Influence of Imidazole-Based Acidity Control of PEDOT:PSS on Its Electrical Properties and Environmental Stability
- Authors
- Cho, Ahra; Kim, Seyul; Kim, Soyeon; Cho, Wonseok; Park, Chanil; Kim, Felix Sunjoo; Kim, Jung Hyun
- Issue Date
- Aug-2016
- Publisher
- WILEY
- Keywords
- antioxidants; conducting polymers; imidazole; neutralization; PEDOT:PSS; thin films; transparent conductor
- Citation
- JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, v.54, no.15, pp 1530 - 1536
- Pages
- 7
- Journal Title
- JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
- Volume
- 54
- Number
- 15
- Start Page
- 1530
- End Page
- 1536
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/6652
- DOI
- 10.1002/polb.24048
- ISSN
- 0887-6266
1099-0488
- Abstract
- Poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS) has been studied for a wide range of applications due to its potential as a transparent electrode. Herein, the use of imidazole and its derivatives as a neutralizing additive for PEDOT: PSS dispersion and in-depth studies of their effects in terms of electrical properties and stability is reported. Although the neutralization in general reduces the electrical conductivity of PEDOT: PSS, the conductivity after imidazole treatment (685.2 S cm(-1)) is higher than that after treatment of other derivatives. Spectroscopic and thermoelectric studies show that the de-doping effect resulted in the conductivity reduction. As a trade-off of the conductivity reduction, greatly enhanced long-term stability and noncorrosive characteristics are obtained after neutralization. The change in sheet resistance of imidazole-treated PEDOT: PSS after 500 h under harsh conditions (85 degrees C and 85% humidity) is half that of the untreated samples, demonstrating the great enhancement of the stability. (C) 2016 Wiley Periodicals, Inc.
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