AI Article Synopsis
- Conducting polymers like PEDOT:PSS have improved their electric conductivity significantly, reaching around 3,000 S cm(-1), making them comparable to metals and potential substitutes for transparent conductive oxides.
- A key method for enhancing conductivity is solvent annealing, where PEDOT:PSS is treated with DMSO, which helps improve performance.
- This process not only boosts conductivity but also widens the range of effective conductivity in the negative potential direction, possibly due to an increase in the fraction of redox-active charge carriers.
Article Abstract
Electric conductivity of conducting polymers has been steadily enhanced towards a level worthy of being called its alias, "synthetic metal". PEDOT:PSS (poly(3,4-ethylenedioxythiophene) doped with poly(styrene sulfonate)), as a representative conducting polymer, recently reached around 3,000 S cm(-1), the value to open the possibility to replace transparent conductive oxides. The leading strategy to drive the conductivity increase is solvent annealing in which aqueous solution of PEDOT:PSS is treated with an assistant solvent such as DMSO (dimethyl sulfoxide). In addition to the conductivity enhancement, we found that the potential range in which PEDOT:PSS is conductive is tuned wider into a negative potential direction by the DMSO-annealing. Also, the increase in a redox-active fraction of charge carriers is proposed to be responsible for the enhancement of conductivity in the solvent annealing process.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3744797 | PMC |
| http://dx.doi.org/10.1038/srep02454 | DOI Listing |
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