noted that the fabrication of the OEGTs is achieved by solution processing with eco-friendly ethanol/water mixtures in virtue of the hydrophilic OEG chains. This work demonstrates the molecular design of the P(NDITEG-T) polymer and its significant ability to produce aqueous-processable, high-performance, and n-type OEGTs.
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Acknowledgements
This work was supported by the Materials & Components Technology Development Program (20006537, Development of High Performance Insulation Materials for Flexible OLED Display TFT), the Ministry of Trade, Industry & Energy (MOTIE, Republic of Korea), and the grant from the Ministry of SMEs and Startups of the Korean Government (1425144083). We acknowledge the support by National Research Foundation of Korea (NRF) Grant of the Korean Government (2017M3A7B8065584).
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Aqueous-Processable, Naphthalene Diimide-Based Polymers for Eco-Friendly Fabrication Of High-Performance, n-Type Organic Electrolyte-Gated Transistors
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Jeong, D., Kim, M.J., Lee, S. et al. Aqueous-processable, naphthalene diimide-based polymers for eco-friendly fabrication of high-performance, n-type organic electrolyte-gated transistors. Sci. China Chem. 65, 973–978 (2022). https://doi.org/10.1007/s11426-021-1212-5
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DOI: https://doi.org/10.1007/s11426-021-1212-5