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Unraveling vertical inhomogeneity in vapour phase polymerized PEDOT:Tos films
- Source :
- 'Journal of Materials Chemistry A ', vol: 8, pages: 18726-18734 (2020)
- Publication Year :
- 2020
- Publisher :
- Royal Society of Chemistry (RSC), 2020.
-
Abstract
- The conducting polymer poly(3,4-ethylenedioxythiophene) (PEDOT) forms a promising alternative to conventional inorganic conductors, where deposition of thin films via vapour phase polymerization (VPP) has gained particular interest owing to high electrical conductivity within the plane of the film. The conductivity perpendicular to the film is typically much lower, which may be related not only to preferential alignment of PEDOT crystallites but also to vertical stratification across the film. In this study, we reveal non-linear vertical microstructural variations across VPP PEDOT:Tos thin films, as well as significant differences in doping level between the top and bottom surfaces. The results are consistent with a VPP mechanism based on diffusion-limited transport of polymerization precursors. Conducting polymer films with vertical inhomogeneity may find applications in gradient-index optics, functionally graded thermoelectrics, and optoelectronic devices requiring gradient doping. The fulltext is published under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence.https://creativecommons.org/licenses/by-nc/3.0/
- Subjects :
- Conductive polymer
Materials science
Renewable Energy, Sustainability and the Environment
business.industry
Doping
Materialkemi
02 engineering and technology
General Chemistry
Conductivity
010402 general chemistry
021001 nanoscience & nanotechnology
Thermoelectric materials
01 natural sciences
0104 chemical sciences
PEDOT:PSS
Polymerization
Electrical resistivity and conductivity
Materials Chemistry
Optoelectronics
General Materials Science
Thin film
0210 nano-technology
business
Subjects
Details
- ISSN :
- 20507496 and 20507488
- Volume :
- 8
- Database :
- OpenAIRE
- Journal :
- Journal of Materials Chemistry A
- Accession number :
- edsair.doi.dedup.....12f3f1cd738af57e46741fbf1355db79