Effects of various imidazole-based weak bases and surfactant on the conductivity and transparency of poly(3,4-ethylenedioxythiophene) films
- Authors
- Choi, Jong Seob; Yim, Jin-Heong; Kim, Dong-Won; Jeon, Jong-Ki; Ko, Young Soo; Kim, Youngjo
- Issue Date
- Dec-2009
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Poly(3,4-ethylenedioxythiophene); Imidazole derivatives; Surfactant; Surface resistance; Transparency; Conductivity; Conductive film
- Citation
- SYNTHETIC METALS, v.159, no.23-24, pp.2506 - 2511
- Indexed
- SCIE
SCOPUS
- Journal Title
- SYNTHETIC METALS
- Volume
- 159
- Number
- 23-24
- Start Page
- 2506
- End Page
- 2511
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/175722
- DOI
- 10.1016/j.synthmet.2009.08.049
- ISSN
- 0379-6779
- Abstract
- Poly(3,4-ethylenedioxythiophene) (PEDOT)-based conductive thin films with improved transparency and surface resistance can be prepared by using adequate weak bases and non-ionic surfactants. Among the imidazole-based weak bases, 2-ethyl-4-methyl-substituted imidazole showed the best performance in terms of surface resistance and transparency. It is speculated that 2-ethyl-4-methyl-imidazole causes reduced particle size because polymerization kinetics are retarded by the electron donating effect of ethyl and/or methyl groups in the imidazole ring. Addition of Triton X-100 may stabilize nanoscopic PEDOT particles in the coating solution resulting in low surface resistance (172 Omega/rectangle) and enhanced transparency (>90%) of the PEDOT film.
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