Imperial College London
Alternate

ProfessorJi-SeonKim

Faculty of Natural Sciences, Department of Physics

Professor of Solid State Physics
 
 
 
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Contact

 

+44 (0)20 7594 7597ji-seon.kim

 
 
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Location

 

B909Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Tan:2022:10.1002/adma.202202574,
author = {Tan, E and Kim, J and Stewart, K and Pitsalidis, C and Kwon, S and Siemons, N and Kim, J and Jiang, Y and Frost, JM and Pearce, D and Tyrrell, JE and Nelson, J and Owens, RM and Kim, Y-H and Kim, J-S},
doi = {10.1002/adma.202202574},
journal = {Advanced Materials},
title = {The role of long-alkyl-group spacers in glycolated copolymers for high performance organic electrochemical transistors},
url = {http://dx.doi.org/10.1002/adma.202202574},
volume = {34},
year = {2022}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Semiconducting polymers with oligoethylene glycol sidechains have attracted strong research interest for organic electrochemical transistor (OECT) applications. However, key molecular design rules for high-performance OECTs via efficient mixed electronic/ionic charge transport are still unclear. Herein, we synthesize and characterize new glycolated copolymers (gDPP-TTT and gDPP-TTVTT) with diketopyrrolopyrrole (DPP) acceptor and thiophene-based (TTT or TTVTT) donor units for accumulation mode OECTs, where a long-alkyl-group (C12 ) attached to DPP unit acts as a spacer distancing the oligoethylene glycol from the polymer backbone. gDPP-TTVTT shows the highest OECT transconductance (61.9 S cm-1 ) and high operational stability, compared to gDPP-TTT and their alkylated counterparts. Surprisingly, gDPP-TTVTT also shows high electronic charge mobility in field-effect transistor, suggesting efficient ion injection/diffusion without hindering its efficient electronic charge transport. The elongated donor unit (TTVTT) facilitates the hole polaron formation more localized to the donor unit, leading to faster and easier polaron formation with less impact on polymer structure during OECT operation, as opposed to the TTT unit. This is supported by molecular dynamics (MD) simulation. We conclude that these simultaneously high electronic and ionic charge transport properties are achieved due to the long-alkyl-group spacer in amphipathic sidechains, providing an important molecular design rule for glycolated copolymers. This article is protected by copyright. All rights reserved.
AU  - Tan,E
AU  - Kim,J
AU  - Stewart,K
AU  - Pitsalidis,C
AU  - Kwon,S
AU  - Siemons,N
AU  - Kim,J
AU  - Jiang,Y
AU  - Frost,JM
AU  - Pearce,D
AU  - Tyrrell,JE
AU  - Nelson,J
AU  - Owens,RM
AU  - Kim,Y-H
AU  - Kim,J-S
DO  - 10.1002/adma.202202574
PY  - 2022///
SN  - 0935-9648
TI  - The role of long-alkyl-group spacers in glycolated copolymers for high performance organic electrochemical transistors
T2  - Advanced Materials
UR  - http://dx.doi.org/10.1002/adma.202202574
UR  - https://www.ncbi.nlm.nih.gov/pubmed/35474344
UR  - https://onlinelibrary.wiley.com/doi/10.1002/adma.202202574
UR  - http://hdl.handle.net/10044/1/96962
VL  - 34
ER  -
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