Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 32, Issue 27, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.202201593
Keywords
ethylene glycol side chains; neuromorphic devices; non-fused donor-acceptor conjugated polymers; organic electrochemical transistors
Categories
Funding
- European Union [802615]
- National Natural Science Foundation of China [61620106016/61835009/61775145]
- China Postdoctoral Science Foundation Funded Project [2020M672771]
- Guangdong Basic and Applied Basic Research Foundation [2020A1515110636]
- Netherlands Ministry of Education, Culture and Science [024.001.035]
- Zernike Institute for Advanced Materials
- China Scholarship Council (CSC) [201606340158]
- Max Planck Institute of Polymer Research [MPIPICMS2019001]
- Institute for Complex Molecular Systems (ICMS), Eindhoven University of Technology [MPIPICMS2019001]
- European Research Council (ERC) [802615] Funding Source: European Research Council (ERC)
Ask authors/readers for more resources
Organic electrochemical transistors (OECTs) are widely used in low power circuits, biosensors, and neuromorphic computing. However, the choice of high-performance n-type polymers for OECTs is limited. This study reports on three non-fused, planar polymer materials with increasing polar side chains, which improve the OECT performance. The research demonstrates that the performance of OECTs increases with the number of polar side chains, resulting in higher hydrophilicity and electron affinities.
Organic electrochemical transistors (OECTs) have emerged as building blocks for low power circuits, biosensors, and neuromorphic computing. While p-type polymer materials for OECTs are well developed, the choice of high-performance n-type polymers is limited, despite being essential for cation and metabolite biosensors, and crucial for constructing complementary circuits. N-type conjugated polymers that have efficient ion-to-electron transduction are highly desired for electrochemical applications. In this contribution, three non-fused, planar naphthalenediimide (NDI)-dialkoxybithiazole (2Tz) copolymers, which systematically increase the amount of polar tri(ethylene glycol) (TEG) side chains: PNDI2OD-2Tz (0 TEG), PNDIODTEG-2Tz (1 TEG), PNDI2TEG-2Tz (2 TEG), are reported. It is demonstrated that the OECT performance increases with the number of TEG side chains resulting from the progressively higher hydrophilicity and larger electron affinities. Benefiting from the high electron mobility, excellent ion conduction capability, efficient ion-to-electron transduction, and low-lying lowest unoccupied molecular orbital energy level, the 2 TEG polymer achieves close to 10(5) on-off ratio, fast switching, 1000 stable operation cycles in aqueous electrolyte, and has a long shelf life. Moreover, the higher number TEG chain substituted polymer exhibits good conductance state retention over two orders of magnitudes in electrochemical resistive random-access memory devices, highlighting its potential for neuromorphic computing.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available