TY - JOUR
T1 - Asymmetric side-chain engineering of conjugated polymers with improved performance and stability in organic electrochemical transistors
AU - Jiang, Guo Hao
AU - Li, Chia Ying
AU - Su, Shang Wen
AU - Lin, Yan Cheng
N1 - Publisher Copyright:
© 2024 The Royal Society of Chemistry.
PY - 2024/7/11
Y1 - 2024/7/11
N2 - This study rigorously investigated the impact of asymmetric side chain design on the performance of organic electrochemical transistors (OECTs). Hydrophilic and hydrophobic side chains were systematically introduced into poly(isoindigo-bithiophene)-based polymers, and the resulting symmetric and asymmetric side chain combinations were carefully compared. The objective was to enhance coplanarity, mobility, hydrophilicity, and stability to improve OECT device performance. While P(C,C) and P(O,O), with symmetric branched alkyl and oligoether side chains, exhibit effective OECT device functions, the asymmetric side-chain designed P(C,O), with branched alkyl and oligoether side chains, outperforms both symmetric counterparts. P(C,O) demonstrates OECT performance with a pronounced product of mobility and capacitance (μhC*) of 65.2 F cm−1 V−1 s−1, excellent hole mobility (μh) of 0.78 cm2 V−1 s−1, and fast response speed. Specifically, P(C,O) demonstrates superior stability while maintaining good capacitance. The performance retention of P(C,O) after consecutive ON/OFF cycles is 77.5%, which is much higher than 35.2% and 47.0% of P(C,C) and P(O,O). The asymmetric structure contributes to enhancing coplanarity and structural stability, resulting in improved crystalline properties after electrolyte swelling. This study presents a balanced and rigorous approach to balancing the performance and stability in OECTs through asymmetric side chain design.
AB - This study rigorously investigated the impact of asymmetric side chain design on the performance of organic electrochemical transistors (OECTs). Hydrophilic and hydrophobic side chains were systematically introduced into poly(isoindigo-bithiophene)-based polymers, and the resulting symmetric and asymmetric side chain combinations were carefully compared. The objective was to enhance coplanarity, mobility, hydrophilicity, and stability to improve OECT device performance. While P(C,C) and P(O,O), with symmetric branched alkyl and oligoether side chains, exhibit effective OECT device functions, the asymmetric side-chain designed P(C,O), with branched alkyl and oligoether side chains, outperforms both symmetric counterparts. P(C,O) demonstrates OECT performance with a pronounced product of mobility and capacitance (μhC*) of 65.2 F cm−1 V−1 s−1, excellent hole mobility (μh) of 0.78 cm2 V−1 s−1, and fast response speed. Specifically, P(C,O) demonstrates superior stability while maintaining good capacitance. The performance retention of P(C,O) after consecutive ON/OFF cycles is 77.5%, which is much higher than 35.2% and 47.0% of P(C,C) and P(O,O). The asymmetric structure contributes to enhancing coplanarity and structural stability, resulting in improved crystalline properties after electrolyte swelling. This study presents a balanced and rigorous approach to balancing the performance and stability in OECTs through asymmetric side chain design.
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U2 - 10.1039/d4tc02135e
DO - 10.1039/d4tc02135e
M3 - Article
AN - SCOPUS:85199529722
SN - 2050-7526
VL - 12
SP - 11752
EP - 11762
JO - Journal of Materials Chemistry C
JF - Journal of Materials Chemistry C
IS - 31
ER -