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  4. Boosting OECT performance with PEGylated gold nanoparticles in hydrophobic channels
 
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Boosting OECT performance with PEGylated gold nanoparticles in hydrophobic channels

Citation Link: https://doi.org/10.15480/882.13886
Publikationstyp
Journal Article
Date Issued
2025-01-09
Sprache
English
Author(s)
Ho, Po Yuen 
Angewandte Polymerphysik M-EXK 6  
Ditzer, Oliver  
Solgi, Ali
Zhang, Haoran  
Thümmler, Ronja
Al-Hussein, Mahmoud  
Kleemann, Hans  
Sun, Ningwei  
Lissel, Franziska  
Angewandte Polymerphysik M-EXK 6  
TORE-DOI
10.15480/882.13886
TORE-URI
https://hdl.handle.net/11420/52423
Journal
Advanced functional materials  
Volume
35
Issue
2
Article Number
2412559
Citation
Advanced Functional Materials 35 (2): 2412559 (2025)
Publisher DOI
10.1002/adfm.202412559
Scopus ID
2-s2.0-85210380546
Publisher
Wiley
Organic electrochemical transistors (OECTs) require organic mixed ion-electron conductors (OMIECs) (i.e., hydrophilic materials supporting electron and ion transportation) as active materials. However, high-performance OMIECs grafted with hydrophilic side chains are difficult to synthesize and purify, and often suffer from swelling during operation. In contrast, the synthetic pathways toward a broad range of hydrophobic polymeric semiconductors used in classic organic-field-effect transistors are well established, and several are even commercially available. Yet, these hydrophobic materials do not intrinsically support ionic transport, limiting their application in OECTs. Here, poly(ethyleneglycol) (PEG)-coated gold nanoparticles (AuNP) are incorporated into conventional hydrophobic polymeric semiconductors like poly-3-hexylthiophene (P3HT), improving not only ionic but also electronic transport. The hydrophilic AuNPs modify P3HT crystallite orientation, shorten lamellar and π–π distances, and create pathways for ion penetration, as evidenced by GIWAXS and AFM studies. With 5 wt% AuNP loading, OECTs achieve µC* of 98 F cm−1 V−1 s−1, comparable to hydrophilic materials. The strategy also works for other polymer systems, offering a facile method to utilize hydrophobic materials in OECTs and boost their performance.
Subjects
gold nanoparticles | hydrophobic semiconductors | organic electrochemical transistors (OECT)
DDC Class
620.1: Engineering Mechanics and Materials Science
543: Analytic
Lizenz
https://creativecommons.org/licenses/by/4.0/
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