Engineering Donor-Acceptor Conjugated Polymers for High-Performance and Fast-Response Organic Electrochemical Transistors

Authors

Hanyu Jia, Peking University
Zhen Huang, College of Chemistry and Molecular Engineering, Peking UniversityFollow
Peiyun Li, Peking University
Song Zhang, University of Southern MississippiFollow
Yunfei Wang, University of Southern MississippiFollow
Jie Yu Wang, College of Chemistry and Molecular Engineering, Peking UniversityFollow
Xiaodan Gu, University of Southern MississippiFollow
Ting Lei, Peking UniversityFollow

Document Type

Article

Publication Date

4-14-2021

Department

Chemistry and Biochemistry

School

Mathematics and Natural Sciences

Abstract

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.

Publication Title

Journal of Materials Chemistry C

Volume

9

Issue

14

First Page

4927

Last Page

4934

Recommended Citation

Jia, H., Huang, Z., Li, P., Zhang, S., Wang, Y., Wang, J., Gu, X., Lei, T. (2021). Engineering Donor-Acceptor Conjugated Polymers for High-Performance and Fast-Response Organic Electrochemical Transistors. Journal of Materials Chemistry C, 9(14), 4927-4934.
Available at: https://aquila.usm.edu/fac_pubs/18873