Spectroscopic decoding of solvent treatments in PEDOT:PSS via XPS and EPR analysis of charge transport
Conductive polymer PEDOT:PSS is widely used in flexible electronics; however, the structural and electronic impacts of secondary doping remain poorly understood at the molecular level. In this study, we employ a dual-spectroscopy strategy—x-ray Photoelectron Spectroscopy (XPS) and Electron Paramagne...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2025-01-01
|
| Series: | Materials Research Express |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/2053-1591/adec3f |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Conductive polymer PEDOT:PSS is widely used in flexible electronics; however, the structural and electronic impacts of secondary doping remain poorly understood at the molecular level. In this study, we employ a dual-spectroscopy strategy—x-ray Photoelectron Spectroscopy (XPS) and Electron Paramagnetic Resonance (EPR)—to elucidate how ethylene glycol (EG) and dimethyl sulfoxide (DMSO) modulate the structure and charge transport properties of PEDOT:PSS films. While DMSO facilitates benzoid-to-quinoid transitions and supports polaron organization, EG promotes partial PSS removal and film morphology refinement. Spectroscopic analysis revealed a direct correlation between secondary doping-induced structural reordering and electronic structure characteristics, resulting in conductivity enhancements exceeding 400-fold relative to pristine PEDOT:PSS. By directly linking spectroscopic signatures with electrical performance, this work provides a molecular-level perspective on secondary doping effects, offering a rational basis for designing next-generation conductive polymer systems. |
|---|---|
| ISSN: | 2053-1591 |