Engineering donor–acceptor conjugated polymers for high-performance and fast-response organic electrochemical transistors

Jia, Hanyu; Huang, Zhen; Li, Peiyun; Zhang, Song; Wang, Yunfei; Wang, Jie-Yu; Gu, Xiaodan; Lei, Ting

doi:10.1039/d1tc00440a

Engineering donor–acceptor conjugated polymers for high-performance and fast-response organic electrochemical transistors

Journal Article · Mon Mar 15 00:00:00 EDT 2021 · Journal of Materials Chemistry C

DOI:https://doi.org/10.1039/d1tc00440a· OSTI ID:1853113

^[1]; ^[2]; ^[2]; ^[3]; ^[3]; Wang, Jie-Yu ^[2]; ^[3]; ^[2]

Peking Univ., Beijing (China); Zhengzhou Univ. (China); OSTI
Peking Univ., Beijing (China)
Univ. of Southern Mississippi, Hattiesburg, MS (United States)

To date, high-performance organic electrochemical transistors (OECTs) have mostly been based on polythiophene systems. Donor–acceptor (D–A) conjugated polymers are expected to be promising materials for OECTs owing to their high mobility and comparatively low crystallinity (good for ion diffusion). However, the OECT performance of D–A polymers lags far behind that of the polythiophenes. Here we synergistically engineered the backbone and side chain of a series of diketopyrrolopyrrole (DPP)-based D–A polymers and found that redox potential, molecular weight, solution processability, and film microstructures all have a severe impact on their performance. After systematic engineering, P(bgDPP-MeOT2) exhibited the best figure-of-merit (μC*) of 225 F cm^-1 V^-1 s^-1, amongst the highest performance of the reported D–A polymers. Besides, the DPP polymers exhibited high hole mobility of over 1.6 cm² V^-1 s^-1, leading to fast response OECTs with a record low turn-off response time of 30 μs. The polymer also exhibited good operation stability with a current retention of 98.8% over 700 electrochemical switching cycles. This work reveals the complexity and systematicness in the development of D–A polymer based high-performance OECTs.

View Accepted Manuscript (DOE)

Research Organization:: Univ. of Southern Mississippi, Hattiesburg, MS (United States); University of Southern Mississippi, Hattiesburg, MS (United States)

Sponsoring Organization:: Beijing Natural Science Foundation; Key-Area Research and Development Program of Guangdong Province; National Natural Science Foundation of China; Open Fund of the State Key Laboratory of Luminescent Materials and Devices; USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0019361

OSTI ID:: 1853113

Alternate ID(s):: OSTI ID: 1865538
OSTI ID: 1773524
OSTI ID: 1985338

Journal Information:: Journal of Materials Chemistry C, Journal Name: Journal of Materials Chemistry C Journal Issue: 14 Vol. 9; ISSN 2050-7526

Publisher:: Royal Society of ChemistryCopyright Statement

Country of Publication:: United States

Language:: English

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Engineering donor–acceptor conjugated polymers for high-performance and fast-response organic electrochemical transistors

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