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Strategies for optimizing hydrophobic semiconducting polymers for OECTs: modifications and additives
Citation Link: https://doi.org/10.15480/882.17827
Publikationstyp
Doctoral Thesis
Date Issued
2026
Sprache
English
Author(s)
Advisor
Referee
Title Granting Institution
Technische Universität Hamburg
Place of Title Granting Institution
Hamburg
Examination Date
2025-09-19
Institute
TORE-DOI
Citation
Technische Universität Hamburg (2026)
Organic electrochemical transistors (OECTs) are promising for bioelectronics and neuromorphic computing but face challenges with organic mixed ion-electron conductors (OMIECs), such as swelling and limited synthesis flexibility. This research explores the synthesis of organometallics ruthenium (Ru)-containing polymetallaynes and engineering established hydrophobic organic semiconducting polymers (OSCPs). Ru-polymetallaynes were modified with different ligands to introduce ligand planarity and redox matching, where dithienopyrrole (DTP) showed the best performance due to enhanced metal-metal (M-M) interactions as a result of redox-matching, exhibiting enhanced state-retention ability and making it suitable for non-volatile memory applications. To improve OSCPs’ OECT performance, two metal-containing additives were investigated: poly(vinylferrocene) (PVF+) improved P3HT doping efficiency and device response time via enhanced hydrophilicity in the PVF+/P3HT blends, while poly(ethylene glycol) functionalized gold nanoparticles (PEG-AuNPs)/P3HT composites showed increased charge mobility (µ) and volumetric capacitance (C*), significantly improving OMIEC metrics such as µC*, making the OSCPs comparable to state-of-the-art OMIECs. Overall, incorporating metal-containing additives into hydrophobic OSCPs enhances both electronic and ionic performance, expanding the potential applications of this class of materials in OECTs.
Subjects
Organic semiconductor
organic eletrochemical transistor
organometallics
hydrophobic semiconducting polymer
nanoparticle
metal-containing additives
DDC Class
540: Chemistry
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Ho_Po_Yuen_Strategies_for_Optimizing_Hydrophobic_Semiconducting_Polymers_for_OECTs.pdf
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