Highly conductive PEDOT:PSS with enhanced chemical stability
- Authors
- Kim, Taegeun; Park, Sumin; Seo, Joonsik; Lee, Chan Woo; Kim, Jong-Man
- Issue Date
- Nov-2019
- Publisher
- ELSEVIER
- Keywords
- Conducting polymer; PEDOT:PSS; High conductivity; Perfluorooctane sulfonic acid; Chemical stability
- Citation
- ORGANIC ELECTRONICS, v.74, pp.77 - 81
- Indexed
- SCIE
SCOPUS
- Journal Title
- ORGANIC ELECTRONICS
- Volume
- 74
- Start Page
- 77
- End Page
- 81
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/32808
- DOI
- 10.1016/j.orgel.2019.06.033
- ISSN
- 1566-1199
- Abstract
- As a family of conjugated polymers, poly(3,4-ethylenedioxythiophene):poly(styrene-sulfonate) (PEDOT:PSS) has been extensively investigated because of its high conductivity, solution processability, mechanical flexibility and transparency. However, poor chemical stability makes this conducting polymer difficult for practical application. In addition, a harsh doping condition (eg, aqueous H2SO4) is required to obtain high conductivity. By employing perfluorooctane sulfonic acid (PFOSA) as a mild dopant, we were able to fabricate a PEDOT:PSS film with high conductivity (ca. 1700 S/cm) as well as significantly improved chemical and long term stability. The results of detailed spectroscopic and morphological studies show that the superhydrophobic tails and hydrophilic head-groups of PFOSA in the doped PEDOT:PSS are critical factors responsible for the improved properties of the conducting polymer. Finally, owing to its mild nature, PFOSA doping can be employed to fabricate a transparent, flexible and conducting PEDOT:PSS coated PET film.
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