The Role of Long-Alkyl-Group Spacers in Glycolated Copolymers for High Performance Organic Electrochemical Transistors.
Authors
Tan, Ellasia
Kim, Jingwan
Stewart, Katherine
Pitsalidis, Charalampos
Kwon, Sooncheol
Siemons, Nicholas
Kim, Jehan
Jiang, Yifei
Frost, Jarvist M
Pearce, Drew
Tyrrell, James E
Nelson, Jenny
Kim, Yun-Hi
Kim, Ji-Seon
Publication Date
2022-04-26Journal Title
Adv Mater
ISSN
0935-9648
Pages
e2202574
Type
Article
This Version
AM
Physical Medium
Print-Electronic
Metadata
Show full item recordCitation
Tan, E., Kim, J., Stewart, K., Pitsalidis, C., Kwon, S., Siemons, N., Kim, J., et al. (2022). The Role of Long-Alkyl-Group Spacers in Glycolated Copolymers for High Performance Organic Electrochemical Transistors.. Adv Mater, e2202574. https://doi.org/10.1002/adma.202202574
Abstract
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.
Keywords
accumulation mode, amphipathic sidechain, conjugated polymer, long-alkyl-group spacer, organic electrochemical transistor (OECT)
Embargo Lift Date
2023-04-26
Identifiers
External DOI: https://doi.org/10.1002/adma.202202574
This record's URL: https://www.repository.cam.ac.uk/handle/1810/337140
Statistics
Total file downloads (since January 2020). For more information on metrics see the
IRUS guide.
Recommended or similar items
The current recommendation prototype on the Apollo Repository will be turned off on 03 February 2023. Although the pilot has been fruitful for both parties, the service provider IKVA is focusing on horizon scanning products and so the recommender service can no longer be supported. We recognise the importance of recommender services in supporting research discovery and are evaluating offerings from other service providers. If you would like to offer feedback on this decision please contact us on: support@repository.cam.ac.uk