Dye-doped poly(3,4-Ethylenedioxythiophene)-Poly(Styrenesulfonate) electrodes for the application in organic light-emitting diodes

•Solution-processed doping for conductive polymer is suggested.•A p-type dopant, organic cationic azo dye was used.•The doped PEDOT:PSS exhibited enhanced conductivities.•Highly conductive electrodes for OLEDs were demonstrated. A facile way to enhance the electrical conductivity of conductive polym...

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Bibliographic Details
Published inThin solid films Vol. 707; p. 138078
Main Authors Huseynova, Gunel, Lee, Seung-Hoon, Joo, Chul Woong, Lee, Ye-Seul, Lim, Young-Ji, Park, Jaeyoung, Yoo, Jae-Min, Cho, Nam Sung, Kim, Yong Hyun, Lee, Jonghee, Lee, Jae-Hyun
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.08.2020
Subjects
Cationic dyes
Charge transfer complex
Conductive polymers
Electrode materials
Organic dopants
Organic light emitting diodes
PEDOT:PSS
Polymer electrodes
Solution-processed electrical doping
Electrode materials
Organic light emitting diodes
Solution-processed electrical doping
Conductive polymers
Charge transfer complex
Polymer electrodes
Organic dopants
Cationic dyes
PEDOT:PSS
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Summary:•Solution-processed doping for conductive polymer is suggested.•A p-type dopant, organic cationic azo dye was used.•The doped PEDOT:PSS exhibited enhanced conductivities.•Highly conductive electrodes for OLEDs were demonstrated. A facile way to enhance the electrical conductivity of conductive polymers via solution-processed low-concentration doping, is suggested. An organic cationic azo dye, methyl red was used as a p-type dopant for poly(3, 4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) to realize highly conductive electrodes for organic light-emitting diode applications. By optimization of the dopant concentration, the doped PEDOT:PSS films exhibited electrical conductivities enhanced by three orders of magnitude compared to the pristine films. Ultraviolet-visible absorption spectroscopy studies indicate that charge transfer complexes between PEDOT:PSS and the dopant were formed. It was found that the dye exhibits high tendency to oxidize the polymer in a single-blend system which is necessary for the efficient doping. Our research proposes a simple and low-cost doping agent to improve the conductivity and sheet resistance of PEDOT:PSS in order to apply it as a promising electrode material for various kinds of highly flexible organic electronic devices.
ISSN:0040-6090
1879-2731
DOI:10.1016/j.tsf.2020.138078