The Role of Long-Alkyl-Group Spacers in Glycolated Copolymers for High-Performance Organic Electrochemical Transistors
Autor: | Ellasia Tan, Jingwan Kim, Katherine Stewart, Charalampos Pitsalidis, Sooncheol Kwon, Nicholas Siemons, Jehan Kim, Yifei Jiang, Jarvist M. Frost, Drew Pearce, James E. Tyrrell, Jenny Nelson, Roisin M. Owens, Yun‐Hi Kim, Ji‐Seon Kim |
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Přispěvatelé: | Engineering and Physical Sciences Research Council, Commission of the European Communities, Owens, Roisin [0000-0001-7856-2108], Apollo - University of Cambridge Repository |
Rok vydání: | 2022 |
Předmět: |
Technology
conjugated polymer IMPACT Chemistry Multidisciplinary Materials Science GROMACS Materials Science Multidisciplinary SEMICONDUCTORS 09 Engineering Physics Applied SIDE-CHAINS long-alkyl-group spacer organic electrochemical transistor (OECT) DESIGN conjugated polymers General Materials Science MODE Nanoscience & Nanotechnology amphipathic sidechains Science & Technology 02 Physical Sciences Chemistry Physical Mechanical Engineering Physics accumulation mode amphipathic sidechain long-alkyl-group spacers organic electrochemical transistors Chemistry Physics Condensed Matter Mechanics of Materials MOBILITY Physical Sciences TRANSCONDUCTANCE Science & Technology - Other Topics 03 Chemical Sciences BEHAVIOR |
Zdroj: | Advanced materials (Deerfield Beach, Fla.). 34(27) |
ISSN: | 1521-4095 |
Popis: | 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. |
Databáze: | OpenAIRE |
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